US20120194952A1 - Controllable electrical outlet and a method of operation thereof - Google Patents
Controllable electrical outlet and a method of operation thereof Download PDFInfo
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- US20120194952A1 US20120194952A1 US13/396,671 US201213396671A US2012194952A1 US 20120194952 A1 US20120194952 A1 US 20120194952A1 US 201213396671 A US201213396671 A US 201213396671A US 2012194952 A1 US2012194952 A1 US 2012194952A1
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- United States
- Prior art keywords
- electrical
- current
- outlet
- switch
- operatively connected
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to underload or no-load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/58—The condition being electrical
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Definitions
- Certain embodiments of the present invention relate to electrical outlets. More particularly, certain embodiments relate to electrical outlets or pluggable apparatus that may be automatically disabled as a safety feature.
- Standard electrical outlets may be found in homes, office buildings, and factories, for example. Such electrical outlets provide readily available electricity to those who need it, for example, for lamps, appliances, televisions, audio equipment, curling irons, etc.
- electrical wiring is routed from an electrical panel to the electrical outlet, with possible intermediate routings to other electrical outlets or lights along the way.
- the electrical wiring includes a hot wire (typically a black wire or a blue wire) that brings electrical power to the electrical outlet from the electrical panel, and a neutral wire (typically a white wire) that returns power from the electrical outlet to the electrical panel.
- a third wire is often provided (typically a green wire) that serves as a grounding wire.
- an electrical load e.g., a lamp
- an electrical load e.g., a lamp
- a closed circuit is completed between the hot wire and the neutral wire and electrical current flows between the electrical panel and the electrical outlet through the electrical load.
- electrical power is provided as an alternating current (AC) at about 120 Volts (i.e., 120 VAC) at a frequency of 60 Hz.
- External timers exist that may be plugged into an electrical outlet. Such external timers are often used to turn on a lamp at a particular time of day (e.g., 6:00 p.m.), and then turn off the lamp at another particular time of day (e.g., 12:00 midnight). Such external timers typically use power provided by the electrical outlet to operate and are always running (i.e., keeping time) as long as they are plugged in to the electrical outlet.
- GFCI ground-fault circuit interrupters
- a person may plug an electrical load (e.g., a hair curling iron) into an electrical outlet and end up forgetting about it, leaving the electrical load plugged in and drawing current, due to becoming distracted or because they may be suffering from short term memory loss, for example.
- an electrical load e.g., a hair curling iron
- the electrical load could become a fire hazard or some other type of safety hazard.
- An embodiment of the present invention comprises an electrical outlet including a hot electrical terminal and a neutral electrical terminal.
- the electrical outlet further includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet.
- the electrical outlet also includes a carrier-current transceiver operatively connected to the hot electrical terminal and the neutral electrical terminal to receive and transmit messages over existing electrical wires.
- the electrical outlet further includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current.
- the electrical outlet also includes an addressable microcontroller operatively connected to the carrier-current transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the carrier-current transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the carrier-current transceiver to the electrical switch within the electrical outlet.
- the electrical outlet may further include a power regulator operatively connected between the hot electrical terminal and the neutral electrical terminal to convert AC electrical power to DC electrical power.
- the power regulator may further be operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide the DC electrical power thereto.
- the electrical outlet may also include a DC battery operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide DC electrical power thereto.
- the electrical outlet may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- Another embodiment of the present invention comprises an electrical outlet for providing AC electrical power to an electrical load.
- the electrical outlet has a hot electrical portion and a neutral electrical portion and is capable of having an electrical load plugged thereinbetween.
- the electrical outlet comprises a safety apparatus including a current sensor adapted to detect an electrical current flowing between the hot electrical portion and the neutral electrical portion in response to a current drawing load being plugged into the electrical outlet.
- the safety apparatus further includes a carrier-current transceiver operatively connected to the hot electrical portion and the neutral electrical portion to receive and transmit messages over existing electrical wires.
- the safety apparatus also includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current.
- the safety apparatus further includes an addressable microcontroller operatively connected to the carrier-current transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the carrier-current transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the carrier-current transceiver to the electrical switch within the electrical outlet.
- the safety apparatus may further include a power regulator operatively connected between the hot electrical portion and the neutral electrical portion to convert AC electrical power to DC electrical power.
- the power regulator may further be operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide the DC electrical power thereto.
- the safety apparatus may also include a DC battery operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide DC electrical power thereto.
- the safety apparatus may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- a further embodiment of the present invention comprises an electrical outlet.
- the electrical outlet includes a hot electrical terminal and a neutral electrical terminal.
- the electrical outlet also includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet.
- the electrical outlet further includes a wireless transceiver to receive and transmit messages wirelessly.
- the electrical outlet also includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current.
- the electrical outlet further includes a microcontroller operatively connected to the wireless transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the wireless transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the wireless transceiver to the electrical switch within the electrical outlet.
- the electrical outlet may further include a power regulator operatively connected between the hot electrical terminal and the neutral electrical terminal to convert AC electrical power to DC electrical power.
- the power regulator may further be operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide the DC electrical power thereto.
- the electrical outlet may also include a DC battery operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide DC electrical power thereto.
- the electrical outlet may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- Another embodiment of the present invention comprises an electrical outlet for providing AC electrical power to an electrical load.
- the electrical outlet has a hot electrical portion and a neutral electrical portion and is capable of having an electrical load plugged thereinbetween.
- the electrical outlet comprises a safety apparatus including a current sensor adapted to detect an electrical current flowing between the hot electrical portion and the neutral electrical portion in response to a current drawing load being plugged into the electrical outlet.
- the safety apparatus further includes a wireless transceiver to receive and transmit messages wirelessly.
- the safety apparatus also includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current.
- the safety apparatus further includes a microcontroller operatively connected to the wireless transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the wireless transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the wireless transceiver to the electrical switch within the electrical outlet.
- the safety apparatus may further include a power regulator operatively connected between the hot electrical portion and the neutral electrical portion to convert AC electrical power to DC electrical power.
- the power regulator may further be operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide the DC electrical power thereto.
- the safety apparatus may also include a DC battery operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide DC electrical power thereto.
- the safety apparatus may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- a further embodiment of the present invention comprises a system including existing electrical wires including a hot electrical wire and a neutral electrical wire for providing electrical power.
- the system also includes a first carrier-current transceiver operatively connected to the existing electrical wires.
- the system further includes a central computer operatively connected to the first carrier-current transceiver to send and receive messages over the existing electrical wires via said first carrier-current transceiver.
- the system also includes at least one addressable electrical outlet operatively connected to the existing electrical wires.
- the addressable electrical outlet includes a hot electrical terminal and a neutral electrical terminal.
- the addressable electrical outlet further includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet.
- the addressable electrical outlet also includes a second carrier-current transceiver operatively connected to the hot electrical terminal and the neutral electrical terminal to receive and send messages over the existing electrical wires.
- the addressable electrical outlet further includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current.
- the addressable electrical outlet also includes a microcontroller operatively connected to the second carrier-current transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the second carrier-current transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the second carrier-current transceiver to the electrical switch within the electrical outlet.
- the system may further include a display panel operatively connected to said central computer to display a status of the at least one addressable electrical outlet.
- Another embodiment of the present invention comprises a system including existing electrical wires including a hot electrical wire and a neutral electrical wire for providing electrical power.
- the system further includes a central computer to provide timing and control capability and having a first wireless transceiver to receive and transmit messages wirelessly.
- the system also includes at least one addressable electrical outlet operatively connected to the existing electrical wires.
- the at least one addressable electrical outlet includes a hot electrical terminal and a neutral electrical terminal.
- the addressable electrical outlet further includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet.
- the addressable electrical outlet also includes a second wireless transceiver to receive and transmit messages wirelessly.
- the addressable electrical outlet further includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current.
- the addressable electrical outlet also includes a microcontroller operatively connected to the second wireless transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the second wireless transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the second wireless transceiver to the electrical switch within the electrical outlet.
- the system may further include a display panel operatively connected to the central computer to display a status of the at least one addressable electrical outlet.
- FIG. 1 illustrates a schematic block diagram of a first exemplary embodiment of an electrical outlet
- FIG. 2 illustrates a schematic block diagram of a second exemplary embodiment of an electrical outlet
- FIG. 3 illustrates a schematic block diagram of a third exemplary embodiment of an electrical outlet
- FIG. 4 illustrates a schematic block diagram of a fourth exemplary embodiment of an electrical outlet
- FIG. 5 illustrates a flowchart of an exemplary embodiment of a method of electrically disconnecting an electrical outlet from an external electrical load
- FIG. 6 illustrates a schematic block diagram of a device that may be plugged into a standard electrical outlet to provide the functionality of electrically disconnecting an external electrical load from the standard electrical outlet;
- FIG. 7 illustrates a functional block diagram of an exemplary embodiment of a system for controlling a plurality of electrical outlets
- FIG. 8 illustrates a functional block diagram of an exemplary embodiment of a central computer communicating with a controllable electrical outlet
- FIG. 9 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling a plurality of electrical outlets via existing electrical wiring
- FIG. 10 illustrates a schematic block diagram of a first embodiment of a controllable electrical outlet capable of being controlled via existing electrical wiring
- FIG. 11 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling the electrical outlet of FIG. 10 via existing electrical wiring;
- FIG. 12 illustrates a flowchart of an exemplary embodiment of a method for controlling an electrical outlet
- FIG. 13 illustrates a schematic block diagram of a second embodiment of a controllable electrical outlet capable of being controlled via wireless communications
- FIG. 14 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling the electrical outlet of FIG. 13 via wireless communications
- FIG. 15 illustrates a schematic block diagram of a third exemplary embodiment of a controllable electrical outlet capable of being controlled via dedicated wired communications.
- FIG. 16 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling the electrical outlet of FIG. 15 via dedicated wired communications.
- FIG. 1 illustrates a schematic block diagram of a first exemplary embodiment of an electrical outlet 100 .
- the electrical outlet 100 includes a “hot” portion or side 101 and a “neutral” portion or side 102 .
- Electrical power is brought in to the hot side 101 via a hot wire (typically a black wire or a blue wire) from, for example, an electrical panel.
- the electrical power is brought out of the neutral side 102 of the electrical outlet 100 via a neutral wire (typically a white wire) that returns power from the electrical outlet 100 to, for example, the electrical panel.
- a third wire is often provided (typically a green wire) that serves as a grounding wire and may be connected to a grounding terminal of the electrical outlet 100 , if such a grounding terminal (not shown) is provided.
- An electrical load 110 may be plugged into prongs 111 and 112 of the electrical outlet 100 in order to provide electrical power to the electrical load 110 .
- the electrical load 110 is not part of the electrical outlet 100 , however.
- Prong 111 is connected to the hot side 101 and prong 112 is connected to the neutral side 102 .
- an electrical load 110 is plugged into the prongs 111 and 112 of the electrical outlet 100 , forming a closed circuit path, electric current flows between the hot side 101 and the neutral side 102 through the electrical load 110 .
- the electrical load may be a hair dryer, a hair curling iron, an electrical appliance, or some other type of electrical load.
- the electrical outlet 100 also includes a current sensor 120 , a counter 130 , and an electrical switch 140 .
- the current sensor 120 is in the current path on the hot side 101 of the electrical outlet 100 .
- the current sensor 120 senses when electric current flows through the electric outlet 100 (because of the connected load 110 ) and outputs an enabling signal 121 to the counter 130 , causing the counter 130 to start counting over a preset time interval.
- the counter 130 When the counter 130 is finished counting over the preset time interval, the counter outputs a triggering or tripping signal 131 to the electrical switch 140 which is also in the current path on the hot side 101 of the electrical outlet 100 .
- the electrical switch 140 is in a closed (i.e., conducting) position 141 , allowing electric current to flow through the electrical outlet 100 and the load 110 until the electrical switch 140 is tripped by the trigger signal 131 .
- the electrical switch 140 opens to the opened (non-conducting) position 142 , preventing current flow through the electrical outlet 100 and, therefore, through the electrical load 110 .
- the counter 130 may be a digital counter implemented on an integrated circuit chip which is well known in the art. Other types of counters or timing circuits may be possible as well.
- the current sensor 120 may be, for example, a current transformer based device, a Hall effect based device, a magnetoresistive effect based device, or a resistor based device which are all well known in the art and capable of sensing AC current. Other types of current sensors may be possible as well.
- the electrical switch 140 may be a triggerable or controllable single pole single throw (SPST) power switch of any of various types which are well known in the art.
- the electrical switch 140 is manually resettable from the open position 142 to the closed position 141 via a reset button 145 of, for example, the push-button type which are well known in the art. Other types of reset mechanisms are possible as well.
- the current sensor 120 , the counter 130 , and the electrical switch 140 may each be discrete devices and may all be mounted on a printed circuit board (PCB), for example, within the electrical outlet 100 .
- PCB printed circuit board
- any or all of the devices 120 , 130 , and 140 may be integrated into a single device.
- the current sensor 120 and the counter 130 may each be integrated into a single integrated circuit device which may be mounted on a PCB.
- the devices 120 , 130 , and 140 will require electrical power to operate.
- some or all of the devices 120 , 130 , and 140 may require DC electrical power VDD of, for example, 5 VDC to operate.
- the electrical outlet 100 may include a power regulator 150 operatively connected between the hot side 101 and the neutral side 102 of the electrical outlet 100 and capable of converting AC electrical power to DC electrical power VDD with respect to a DC ground potential GND, as shown in FIG. 1 .
- the DC electrical power VDD and DC ground potential GND provided by the power regulator 150 may be routed to the various devices 120 , 130 , and 140 via, for example, power traces on a PCB or via discrete wires.
- two or more levels of DC voltage may be required.
- the power regulator 150 may provide two or more levels of DC electrical power (e.g., 5 VDC and 12 VDC).
- FIG. 2 illustrates a schematic block diagram of a second exemplary embodiment of an electrical outlet 200 .
- the electrical outlet 200 is identical to the electrical outlet 100 of FIG. 1 except that, instead of a power regulator 150 , a battery 210 is provided which supplies DC electrical power VDD with respect to a DC ground potential GND. Again, the DC electrical power may be used by the current sensor 120 , the counter 130 , and/or the electrical switch 140 .
- an electrical outlet may include both a power regulator 150 and at least one battery 210 .
- the power regulator 150 may power one subset of the internal devices of the electrical outlet and the battery 210 may power a second subset of the internal devices of the electrical outlet.
- the battery 210 may power the current sensor 120 and the counter 130 , while the power regulator 150 may power the electrical switch 140 .
- FIG. 3 illustrates a schematic block diagram of a third exemplary embodiment of an electrical outlet 300 .
- the electrical outlet 300 is identical to the electrical outlet 100 of FIG. 1 except that the hot side 101 and the neutral side 102 are reversed. That is, the current sensor 120 and the electrical switch 140 are in the neutral side path of the electrical outlet 300 instead of the hot side path.
- Such a configuration 300 may work equally as well as the configuration of FIG. 1 .
- FIG. 4 illustrates a schematic block diagram of a fourth exemplary embodiment of an electrical outlet 400 .
- the electrical switch 140 is on the hot side 101 of the electrical outlet 400 , however, the current sensor 120 is on the neutral side 102 of the electrical outlet 400 .
- a configuration 400 may work equally as well as the configuration of FIG. 1 or the configuration of FIG. 3 .
- Other electrical outlet configurations having a current sensor 120 , a counter 130 , and an electrical switch 140 may be possible as well, in accordance with various other embodiments of the present invention.
- FIG. 5 illustrates a flowchart of an exemplary embodiment of a method 500 of electrically disconnecting an electrical outlet from an external electrical load.
- step 510 an electrical load that is plugged in to an electrical outlet is sensed.
- step 520 a preset time interval begins to elapse (e.g., a counter may be enabled) in response to the plugged in electrical load being sensed. If the preset time interval has elapsed (e.g., see step 525 ) then, in step 530 , a conductive path within the electrical outlet is opened in response to reaching the end of the preset time interval, thereby stopping the flow of electrical current from the electrical outlet to the electrical load.
- a preset time interval begins to elapse (e.g., a counter may be enabled) in response to the plugged in electrical load being sensed. If the preset time interval has elapsed (e.g., see step 525 ) then, in step 530 , a conductive path within the electrical outlet is opened in response to reaching
- the method 500 may further include re-closing the open conductive path within the electrical outlet by manually activating a reset control (e.g., a push-type reset button) on an external portion of the electrical outlet. If the electrical load is still plugged into the electrical outlet, the electrical outlet will again, in step 510 , sense the load and the process will start again.
- a reset control e.g., a push-type reset button
- the method 500 may further include converting AC electrical power to DC electrical power within the electrical outlet and providing the DC electrical power to circuitry within the electrical outlet.
- the method 500 may also include providing DC electrical power to circuitry within the electrical outlet independent of any AC electrical power (e.g., via a battery).
- a user may plug a curling iron (as an electrical load 110 ) into the prongs 111 and 112 of the electrical outlet 100 in anticipation of using the curling iron after it heats up, but then forgets about it.
- the curling iron would continue to draw current from the electrical outlet and possibly continue to heat up.
- the electrical switch 140 will open and prevent electrical current from flowing to the curling iron.
- the preset time interval may be, for example, ten minutes.
- the user may come back later (e.g., after the ten minutes) and press the reset button 145 on the electrical outlet 100 to close the electrical switch 140 , allowing the curling iron to begin heating up once again.
- the current sensor 120 , the counter 130 , and the electrical switch 140 serve as a safety apparatus within the electrical outlet 100 .
- the reset button 145 or some other visible portion of the electrical outlet 100 may be fitted with a light-emitting diode (LED), or some other type of indicator. The LED is turned on (emits light) when the electrical switch 140 is in the open position 142 , indicating to the user that the electrical outlet 100 is to be reset.
- LED light-emitting diode
- a user may plug a waffle iron (as an electrical load 110 ) into the prongs 111 and 112 of the electrical outlet 100 in anticipation of making waffles.
- the user may leave the kitchen where the waffle iron is plugged in and the waffle iron may accidentally drop closed, causing the waffle iron to draw current and heat up.
- the waffle iron would continue to draw current from the electrical outlet and possibly continue to heat up.
- the electrical switch 140 will open and prevent electrical current from flowing to the waffle iron.
- the preset time interval may be, for example, one minute.
- the user may come back later (e.g., after the one minute) and press the reset button 145 on the electrical outlet 100 to close the electrical switch 140 , allowing the waffle iron to begin heating up once again.
- the current sensor 120 , the counter 130 , and the electrical switch 140 serve as a safety apparatus within the electrical outlet 100 .
- Such electrical outlets may be judicially placed within a household.
- bathrooms and kitchens may be places within a household where it makes the most sense to install such electrical outlets since these rooms are where electrical loads such as curling irons, blow dryers, waffle irons, and other appliances are most often used.
- college dorm rooms and nursing homes may be places where such electrical outlets would be of great benefit.
- electrical outlets may be very practical, allowing various types of power tools or equipment to time out and turn off after a certain preset period of time.
- the preset period of time may be selectable or adjustable.
- an electrical outlet may be configured with DIP (dual inline package) switches or some other type of selector or user interface (e.g., up/down buttons) operatively connected to the counter 130 , allowing the preset time interval to be selected.
- DIP dual inline package
- selector or user interface e.g., up/down buttons
- Such selectability would allow the electrical outlet to be more flexible.
- an electrician may install an electrical outlet in a bathroom and set the time interval to seven minutes. The electrician may install another electrical outlet of the same type in a kitchen and set the time interval to two minutes.
- FIG. 6 illustrates a schematic block diagram of a device 600 (a pluggable apparatus) that may be plugged into a standard electrical outlet to provide the functionality of electrically disconnecting an external electrical load 610 from the standard electrical outlet.
- the device 600 is very similar to the device 100 of FIG. 1 except that the device 600 is not an electrical outlet as such that is mounted, for example, within a wall and is wired to an electrical panel. Instead, the device 600 is an external device that may be plugged into a standard electrical outlet and yet provide the same functionality as the electrical outlet 100 of FIG. 1 .
- the device 600 includes a “hot” portion or side 601 and a “neutral” portion or side 602 .
- the hot side 601 plugs into a hot prong of an electrical outlet
- the neutral side 602 plugs into a neutral prong of an electrical outlet.
- a third portion may be provided that serves as a grounding portion and may be plugged into a grounding plug of an electrical outlet.
- An electrical load 610 may be plugged into prongs 611 and 612 of the device 600 in order to provide electrical power to the electrical load 610 .
- the electrical load 610 is not part of the electrical outlet or the device 600 , however.
- Prong 611 is connected to the hot side 601 and prong 612 is connected to the neutral side 602 .
- an electrical load 610 is plugged into the prongs 611 and 612 of the device 600 , forming a closed circuit path, electric current flows between the hot side 601 and the neutral side 602 through the electrical load 610 .
- the electrical load may be a hair dryer, a hair curling iron, an electrical appliance, or some other type of electrical load.
- the device 600 also includes a current sensor 620 , a counter 630 , and an electrical switch 640 .
- the current sensor 620 is in the current path on the hot side 601 of the device 600 .
- the current sensor 620 senses when electric current flows through the device 600 (because of the connected load 610 ) and outputs an enabling signal 621 to the counter 630 , causing the counter 630 to start counting over a preset time interval.
- the counter 630 When the counter 630 is finished counting over the preset time interval, the counter outputs a triggering or tripping signal 631 to the electrical switch 640 which is also in the current path on the hot side 601 of the device 600 .
- the electrical switch 640 is in a closed (i.e., conducting) position 641 , allowing electric current to flow from the electrical outlet through the device 600 and the load 610 until the electrical switch 640 is tripped by the trigger signal 631 .
- the electrical switch 640 opens to the opened (non-conducting) position 642 , preventing current flow through the device 600 and, therefore, through the electrical load 610 .
- the counter 630 may be a digital counter implemented on an integrated circuit chip which is well known in the art. Other types of counters or timing circuits may be possible as well.
- the current sensor 620 may be, for example, a current transformer based device, a Hall effect based device, a magnetoresistive effect based device, or a resistor based device which are all well known in the art and capable of sensing AC current. Other types of current sensors may be possible as well.
- the electrical switch 640 may be a triggerable or controllable single pole single throw (SPST) power switch of any of various types which are well known in the art.
- the electrical switch 640 is manually resettable from the open position 642 to the closed position 641 via a reset button 645 of, for example, the push-button type which are well known in the art. Other types of reset mechanisms are possible as well.
- the current sensor 620 , the counter 630 , and the electrical switch 640 may each be discrete devices and may all be mounted on a printed circuit board (PCB), for example, within the device 600 .
- PCB printed circuit board
- any or all of the elements 620 , 630 , and 640 may be integrated into a single device.
- the current sensor 620 and the counter 630 may each be integrated into a single integrated circuit device which may be mounted on a PCB.
- the elements 620 , 630 , and 640 will require electrical power to operate.
- some or all of the elements 620 , 630 , and 640 may require DC electrical power VDD of, for example, 5 VDC to operate.
- the device 600 may include a power regulator 650 operatively connected between the hot side 601 and the neutral side 602 of the device 600 and capable of converting AC electrical power to DC electrical power VDD with respect to a DC ground potential GND, as shown in FIG. 6 .
- the DC electrical power VDD and DC ground potential GND provided by the power regulator 650 may be routed to the various elements 620 , 630 , and 640 via, for example, power traces on a PCB or via discrete wires.
- two or more levels of DC voltage may be required.
- the power regulator 650 may provide two or more levels of DC electrical power (e.g., 5 VDC and 12 VDC).
- the external device 600 may be configured and function similarly to the configurations shown in FIGS. 2-4 herein. Other configurations are possible as well.
- FIG. 7 illustrates a functional block diagram of an exemplary embodiment of a system 700 for controlling a plurality of electrical outlets.
- the central computer 710 may be, for example, a standard personal computer (PC), a workstation, a server, or a customized microprocessor based design.
- the central computer 710 operatively interfaces to a plurality of controllable electrical outlets 720 .
- the interfaces between the central computer 710 and the controllable electrical outlets 720 may be via existing electrical wiring, dedicated communication wiring, or wireless techniques as are described in detail later herein.
- FIG. 8 illustrates a functional block diagram of an exemplary embodiment of the central computer 710 of FIG. 7 communicating with a controllable electrical outlet 720 .
- communication between the central computer 710 and any controllable electrical outlet 720 includes the transmission of a current sense event message 810 from the controllable electrical outlet 720 to the central computer 710 , a timed-out event message 820 from the central computer 710 to the controllable electrical outlet 720 and, optionally, a power reset message 830 from the central computer 710 to the controllable electrical outlet 720 .
- Such communications are described in more detail later herein.
- the system 700 may include a status display panel 840 operatively connected to the central computer 710 and used to display a status (e.g., closed, open, in use for x more minutes, etc.) of the various controllable electrical outlets 720 .
- a status e.g., closed, open, in use for x more minutes, etc.
- FIG. 9 illustrates a schematic block diagram of an exemplary embodiment of a system 900 for controlling a plurality of electrical outlets 720 via existing electrical wiring 910 .
- the electrical wiring 910 is also used to communicate messages between the central computer 710 and the electrical outlets as described for FIG. 8 .
- the central computer 710 and the controllable electrical outlets 720 as described herein may be installed into homes, factories, and other facilities without having to run any new communication wires between them.
- FIG. 10 illustrates a schematic block diagram of a first embodiment of a controllable electrical outlet 720 capable of being controlled via existing electrical wiring 910 as shown in FIG. 9 .
- the controllable electrical outlet 720 includes a current sensor 120 , an electrical switch 140 , and a power regulator 150 .
- the controllable electrical outlet 720 includes an addressable microcontroller 1010 .
- the controllable electrical outlet 720 also includes a carrier-current transceiver 1020 .
- the microcontroller 1010 provided control of the carrier-current transceiver 1020 and also operatively interfaces to the current sensor 120 and the electrical switch 140 .
- the carrier-current transceiver 1020 is a device that is operatively connected to the hot and neutral terminals or portions 101 and 102 of the controllable electrical outlet 720 and is capable of sending and receiving messages over the existing electrical wiring 910 .
- the hot terminal 101 is connected to the hot wire 901 of the existing electrical wiring 910 and the neutral terminal 102 is connected to the neutral wire 902 of the existing electrical wiring 910 within the controllable electrical outlet 720 .
- Such carrier-current transceivers 1020 are well known in the art and may be used to send and receive low bandwidth and/or high bandwidth messages.
- the National Semiconductor LM1893 and LM2893 devices are examples of carrier-current transceivers.
- Such carrier-current transceivers use electrical wiring (power mains) to transfer information between remote locations (e.g., between a central computer and a plurality of controllable electrical outlets as described herein, in accordance with various embodiments of the present invention).
- FIG. 11 illustrates a schematic block diagram of an exemplary embodiment of a system 1100 for controlling the electrical outlet 720 of FIG. 10 via existing electrical wiring 910 .
- the controllable electrical outlet 720 includes a first carrier-current transceiver 1020 as well as other internal circuitry 1120 (e.g., current sensor 120 , electrical switch 140 , power regulator 150 , and addressable microcontroller 1010 ).
- the first carrier-current transceiver 1020 is operatively connected to the existing electrical wiring 910 as illustrated in FIG. 11 .
- the system 1100 includes the central computer 710 and a second carrier-current transceiver 1110 .
- the second carrier-current transceiver 1110 is also operatively connected to the existing electrical wiring 910 as illustrated in FIG. 11 .
- the carrier-current transceiver 1110 may be an integral part of the central computer 710 .
- the carrier-current transceivers are able to transmit information onto and receive information off of the electrical wiring 910 .
- the first carrier-current transceiver 1020 within the controllable electrical outlet 720 is also operatively connected to the addressable microcontroller 1010 .
- the addressable microcontroller 1010 may be, for example, a microprocessor or a microprocessor-based device capable of interfacing with and communicating with the first carrier-current transceiver 1020 .
- the microcontroller 1010 may be configured from other electronic components other than a microprocessor, in accordance with other alternative embodiments of the present invention.
- the microcontroller 1010 is addressable, meaning that messages being sent over the electrical wiring 910 may be identified as intended for a particular electrical outlet by including an identifying address (e.g., a digital address) in the sent message which corresponds to a predefined address of the electrical outlet 720 .
- an identifying address e.g., a digital address
- a message e.g., a timed-out event message
- the addressable microcontroller 1010 within a particular electrical outlet 720 will accept the message as being intended for that particular electrical outlet 720 only if the address in the message matches the address of that particular electrical outlet 720 , as determined by the addressable microcontroller 1010 . In this way, only the intended electrical outlet 720 acts upon the message.
- FIG. 12 illustrates a flowchart of an exemplary embodiment of a method 1200 for controlling an addressable electrical outlet 720 .
- step 1210 sense an electrical load plugged into an electrical outlet.
- step 1220 report the sensing of the electrical load (e.g., via a current sense event message) to a central computer.
- step 1230 start a timing routine within the central computer in response to reporting the sensing.
- the timing routine is complete (predetermined time interval has elapsed) as determined in step 1240 then, in step 1250 , the central computer reports the completion of the timing routine (e.g., via a timed-out event message) to the electrical outlet.
- step 1260 open a conductive path within the electrical outlet in response to the reporting of the completion of the timing routine to stop the flow of electric current from the electrical outlet to the electrical load.
- step 1270 the opened conductive path may be re-closed, allowing current to once again flow to the electrical load and starting the sensing and timing process over again.
- a user in a dorm room plugs a hot plate (electrical load 110 ) into one of the three controllable electrical outlets 720 , shown in FIG. 9 , in order to heat a can of soup.
- the current sensor 120 within the electrical outlet 720 immediately senses a flow of current from the electrical outlet 720 to the hot plate and sends a current sense signal 121 to the addressable microcontroller 1010 , which the current sensor 120 is operatively connected to, within the electrical outlet 720 .
- the addressable microcontroller 1010 Upon receiving the current sense signal 121 , the addressable microcontroller 1010 sends a current sense event message 810 to the carrier-current transceiver 1020 , which the microcontroller is operatively connected to, within the electrical outlet 720 .
- the message 810 includes the unique identifying address of the electrical outlet 720 .
- the carrier-current transceiver 1020 transforms the message 810 for transmission over the electrical wiring 910 and sends the message over the electrical wiring 910 .
- the carrier-current transceiver 1110 receives the message 810 off of the electrical wiring 910 , transforms the message, and forwards the message to the central computer 710 .
- the central computer 710 processes the message 810 and starts a timing routine within the central computer 710 .
- the timing routing essentially counts over a predefined time interval.
- the central computer 710 sends a timed-out event message 820 out onto the electrical wiring 910 via the carrier-current transceiver 1110 .
- the timed-out event message 820 includes the address of the electrical outlet 720 which originally sent the current sense event message 810 .
- Each of the plurality of controllable electrical outlets 720 receives the timed-out event message 820 at its respective carrier-current transceiver 1020 and transforms and passes the message 820 onto its respective addressable microcontroller 1010 .
- the microcontroller 1010 of the electrical outlet 720 corresponding to the sent address accepts the timed-out event message 820 .
- the microcontroller 1010 processes the message 820 and outputs a trigger signal 131 to the electrical switch 140 in response to the message 820 , causing the electrical switch 140 to open (e.g., become non-conductive in the open position 142 ), thereby stopping the flow of electric current from the electrical outlet 720 to the hot plate (electrical load 110 ).
- the hot plate will be turned off after, for example, five minutes.
- the electrical outlet 720 may send an acknowledgement message back to the central computer 710 , indicating that the electrical outlet 720 has been disabled. If the central computer 710 does not receive the acknowledgement message within a certain period of time, the central computer 710 may resend the timed out event message to the electrical outlet 720 .
- the central computer 710 may send a power reset message 830 to the controllable electrical outlet 720 , causing the microcontroller 1010 to send another trigger signal 131 to the electrical switch 140 , causing the electrical switch 140 to reset to the closed (conductive) position 141 .
- the central computer 710 may send such a power reset message 830 after a second predefined time interval, measured from when the original timed-out event message 820 was sent.
- any of the other two controllable electrical outlets 720 were to be used (i.e., an electrical load were to be plugged in), then the example above would be repeated in the same manner for that electrical outlet 720 .
- a single central computer 710 may control a plurality of electrical outlets 720 .
- the messages sent over the electrical wiring 910 are low bandwidth messages. That is, the messages do not contain a large amount of information to be transmitted in a short period of time. However, in accordance with certain embodiments of the present invention, messages requiring larger bandwidths may be developed and sent over the electrical wiring 910 .
- controllable electrical outlets 720 may include the battery of FIG. 2 , the reversed polarity configuration of FIG. 3 , or the current sensor/electrical switch configuration of FIG. 4 . Other configurations are possible as well.
- FIG. 13 illustrates a schematic block diagram of a second embodiment of a controllable electrical outlet 1300 capable of being controlled via wireless communications.
- the controllable electrical outlet 1300 is similar to the controllable electrical outlet 720 of FIG. 10 except that, instead of including a carrier-current transceiver 1020 , the electrical outlet 1300 includes a wireless transceiver 1310 .
- the wireless transceiver 1310 provides the function of communicating with a central computer 1410 (see FIG. 14 ).
- the wireless transceiver 1310 is operatively connected to and controlled by the addressable microcontroller 1010 .
- FIG. 14 illustrates a schematic block diagram of an exemplary embodiment of a system 1400 for controlling the electrical outlet 1300 of FIG. 13 via wireless communications.
- the system 1400 includes a central computer 1410 having a wireless transceiver 1420 . Communication between the central computer 1410 and the controllable electrical outlet 1300 takes place wirelessly via the wireless transceivers 1420 and 1310 , instead of via the existing electrical wiring 1430 . Such wireless transceivers are well known in the art.
- the other internal circuitry 1440 illustrated in FIG. 14 may include the current sensor 120 , the electrical switch 140 , the power regulator 150 , and the addressable microcontroller 1010 as shown in FIG. 13 .
- the wireless transceiver 1310 may be powered by DC power from the power regulator 150 , for example.
- the wireless transceiver 1310 may be addressable.
- the method 1200 of FIG. 12 and the corresponding message protocols still apply for the system 1400 of FIG. 14 .
- FIG. 15 illustrates a schematic block diagram of a third exemplary embodiment of a controllable electrical outlet 1500 capable of being controlled via dedicated wired communications.
- the controllable electrical outlet 1500 is similar to the controllable electrical outlets 720 and 1300 of FIGS. 10 and 13 except that, instead of including a carrier-current transceiver 1020 or a wireless transceiver 1310 , the electrical outlet 1500 includes dedicated communication wiring 1510 operatively connected to the addressable microcontroller 1010 .
- the dedicated communication wiring 1510 may provide, for example, digital serial communication between the central computer 1610 (see FIG. 16 ) and the addressable microcontroller 1010 within the electrical outlet 1500 .
- FIG. 16 illustrates a schematic block diagram of an exemplary embodiment of a system 1600 for controlling the electrical outlet 1500 of FIG. 15 via dedicated wired communications.
- the system 1600 includes a central computer 1610 . Communication between the central computer 1610 and the controllable electrical outlet 1500 takes place via the dedicated communication wiring 1510 , instead of via the existing electrical wiring 1620 or any wireless transceivers.
- the other internal circuitry 1630 illustrated in FIG. 16 may include the current sensor 120 , the electrical switch 140 , and the power regulator 150 as shown in FIG. 15 .
- the method 1200 of FIG. 12 and the corresponding message protocols still apply for the system 1600 of FIG. 16 .
- the electrical switch 140 may be a dimmer-type switch (e.g., a variable resistor switch) which may be controlled by the central computer 710 via the addressable controller 1010 to deliver a partial electric current to the load 110 .
- a dimmer-type switch e.g., a variable resistor switch
- Such dimmer-type switches are well known in the art.
- the electrical outlet 720 may include the capability to relay other events (e.g., a GFCI event) to the central computer 710 in a manner similar to how, for example, a current sense event is relayed.
- a GFCI event e.g., a GFCI event
- the central computer 710 may interface to an external network such as, for example, the internet and be capable of sending messages (e.g., via email or text message) corresponding to certain electrical outlet events to, for example, a rescue assistance center, the police, a cell phone, a pager, etc.
- an external network such as, for example, the internet and be capable of sending messages (e.g., via email or text message) corresponding to certain electrical outlet events to, for example, a rescue assistance center, the police, a cell phone, a pager, etc.
- a controllable electrical outlet includes a current sensor, an electrical switch, and an addressable microcontroller.
- the current sensor senses the flow of current and a current sense event is reported from the electrical outlet to a central computer.
- the central computer provides timing and control of the electrical outlet.
- a timed-out event is communicated from the central computer to the electrical outlet triggering the electrical switch, opening the current path within the electrical outlet such that electrical current no longer flows to the electrical load. Communication between the central computer and an electrical outlet may occur, for example, via existing electrical wiring, wirelessly, or via dedicated communication wiring.
Abstract
Controllable electrical outlets and systems and methods for controlling and disabling the electrical outlets. A controllable electrical outlet includes a current sensor, an electrical switch, and a microcontroller. When an electrical load is plugged into the electrical outlet, the current sensor senses the flow of current and a current sense event is reported from the electrical outlet to a central computer. The central computer provides timing and control of the electrical outlet. When a predetermined elapsed time has passed, as measured by the central computer, a timed-out event is communicated from the central computer to the electrical outlet triggering the electrical switch, opening the current path within the electrical outlet such that electrical current no longer flows to the electrical load. Communication between the central computer and an electrical outlet may occur, for example, via existing electrical wiring, wirelessly, or via dedicated communication wiring.
Description
- This U.S. patent application is a divisional application of U.S. patent application Ser. No. 12/197,334 filed on Aug. 25, 2008, which is expressly incorporated herein by reference, and which is a continuation-in-part (CIP) of U.S. patent application Ser. No. 12/187,579, filed on Aug. 7, 2008, now U.S. Pat. No. 8,050,001, which is expressly incorporated herein by reference.
- Certain embodiments of the present invention relate to electrical outlets. More particularly, certain embodiments relate to electrical outlets or pluggable apparatus that may be automatically disabled as a safety feature.
- Standard electrical outlets may be found in homes, office buildings, and factories, for example. Such electrical outlets provide readily available electricity to those who need it, for example, for lamps, appliances, televisions, audio equipment, curling irons, etc. To provide electricity to an electrical outlet, electrical wiring is routed from an electrical panel to the electrical outlet, with possible intermediate routings to other electrical outlets or lights along the way. The electrical wiring includes a hot wire (typically a black wire or a blue wire) that brings electrical power to the electrical outlet from the electrical panel, and a neutral wire (typically a white wire) that returns power from the electrical outlet to the electrical panel. A third wire is often provided (typically a green wire) that serves as a grounding wire.
- When an electrical load (e.g., a lamp) is plugged into an electrical outlet, a closed circuit is completed between the hot wire and the neutral wire and electrical current flows between the electrical panel and the electrical outlet through the electrical load. In the United States, such electrical power is provided as an alternating current (AC) at about 120 Volts (i.e., 120 VAC) at a frequency of 60 Hz.
- External timers exist that may be plugged into an electrical outlet. Such external timers are often used to turn on a lamp at a particular time of day (e.g., 6:00 p.m.), and then turn off the lamp at another particular time of day (e.g., 12:00 midnight). Such external timers typically use power provided by the electrical outlet to operate and are always running (i.e., keeping time) as long as they are plugged in to the electrical outlet.
- Various safety features have been designed into electrical outlets such as, for example, ground-fault circuit interrupters (GFCI) which serve to protect people from electrical shock. However, sometimes a person may plug an electrical load (e.g., a hair curling iron) into an electrical outlet and end up forgetting about it, leaving the electrical load plugged in and drawing current, due to becoming distracted or because they may be suffering from short term memory loss, for example. In such circumstances, depending on the type of electrical load and any safety features it may or may not have, the electrical load could become a fire hazard or some other type of safety hazard.
- Further limitations and disadvantages of conventional, traditional, and proposed approaches will become apparent to one of skill in the art, through comparison of such approaches with the subject matter of the present application as set forth in the remainder of the present application with reference to the drawings.
- An embodiment of the present invention comprises an electrical outlet including a hot electrical terminal and a neutral electrical terminal. The electrical outlet further includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet. The electrical outlet also includes a carrier-current transceiver operatively connected to the hot electrical terminal and the neutral electrical terminal to receive and transmit messages over existing electrical wires. The electrical outlet further includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current. The electrical outlet also includes an addressable microcontroller operatively connected to the carrier-current transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the carrier-current transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the carrier-current transceiver to the electrical switch within the electrical outlet.
- The electrical outlet may further include a power regulator operatively connected between the hot electrical terminal and the neutral electrical terminal to convert AC electrical power to DC electrical power. The power regulator may further be operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide the DC electrical power thereto.
- As an alternative, the electrical outlet may also include a DC battery operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide DC electrical power thereto. The electrical outlet may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- Another embodiment of the present invention comprises an electrical outlet for providing AC electrical power to an electrical load. The electrical outlet has a hot electrical portion and a neutral electrical portion and is capable of having an electrical load plugged thereinbetween. The electrical outlet comprises a safety apparatus including a current sensor adapted to detect an electrical current flowing between the hot electrical portion and the neutral electrical portion in response to a current drawing load being plugged into the electrical outlet. The safety apparatus further includes a carrier-current transceiver operatively connected to the hot electrical portion and the neutral electrical portion to receive and transmit messages over existing electrical wires. The safety apparatus also includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current. The safety apparatus further includes an addressable microcontroller operatively connected to the carrier-current transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the carrier-current transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the carrier-current transceiver to the electrical switch within the electrical outlet.
- The safety apparatus may further include a power regulator operatively connected between the hot electrical portion and the neutral electrical portion to convert AC electrical power to DC electrical power. The power regulator may further be operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide the DC electrical power thereto.
- As an alternative, the safety apparatus may also include a DC battery operatively connected to at least one of the current sensor, the addressable microcontroller, and the electrical switch to provide DC electrical power thereto. The safety apparatus may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- A further embodiment of the present invention comprises an electrical outlet. The electrical outlet includes a hot electrical terminal and a neutral electrical terminal. The electrical outlet also includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet. The electrical outlet further includes a wireless transceiver to receive and transmit messages wirelessly. The electrical outlet also includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current. The electrical outlet further includes a microcontroller operatively connected to the wireless transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the wireless transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the wireless transceiver to the electrical switch within the electrical outlet.
- The electrical outlet may further include a power regulator operatively connected between the hot electrical terminal and the neutral electrical terminal to convert AC electrical power to DC electrical power. The power regulator may further be operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide the DC electrical power thereto.
- As an alternative, the electrical outlet may also include a DC battery operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide DC electrical power thereto. The electrical outlet may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- Another embodiment of the present invention comprises an electrical outlet for providing AC electrical power to an electrical load. The electrical outlet has a hot electrical portion and a neutral electrical portion and is capable of having an electrical load plugged thereinbetween. The electrical outlet comprises a safety apparatus including a current sensor adapted to detect an electrical current flowing between the hot electrical portion and the neutral electrical portion in response to a current drawing load being plugged into the electrical outlet. The safety apparatus further includes a wireless transceiver to receive and transmit messages wirelessly. The safety apparatus also includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current. The safety apparatus further includes a microcontroller operatively connected to the wireless transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the wireless transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the wireless transceiver to the electrical switch within the electrical outlet.
- The safety apparatus may further include a power regulator operatively connected between the hot electrical portion and the neutral electrical portion to convert AC electrical power to DC electrical power. The power regulator may further be operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide the DC electrical power thereto.
- As an alternative, the safety apparatus may also include a DC battery operatively connected to at least one of the current sensor, the microcontroller, the wireless transceiver, and the electrical switch to provide DC electrical power thereto. The safety apparatus may further include a reset button operatively connected to the electrical switch to facilitate closing of the electrical switch.
- A further embodiment of the present invention comprises a system including existing electrical wires including a hot electrical wire and a neutral electrical wire for providing electrical power. The system also includes a first carrier-current transceiver operatively connected to the existing electrical wires. The system further includes a central computer operatively connected to the first carrier-current transceiver to send and receive messages over the existing electrical wires via said first carrier-current transceiver. The system also includes at least one addressable electrical outlet operatively connected to the existing electrical wires.
- The addressable electrical outlet includes a hot electrical terminal and a neutral electrical terminal. The addressable electrical outlet further includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet. The addressable electrical outlet also includes a second carrier-current transceiver operatively connected to the hot electrical terminal and the neutral electrical terminal to receive and send messages over the existing electrical wires. The addressable electrical outlet further includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current. The addressable electrical outlet also includes a microcontroller operatively connected to the second carrier-current transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the second carrier-current transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the second carrier-current transceiver to the electrical switch within the electrical outlet. The system may further include a display panel operatively connected to said central computer to display a status of the at least one addressable electrical outlet.
- Another embodiment of the present invention comprises a system including existing electrical wires including a hot electrical wire and a neutral electrical wire for providing electrical power. The system further includes a central computer to provide timing and control capability and having a first wireless transceiver to receive and transmit messages wirelessly. The system also includes at least one addressable electrical outlet operatively connected to the existing electrical wires.
- The at least one addressable electrical outlet includes a hot electrical terminal and a neutral electrical terminal. The addressable electrical outlet further includes a current sensor adapted to detect an electrical current flowing between the hot electrical terminal and the neutral electrical terminal in response to a current drawing load being plugged into the electrical outlet. The addressable electrical outlet also includes a second wireless transceiver to receive and transmit messages wirelessly. The addressable electrical outlet further includes an electrical switch capable of being automatically triggered to switch from a closed (conducting) position to an open (non-conducting) position, thereby stopping the flowing electrical current. The addressable electrical outlet also includes a microcontroller operatively connected to the second wireless transceiver, the current sensor, and the electrical switch to facilitate communication of a current sense event from the current sensor to the second wireless transceiver within the electrical outlet, and to facilitate communication of a timed-out event from the second wireless transceiver to the electrical switch within the electrical outlet. The system may further include a display panel operatively connected to the central computer to display a status of the at least one addressable electrical outlet.
- These and other novel features of the subject matter of the present application, as well as details of illustrated embodiments thereof, will be more fully understood from the following description and drawings.
-
FIG. 1 illustrates a schematic block diagram of a first exemplary embodiment of an electrical outlet; -
FIG. 2 illustrates a schematic block diagram of a second exemplary embodiment of an electrical outlet; -
FIG. 3 illustrates a schematic block diagram of a third exemplary embodiment of an electrical outlet; -
FIG. 4 illustrates a schematic block diagram of a fourth exemplary embodiment of an electrical outlet; -
FIG. 5 illustrates a flowchart of an exemplary embodiment of a method of electrically disconnecting an electrical outlet from an external electrical load; -
FIG. 6 illustrates a schematic block diagram of a device that may be plugged into a standard electrical outlet to provide the functionality of electrically disconnecting an external electrical load from the standard electrical outlet; -
FIG. 7 illustrates a functional block diagram of an exemplary embodiment of a system for controlling a plurality of electrical outlets; -
FIG. 8 illustrates a functional block diagram of an exemplary embodiment of a central computer communicating with a controllable electrical outlet; -
FIG. 9 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling a plurality of electrical outlets via existing electrical wiring; -
FIG. 10 illustrates a schematic block diagram of a first embodiment of a controllable electrical outlet capable of being controlled via existing electrical wiring; -
FIG. 11 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling the electrical outlet ofFIG. 10 via existing electrical wiring; -
FIG. 12 illustrates a flowchart of an exemplary embodiment of a method for controlling an electrical outlet; -
FIG. 13 illustrates a schematic block diagram of a second embodiment of a controllable electrical outlet capable of being controlled via wireless communications; -
FIG. 14 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling the electrical outlet ofFIG. 13 via wireless communications; -
FIG. 15 illustrates a schematic block diagram of a third exemplary embodiment of a controllable electrical outlet capable of being controlled via dedicated wired communications; and -
FIG. 16 illustrates a schematic block diagram of an exemplary embodiment of a system for controlling the electrical outlet ofFIG. 15 via dedicated wired communications. -
FIG. 1 illustrates a schematic block diagram of a first exemplary embodiment of anelectrical outlet 100. Theelectrical outlet 100 includes a “hot” portion orside 101 and a “neutral” portion orside 102. Electrical power is brought in to thehot side 101 via a hot wire (typically a black wire or a blue wire) from, for example, an electrical panel. The electrical power is brought out of theneutral side 102 of theelectrical outlet 100 via a neutral wire (typically a white wire) that returns power from theelectrical outlet 100 to, for example, the electrical panel. A third wire is often provided (typically a green wire) that serves as a grounding wire and may be connected to a grounding terminal of theelectrical outlet 100, if such a grounding terminal (not shown) is provided. - An
electrical load 110 may be plugged intoprongs electrical outlet 100 in order to provide electrical power to theelectrical load 110. Theelectrical load 110 is not part of theelectrical outlet 100, however.Prong 111 is connected to thehot side 101 andprong 112 is connected to theneutral side 102. When anelectrical load 110 is plugged into theprongs electrical outlet 100, forming a closed circuit path, electric current flows between thehot side 101 and theneutral side 102 through theelectrical load 110. For example, the electrical load may be a hair dryer, a hair curling iron, an electrical appliance, or some other type of electrical load. - The
electrical outlet 100 also includes acurrent sensor 120, acounter 130, and anelectrical switch 140. As shown inFIG. 1 , thecurrent sensor 120 is in the current path on thehot side 101 of theelectrical outlet 100. Thecurrent sensor 120 senses when electric current flows through the electric outlet 100 (because of the connected load 110) and outputs an enablingsignal 121 to thecounter 130, causing thecounter 130 to start counting over a preset time interval. When thecounter 130 is finished counting over the preset time interval, the counter outputs a triggering or trippingsignal 131 to theelectrical switch 140 which is also in the current path on thehot side 101 of theelectrical outlet 100. During normal operation, theelectrical switch 140 is in a closed (i.e., conducting)position 141, allowing electric current to flow through theelectrical outlet 100 and theload 110 until theelectrical switch 140 is tripped by thetrigger signal 131. When tripped by thetrigger signal 131, theelectrical switch 140 opens to the opened (non-conducting)position 142, preventing current flow through theelectrical outlet 100 and, therefore, through theelectrical load 110. - In accordance with an embodiment of the present invention, the
counter 130 may be a digital counter implemented on an integrated circuit chip which is well known in the art. Other types of counters or timing circuits may be possible as well. Thecurrent sensor 120 may be, for example, a current transformer based device, a Hall effect based device, a magnetoresistive effect based device, or a resistor based device which are all well known in the art and capable of sensing AC current. Other types of current sensors may be possible as well. Theelectrical switch 140 may be a triggerable or controllable single pole single throw (SPST) power switch of any of various types which are well known in the art. In accordance with an embodiment of the present invention, theelectrical switch 140 is manually resettable from theopen position 142 to theclosed position 141 via areset button 145 of, for example, the push-button type which are well known in the art. Other types of reset mechanisms are possible as well. - The
current sensor 120, thecounter 130, and theelectrical switch 140 may each be discrete devices and may all be mounted on a printed circuit board (PCB), for example, within theelectrical outlet 100. As an alternative, any or all of thedevices current sensor 120 and thecounter 130 may each be integrated into a single integrated circuit device which may be mounted on a PCB. - Typically, the
devices devices electrical outlet 100 may include apower regulator 150 operatively connected between thehot side 101 and theneutral side 102 of theelectrical outlet 100 and capable of converting AC electrical power to DC electrical power VDD with respect to a DC ground potential GND, as shown inFIG. 1 . The DC electrical power VDD and DC ground potential GND provided by thepower regulator 150 may be routed to thevarious devices power regulator 150 may provide two or more levels of DC electrical power (e.g., 5 VDC and 12 VDC). -
FIG. 2 illustrates a schematic block diagram of a second exemplary embodiment of anelectrical outlet 200. Theelectrical outlet 200 is identical to theelectrical outlet 100 ofFIG. 1 except that, instead of apower regulator 150, abattery 210 is provided which supplies DC electrical power VDD with respect to a DC ground potential GND. Again, the DC electrical power may be used by thecurrent sensor 120, thecounter 130, and/or theelectrical switch 140. In accordance with an alternative embodiment of the present invention, an electrical outlet may include both apower regulator 150 and at least onebattery 210. Thepower regulator 150 may power one subset of the internal devices of the electrical outlet and thebattery 210 may power a second subset of the internal devices of the electrical outlet. For example, thebattery 210 may power thecurrent sensor 120 and thecounter 130, while thepower regulator 150 may power theelectrical switch 140. -
FIG. 3 illustrates a schematic block diagram of a third exemplary embodiment of anelectrical outlet 300. Theelectrical outlet 300 is identical to theelectrical outlet 100 ofFIG. 1 except that thehot side 101 and theneutral side 102 are reversed. That is, thecurrent sensor 120 and theelectrical switch 140 are in the neutral side path of theelectrical outlet 300 instead of the hot side path. Such aconfiguration 300 may work equally as well as the configuration ofFIG. 1 . - Similarly,
FIG. 4 illustrates a schematic block diagram of a fourth exemplary embodiment of anelectrical outlet 400. In this embodiment, theelectrical switch 140 is on thehot side 101 of theelectrical outlet 400, however, thecurrent sensor 120 is on theneutral side 102 of theelectrical outlet 400. Again, such aconfiguration 400 may work equally as well as the configuration ofFIG. 1 or the configuration ofFIG. 3 . Other electrical outlet configurations having acurrent sensor 120, acounter 130, and anelectrical switch 140 may be possible as well, in accordance with various other embodiments of the present invention. -
FIG. 5 illustrates a flowchart of an exemplary embodiment of amethod 500 of electrically disconnecting an electrical outlet from an external electrical load. Instep 510, an electrical load that is plugged in to an electrical outlet is sensed. Instep 520, a preset time interval begins to elapse (e.g., a counter may be enabled) in response to the plugged in electrical load being sensed. If the preset time interval has elapsed (e.g., see step 525) then, instep 530, a conductive path within the electrical outlet is opened in response to reaching the end of the preset time interval, thereby stopping the flow of electrical current from the electrical outlet to the electrical load. Instep 540, themethod 500 may further include re-closing the open conductive path within the electrical outlet by manually activating a reset control (e.g., a push-type reset button) on an external portion of the electrical outlet. If the electrical load is still plugged into the electrical outlet, the electrical outlet will again, instep 510, sense the load and the process will start again. - The
method 500 may further include converting AC electrical power to DC electrical power within the electrical outlet and providing the DC electrical power to circuitry within the electrical outlet. Themethod 500 may also include providing DC electrical power to circuitry within the electrical outlet independent of any AC electrical power (e.g., via a battery). - As an example, referring to
FIG. 1 , a user may plug a curling iron (as an electrical load 110) into theprongs electrical outlet 100 in anticipation of using the curling iron after it heats up, but then forgets about it. With one of today's standard outlets (and assuming the curling iron does not have an automatic shut-off feature), the curling iron would continue to draw current from the electrical outlet and possibly continue to heat up. However, with theelectrical outlet 100 ofFIG. 1 , after a preset time interval (starting from the time the curling iron is plugged in and begins drawing current), theelectrical switch 140 will open and prevent electrical current from flowing to the curling iron. As a practical matter, the preset time interval may be, for example, ten minutes. The user may come back later (e.g., after the ten minutes) and press thereset button 145 on theelectrical outlet 100 to close theelectrical switch 140, allowing the curling iron to begin heating up once again. As a result, thecurrent sensor 120, thecounter 130, and theelectrical switch 140 serve as a safety apparatus within theelectrical outlet 100. Thereset button 145 or some other visible portion of theelectrical outlet 100 may be fitted with a light-emitting diode (LED), or some other type of indicator. The LED is turned on (emits light) when theelectrical switch 140 is in theopen position 142, indicating to the user that theelectrical outlet 100 is to be reset. - As a further example, referring to
FIG. 1 , a user may plug a waffle iron (as an electrical load 110) into theprongs electrical outlet 100 in anticipation of making waffles. The user may leave the kitchen where the waffle iron is plugged in and the waffle iron may accidentally drop closed, causing the waffle iron to draw current and heat up. With one of today's standard outlets (and assuming the waffle iron does not have an automatic shut-off feature), the waffle iron would continue to draw current from the electrical outlet and possibly continue to heat up. However, with theelectrical outlet 100 ofFIG. 1 , after a preset time interval (starting from the time the waffle iron closes and begins drawing current), theelectrical switch 140 will open and prevent electrical current from flowing to the waffle iron. As a practical matter, the preset time interval may be, for example, one minute. The user may come back later (e.g., after the one minute) and press thereset button 145 on theelectrical outlet 100 to close theelectrical switch 140, allowing the waffle iron to begin heating up once again. Again, thecurrent sensor 120, thecounter 130, and theelectrical switch 140 serve as a safety apparatus within theelectrical outlet 100. - Such electrical outlets, as described herein in accordance with various embodiments of the present invention, may be judicially placed within a household. For example, bathrooms and kitchens may be places within a household where it makes the most sense to install such electrical outlets since these rooms are where electrical loads such as curling irons, blow dryers, waffle irons, and other appliances are most often used. Furthermore, college dorm rooms and nursing homes may be places where such electrical outlets would be of great benefit. Also, within a factory, such electrical outlets may be very practical, allowing various types of power tools or equipment to time out and turn off after a certain preset period of time.
- In accordance with an alternative embodiment of the present invention, the preset period of time may be selectable or adjustable. For example, an electrical outlet may be configured with DIP (dual inline package) switches or some other type of selector or user interface (e.g., up/down buttons) operatively connected to the
counter 130, allowing the preset time interval to be selected. Such selectability would allow the electrical outlet to be more flexible. For example, an electrician may install an electrical outlet in a bathroom and set the time interval to seven minutes. The electrician may install another electrical outlet of the same type in a kitchen and set the time interval to two minutes. - Another alternative embodiment of the present invention provides the functionality of a current sensor, a counter, and an electrical switch as described herein, but in a device (pluggable apparatus) that is separate from an electrical outlet and which may be plugged into a standard electrical outlet.
FIG. 6 illustrates a schematic block diagram of a device 600 (a pluggable apparatus) that may be plugged into a standard electrical outlet to provide the functionality of electrically disconnecting an externalelectrical load 610 from the standard electrical outlet. Thedevice 600 is very similar to thedevice 100 ofFIG. 1 except that thedevice 600 is not an electrical outlet as such that is mounted, for example, within a wall and is wired to an electrical panel. Instead, thedevice 600 is an external device that may be plugged into a standard electrical outlet and yet provide the same functionality as theelectrical outlet 100 ofFIG. 1 . - The
device 600 includes a “hot” portion orside 601 and a “neutral” portion orside 602. Thehot side 601 plugs into a hot prong of an electrical outlet, and theneutral side 602 plugs into a neutral prong of an electrical outlet. A third portion may be provided that serves as a grounding portion and may be plugged into a grounding plug of an electrical outlet. - An
electrical load 610 may be plugged intoprongs device 600 in order to provide electrical power to theelectrical load 610. Theelectrical load 610 is not part of the electrical outlet or thedevice 600, however.Prong 611 is connected to thehot side 601 andprong 612 is connected to theneutral side 602. When anelectrical load 610 is plugged into theprongs device 600, forming a closed circuit path, electric current flows between thehot side 601 and theneutral side 602 through theelectrical load 610. For example, the electrical load may be a hair dryer, a hair curling iron, an electrical appliance, or some other type of electrical load. - The
device 600 also includes a current sensor 620, acounter 630, and anelectrical switch 640. As shown inFIG. 6 , the current sensor 620 is in the current path on thehot side 601 of thedevice 600. The current sensor 620 senses when electric current flows through the device 600 (because of the connected load 610) and outputs an enablingsignal 621 to thecounter 630, causing thecounter 630 to start counting over a preset time interval. When thecounter 630 is finished counting over the preset time interval, the counter outputs a triggering or trippingsignal 631 to theelectrical switch 640 which is also in the current path on thehot side 601 of thedevice 600. During normal operation, theelectrical switch 640 is in a closed (i.e., conducting)position 641, allowing electric current to flow from the electrical outlet through thedevice 600 and theload 610 until theelectrical switch 640 is tripped by thetrigger signal 631. When tripped by thetrigger signal 631, theelectrical switch 640 opens to the opened (non-conducting) position 642, preventing current flow through thedevice 600 and, therefore, through theelectrical load 610. - In accordance with an embodiment of the present invention, the
counter 630 may be a digital counter implemented on an integrated circuit chip which is well known in the art. Other types of counters or timing circuits may be possible as well. The current sensor 620 may be, for example, a current transformer based device, a Hall effect based device, a magnetoresistive effect based device, or a resistor based device which are all well known in the art and capable of sensing AC current. Other types of current sensors may be possible as well. Theelectrical switch 640 may be a triggerable or controllable single pole single throw (SPST) power switch of any of various types which are well known in the art. In accordance with an embodiment of the present invention, theelectrical switch 640 is manually resettable from the open position 642 to theclosed position 641 via areset button 645 of, for example, the push-button type which are well known in the art. Other types of reset mechanisms are possible as well. - The current sensor 620, the
counter 630, and theelectrical switch 640 may each be discrete devices and may all be mounted on a printed circuit board (PCB), for example, within thedevice 600. As an alternative, any or all of theelements counter 630 may each be integrated into a single integrated circuit device which may be mounted on a PCB. - Typically, the
elements elements device 600 may include apower regulator 650 operatively connected between thehot side 601 and theneutral side 602 of thedevice 600 and capable of converting AC electrical power to DC electrical power VDD with respect to a DC ground potential GND, as shown inFIG. 6 . The DC electrical power VDD and DC ground potential GND provided by thepower regulator 650 may be routed to thevarious elements power regulator 650 may provide two or more levels of DC electrical power (e.g., 5 VDC and 12 VDC). - In accordance with various alternative embodiments of the present invention, the
external device 600 may be configured and function similarly to the configurations shown inFIGS. 2-4 herein. Other configurations are possible as well. -
FIG. 7 illustrates a functional block diagram of an exemplary embodiment of asystem 700 for controlling a plurality of electrical outlets. At the heart of thesystem 700 is acentral computer 710. Thecentral computer 710 may be, for example, a standard personal computer (PC), a workstation, a server, or a customized microprocessor based design. Thecentral computer 710 operatively interfaces to a plurality of controllableelectrical outlets 720. The interfaces between thecentral computer 710 and the controllableelectrical outlets 720 may be via existing electrical wiring, dedicated communication wiring, or wireless techniques as are described in detail later herein. -
FIG. 8 illustrates a functional block diagram of an exemplary embodiment of thecentral computer 710 ofFIG. 7 communicating with a controllableelectrical outlet 720. In accordance with an embodiment of the present invention, communication between thecentral computer 710 and any controllableelectrical outlet 720 includes the transmission of a currentsense event message 810 from the controllableelectrical outlet 720 to thecentral computer 710, a timed-outevent message 820 from thecentral computer 710 to the controllableelectrical outlet 720 and, optionally, a power reset message 830 from thecentral computer 710 to the controllableelectrical outlet 720. Such communications are described in more detail later herein. As an option, thesystem 700 may include astatus display panel 840 operatively connected to thecentral computer 710 and used to display a status (e.g., closed, open, in use for x more minutes, etc.) of the various controllableelectrical outlets 720. -
FIG. 9 illustrates a schematic block diagram of an exemplary embodiment of asystem 900 for controlling a plurality ofelectrical outlets 720 via existingelectrical wiring 910. Not only does theelectrical wiring 910 provide electrical power to the controllableelectrical outlets 720, theelectrical wiring 910 is also used to communicate messages between thecentral computer 710 and the electrical outlets as described forFIG. 8 . By using existing electrical wiring as the communication path, thecentral computer 710 and the controllableelectrical outlets 720 as described herein may be installed into homes, factories, and other facilities without having to run any new communication wires between them. -
FIG. 10 illustrates a schematic block diagram of a first embodiment of a controllableelectrical outlet 720 capable of being controlled via existingelectrical wiring 910 as shown inFIG. 9 . Similar to theelectrical outlet 100 shown inFIG. 1 , the controllableelectrical outlet 720 includes acurrent sensor 120, anelectrical switch 140, and apower regulator 150. However, instead of acounter 130, the controllableelectrical outlet 720 includes anaddressable microcontroller 1010. The controllableelectrical outlet 720 also includes a carrier-current transceiver 1020. Themicrocontroller 1010 provided control of the carrier-current transceiver 1020 and also operatively interfaces to thecurrent sensor 120 and theelectrical switch 140. - The carrier-
current transceiver 1020 is a device that is operatively connected to the hot and neutral terminals orportions electrical outlet 720 and is capable of sending and receiving messages over the existingelectrical wiring 910. Thehot terminal 101 is connected to thehot wire 901 of the existingelectrical wiring 910 and theneutral terminal 102 is connected to theneutral wire 902 of the existingelectrical wiring 910 within the controllableelectrical outlet 720. Such carrier-current transceivers 1020 are well known in the art and may be used to send and receive low bandwidth and/or high bandwidth messages. The National Semiconductor LM1893 and LM2893 devices are examples of carrier-current transceivers. Such carrier-current transceivers use electrical wiring (power mains) to transfer information between remote locations (e.g., between a central computer and a plurality of controllable electrical outlets as described herein, in accordance with various embodiments of the present invention). -
FIG. 11 illustrates a schematic block diagram of an exemplary embodiment of asystem 1100 for controlling theelectrical outlet 720 ofFIG. 10 via existingelectrical wiring 910. The controllableelectrical outlet 720 includes a first carrier-current transceiver 1020 as well as other internal circuitry 1120 (e.g.,current sensor 120,electrical switch 140,power regulator 150, and addressable microcontroller 1010). The first carrier-current transceiver 1020 is operatively connected to the existingelectrical wiring 910 as illustrated inFIG. 11 . Furthermore, thesystem 1100 includes thecentral computer 710 and a second carrier-current transceiver 1110. The second carrier-current transceiver 1110 is also operatively connected to the existingelectrical wiring 910 as illustrated inFIG. 11 . In accordance with an alternative embodiment of the present invention, the carrier-current transceiver 1110 may be an integral part of thecentral computer 710. - Even though electrical power (e.g., 120 VAC) is applied to the
electrical wiring 910 to provide electrical power to the controllableelectrical outlet 720, the carrier-current transceivers are able to transmit information onto and receive information off of theelectrical wiring 910. Referring again toFIG. 10 , the first carrier-current transceiver 1020 within the controllableelectrical outlet 720 is also operatively connected to theaddressable microcontroller 1010. Theaddressable microcontroller 1010 may be, for example, a microprocessor or a microprocessor-based device capable of interfacing with and communicating with the first carrier-current transceiver 1020. Themicrocontroller 1010 may be configured from other electronic components other than a microprocessor, in accordance with other alternative embodiments of the present invention. Themicrocontroller 1010 is addressable, meaning that messages being sent over theelectrical wiring 910 may be identified as intended for a particular electrical outlet by including an identifying address (e.g., a digital address) in the sent message which corresponds to a predefined address of theelectrical outlet 720. - For example, when a message (e.g., a timed-out event message) is received by first carrier-
current transceivers 1020 within multiple controllableelectrical outlets 720 from thecentral computer 710 via the second carrier-current transceiver 1110 and theelectrical wiring 910, theaddressable microcontroller 1010 within a particularelectrical outlet 720 will accept the message as being intended for that particularelectrical outlet 720 only if the address in the message matches the address of that particularelectrical outlet 720, as determined by theaddressable microcontroller 1010. In this way, only the intendedelectrical outlet 720 acts upon the message. -
FIG. 12 illustrates a flowchart of an exemplary embodiment of amethod 1200 for controlling an addressableelectrical outlet 720. Instep 1210, sense an electrical load plugged into an electrical outlet. Instep 1220, report the sensing of the electrical load (e.g., via a current sense event message) to a central computer. Instep 1230, start a timing routine within the central computer in response to reporting the sensing. When the timing routine is complete (predetermined time interval has elapsed) as determined instep 1240 then, in step 1250, the central computer reports the completion of the timing routine (e.g., via a timed-out event message) to the electrical outlet. Instep 1260, open a conductive path within the electrical outlet in response to the reporting of the completion of the timing routine to stop the flow of electric current from the electrical outlet to the electrical load. Instep 1270, the opened conductive path may be re-closed, allowing current to once again flow to the electrical load and starting the sensing and timing process over again. - As an example, referring to
FIGS. 8-11 , a user in a dorm room plugs a hot plate (electrical load 110) into one of the three controllableelectrical outlets 720, shown inFIG. 9 , in order to heat a can of soup. Thecurrent sensor 120 within theelectrical outlet 720 immediately senses a flow of current from theelectrical outlet 720 to the hot plate and sends acurrent sense signal 121 to theaddressable microcontroller 1010, which thecurrent sensor 120 is operatively connected to, within theelectrical outlet 720. Upon receiving thecurrent sense signal 121, theaddressable microcontroller 1010 sends a currentsense event message 810 to the carrier-current transceiver 1020, which the microcontroller is operatively connected to, within theelectrical outlet 720. Themessage 810 includes the unique identifying address of theelectrical outlet 720. - The carrier-
current transceiver 1020 transforms themessage 810 for transmission over theelectrical wiring 910 and sends the message over theelectrical wiring 910. The carrier-current transceiver 1110 receives themessage 810 off of theelectrical wiring 910, transforms the message, and forwards the message to thecentral computer 710. Thecentral computer 710 processes themessage 810 and starts a timing routine within thecentral computer 710. The timing routing essentially counts over a predefined time interval. - When the counting routine is finished (i.e., the predefined time interval has elapsed after, for example, five minutes), the
central computer 710 sends a timed-outevent message 820 out onto theelectrical wiring 910 via the carrier-current transceiver 1110. The timed-outevent message 820 includes the address of theelectrical outlet 720 which originally sent the currentsense event message 810. Each of the plurality of controllableelectrical outlets 720 receives the timed-outevent message 820 at its respective carrier-current transceiver 1020 and transforms and passes themessage 820 onto its respectiveaddressable microcontroller 1010. - However, only the
microcontroller 1010 of theelectrical outlet 720 corresponding to the sent address accepts the timed-outevent message 820. Themicrocontroller 1010 processes themessage 820 and outputs atrigger signal 131 to theelectrical switch 140 in response to themessage 820, causing theelectrical switch 140 to open (e.g., become non-conductive in the open position 142), thereby stopping the flow of electric current from theelectrical outlet 720 to the hot plate (electrical load 110). In this manner, if the user has left the dorm room and/or forgotten about the hot plate and the can of soup, the hot plate will be turned off after, for example, five minutes. - In accordance with an embodiment of the present invention, the
electrical outlet 720 may send an acknowledgement message back to thecentral computer 710, indicating that theelectrical outlet 720 has been disabled. If thecentral computer 710 does not receive the acknowledgement message within a certain period of time, thecentral computer 710 may resend the timed out event message to theelectrical outlet 720. - Subsequently, the user may then activate the
reset button 145 to re-engage theelectrical switch 140 to its closed (conductive)position 141, thus starting the reporting and timing process over again. As an alternative, thecentral computer 710 may send a power reset message 830 to the controllableelectrical outlet 720, causing themicrocontroller 1010 to send anothertrigger signal 131 to theelectrical switch 140, causing theelectrical switch 140 to reset to the closed (conductive)position 141. For example, thecentral computer 710 may send such a power reset message 830 after a second predefined time interval, measured from when the original timed-outevent message 820 was sent. - If any of the other two controllable
electrical outlets 720 were to be used (i.e., an electrical load were to be plugged in), then the example above would be repeated in the same manner for thatelectrical outlet 720. In this manner, a singlecentral computer 710 may control a plurality ofelectrical outlets 720. The messages sent over theelectrical wiring 910, as described herein, are low bandwidth messages. That is, the messages do not contain a large amount of information to be transmitted in a short period of time. However, in accordance with certain embodiments of the present invention, messages requiring larger bandwidths may be developed and sent over theelectrical wiring 910. - In accordance with other alternative embodiments of the present invention, the controllable
electrical outlets 720 may include the battery ofFIG. 2 , the reversed polarity configuration ofFIG. 3 , or the current sensor/electrical switch configuration ofFIG. 4 . Other configurations are possible as well. -
FIG. 13 illustrates a schematic block diagram of a second embodiment of a controllableelectrical outlet 1300 capable of being controlled via wireless communications. The controllableelectrical outlet 1300 is similar to the controllableelectrical outlet 720 ofFIG. 10 except that, instead of including a carrier-current transceiver 1020, theelectrical outlet 1300 includes awireless transceiver 1310. Thewireless transceiver 1310 provides the function of communicating with a central computer 1410 (seeFIG. 14 ). Thewireless transceiver 1310 is operatively connected to and controlled by theaddressable microcontroller 1010. -
FIG. 14 illustrates a schematic block diagram of an exemplary embodiment of asystem 1400 for controlling theelectrical outlet 1300 ofFIG. 13 via wireless communications. Thesystem 1400 includes a central computer 1410 having awireless transceiver 1420. Communication between the central computer 1410 and the controllableelectrical outlet 1300 takes place wirelessly via thewireless transceivers electrical wiring 1430. Such wireless transceivers are well known in the art. The otherinternal circuitry 1440 illustrated inFIG. 14 may include thecurrent sensor 120, theelectrical switch 140, thepower regulator 150, and theaddressable microcontroller 1010 as shown inFIG. 13 . Thewireless transceiver 1310 may be powered by DC power from thepower regulator 150, for example. As an alternative, instead of themicrocontroller 1010 being addressable, thewireless transceiver 1310 may be addressable. Themethod 1200 ofFIG. 12 and the corresponding message protocols still apply for thesystem 1400 ofFIG. 14 . -
FIG. 15 illustrates a schematic block diagram of a third exemplary embodiment of a controllableelectrical outlet 1500 capable of being controlled via dedicated wired communications. The controllableelectrical outlet 1500 is similar to the controllableelectrical outlets FIGS. 10 and 13 except that, instead of including a carrier-current transceiver 1020 or awireless transceiver 1310, theelectrical outlet 1500 includesdedicated communication wiring 1510 operatively connected to theaddressable microcontroller 1010. Thededicated communication wiring 1510 may provide, for example, digital serial communication between the central computer 1610 (seeFIG. 16 ) and theaddressable microcontroller 1010 within theelectrical outlet 1500. -
FIG. 16 illustrates a schematic block diagram of an exemplary embodiment of asystem 1600 for controlling theelectrical outlet 1500 ofFIG. 15 via dedicated wired communications. Thesystem 1600 includes acentral computer 1610. Communication between thecentral computer 1610 and the controllableelectrical outlet 1500 takes place via thededicated communication wiring 1510, instead of via the existingelectrical wiring 1620 or any wireless transceivers. The otherinternal circuitry 1630 illustrated inFIG. 16 may include thecurrent sensor 120, theelectrical switch 140, and thepower regulator 150 as shown inFIG. 15 . Themethod 1200 ofFIG. 12 and the corresponding message protocols still apply for thesystem 1600 ofFIG. 16 . - In accordance with an embodiment of the present invention, the
electrical switch 140 may be a dimmer-type switch (e.g., a variable resistor switch) which may be controlled by thecentral computer 710 via theaddressable controller 1010 to deliver a partial electric current to theload 110. Such dimmer-type switches are well known in the art. - In accordance with another embodiment of the present invention, the
electrical outlet 720 may include the capability to relay other events (e.g., a GFCI event) to thecentral computer 710 in a manner similar to how, for example, a current sense event is relayed. - In accordance with a further embodiment of the present invention, the
central computer 710 may interface to an external network such as, for example, the internet and be capable of sending messages (e.g., via email or text message) corresponding to certain electrical outlet events to, for example, a rescue assistance center, the police, a cell phone, a pager, etc. - In summary, controllable electrical outlets and systems and methods for controlling and disabling the electrical outlets are disclosed. A controllable electrical outlet includes a current sensor, an electrical switch, and an addressable microcontroller. When an electrical load is plugged into the electrical outlet, the current sensor senses the flow of current and a current sense event is reported from the electrical outlet to a central computer. The central computer provides timing and control of the electrical outlet. When a predetermined elapsed time has passed, as measured by the central computer, a timed-out event is communicated from the central computer to the electrical outlet triggering the electrical switch, opening the current path within the electrical outlet such that electrical current no longer flows to the electrical load. Communication between the central computer and an electrical outlet may occur, for example, via existing electrical wiring, wirelessly, or via dedicated communication wiring.
- While the claimed subject matter of the present application has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the claimed subject matter. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the claimed subject matter without departing from its scope. Therefore, it is intended that the claimed subject matter not be limited to the particular embodiment disclosed, but that the claimed subject matter will include all embodiments falling within the scope of the appended claims.
Claims (24)
1. An electrical outlet comprising:
a hot electrical terminal;
a neutral electrical terminal;
a current sensor adapted to detect an electrical current flowing between said hot electrical terminal and said neutral electrical terminal in response to a current drawing load being plugged into said electrical outlet;
a carrier-current transceiver operatively connected to said hot electrical terminal and said neutral electrical terminal to receive and transmit messages over existing electrical wires;
an electrical switch capable of being automatically triggered to switch from a closed position to an open position, thereby stopping said flowing electrical current; and
an addressable microcontroller operatively connected to said carrier-current transceiver, said current sensor, and said electrical switch to facilitate communication of a current sense event from said current sensor to said carrier-current transceiver within said electrical outlet, and to facilitate communication of a timed-out event from said carrier-current transceiver to said electrical switch within said electrical outlet.
2. The electrical outlet of claim 1 further comprising a power regulator operatively connected between said hot electrical terminal and said neutral electrical terminal to convert AC electrical power to DC electrical power.
3. The electrical outlet of claim 2 wherein said power regulator is further operatively connected to at least one of said current sensor, said addressable microcontroller, and said electrical switch to provide said DC electrical power thereto.
4. The electrical outlet of claim 1 further comprising a DC battery operatively connected to at least one of said current sensor, said addressable microcontroller, and said electrical switch to provide DC electrical power thereto.
5. The electrical outlet of claim 1 further comprising a reset button operatively connected to said electrical switch to facilitate closing of said electrical switch.
6. In an electrical outlet for providing AC electrical power to an electrical load, the electrical outlet having a hot electrical portion and a neutral electrical portion and being capable of having an electrical load plugged thereinbetween, the improvement comprising a safety apparatus comprising:
a current sensor adapted to detect an electrical current flowing between said hot electrical portion and said neutral electrical portion in response to a current drawing load being plugged into said electrical outlet;
a carrier-current transceiver operatively connected to said hot electrical portion and said neutral electrical portion to receive and transmit messages over existing electrical wires;
an electrical switch capable of being automatically triggered to switch from a closed position to an open position, thereby stopping said flowing electrical current; and
an addressable microcontroller operatively connected to said carrier-current transceiver, said current sensor, and said electrical switch to facilitate communication of a current sense event from said current sensor to said carrier-current transceiver within said electrical outlet, and to facilitate communication of a timed-out event from said carrier-current transceiver to said electrical switch within said electrical outlet.
7. The safety apparatus of claim 6 further comprising a power regulator operatively connected between said hot electrical portion and said neutral electrical portion to convert AC electrical power to DC electrical power.
8. The safety apparatus of claim 7 wherein said power regulator is further operatively connected to at least one of said current sensor, said addressable microcontroller, and said electrical switch to provide said DC electrical power thereto.
9. The safety apparatus of claim 6 further comprising a DC battery operatively connected to at least one of said current sensor, said addressable microcontroller, and said electrical switch to provide DC electrical power thereto.
10. The safety apparatus of claim 6 further comprising a reset button operatively connected to said electrical switch to facilitate closing of said electrical switch.
11. An electrical outlet comprising:
a hot electrical terminal;
a neutral electrical terminal;
a current sensor adapted to detect an electrical current flowing between said hot electrical terminal and said neutral electrical terminal in response to a current drawing load being plugged into said electrical outlet;
a wireless transceiver to receive and transmit messages wirelessly;
an electrical switch capable of being automatically triggered to switch from a closed position to an open position, thereby stopping said flowing electrical current; and
a microcontroller operatively connected to said wireless transceiver, said current sensor, and said electrical switch to facilitate communication of a current sense event from said current sensor to said wireless transceiver within said electrical outlet, and to facilitate communication of a timed-out event from said wireless transceiver to said electrical switch within said electrical outlet.
12. The electrical outlet of claim 11 further comprising a power regulator operatively connected between said hot electrical terminal and said neutral electrical terminal to convert AC electrical power to DC electrical power.
13. The electrical outlet of claim 12 wherein said power regulator is further operatively connected to at least one of said current sensor, said microcontroller, said wireless transceiver, and said electrical switch to provide said DC electrical power thereto.
14. The electrical outlet of claim 11 further comprising a DC battery operatively connected to at least one of said current sensor, said microcontroller, said wireless transceiver, and said electrical switch to provide DC electrical power thereto.
15. The electrical outlet of claim 11 further comprising a reset button operatively connected to said electrical switch to facilitate closing of said electrical switch.
16. In an electrical outlet for providing AC electrical power to an electrical load, the electrical outlet having a hot electrical portion and a neutral electrical portion and being capable of having an electrical load plugged thereinbetween, the improvement comprising a safety apparatus comprising:
a current sensor adapted to detect an electrical current flowing between said hot electrical portion and said neutral electrical portion in response to a current drawing load being plugged into said electrical outlet;
a wireless transceiver to receive and transmit messages wirelessly;
an electrical switch capable of being automatically triggered to switch from a closed position to an open position, thereby stopping said flowing electrical current; and
a microcontroller operatively connected to said wireless transceiver, said current sensor, and said electrical switch to facilitate communication of a current sense event from said current sensor to said wireless transceiver within said electrical outlet, and to facilitate communication of a timed-out event from said wireless transceiver to said electrical switch within said electrical outlet.
17. The safety apparatus of claim 16 further comprising a power regulator operatively connected between said hot electrical portion and said neutral electrical portion to convert AC electrical power to DC electrical power.
18. The safety apparatus of claim 17 wherein said power regulator is further operatively connected to at least one of said current sensor, said microcontroller, said wireless transceiver, and said electrical switch to provide said DC electrical power thereto.
19. The safety apparatus of claim 16 further comprising a DC battery operatively connected to at least one of said current sensor, said microcontroller, said wireless transceiver, and said electrical switch to provide DC electrical power thereto.
20. The safety apparatus of claim 16 further comprising a reset button operatively connected to said electrical switch to facilitate closing of said electrical switch.
21. A system comprising:
existing electrical wires including a hot electrical wire and a neutral electrical wire for providing electrical power;
a first carrier-current transceiver operatively connected to said existing electrical wires;
a central computer operatively connected to said first carrier-current transceiver to send and receive messages over said existing electrical wires via said first carrier-current transceiver;
at least one addressable electrical outlet operatively connected to said existing electrical wires, said at least one electrical outlet including:
a hot electrical terminal,
a neutral electrical terminal,
a current sensor adapted to detect an electrical current flowing between said hot electrical terminal and said neutral electrical terminal in response to a current drawing load being plugged into said electrical outlet,
a second carrier-current transceiver operatively connected to said hot electrical terminal and said neutral electrical terminal to receive and send messages over said existing electrical wires,
an electrical switch capable of being automatically triggered to switch from a closed position to an open position, thereby stopping said flowing electrical current, and
an microcontroller operatively connected to said second carrier-current transceiver, said current sensor, and said electrical switch to facilitate communication of a current sense event from said current sensor to said second carrier-current transceiver within said electrical outlet, and to facilitate communication of a timed-out event from said second carrier-current transceiver to said electrical switch within said electrical outlet.
22. The system of claim 21 further comprising a display panel operatively connected to said central computer to display a status of said at least one addressable electrical outlet.
23. A system comprising:
existing electrical wires including a hot electrical wire and a neutral electrical wire for providing electrical power;
a central computer to provide timing and control capability and having a first wireless transceiver to receive and transmit messages wirelessly;
at least one addressable electrical outlet operatively connected to said existing electrical wires, said at least one electrical outlet including:
a hot electrical terminal,
a neutral electrical terminal,
a current sensor adapted to detect an electrical current flowing between said hot electrical terminal and said neutral electrical terminal in response to a current drawing load being plugged into said electrical outlet,
a second wireless transceiver to receive and transmit messages wirelessly,
an electrical switch capable of being automatically triggered to switch from a closed position to an open position, thereby stopping said flowing electrical current, and
a microcontroller operatively connected to said second wireless transceiver, said current sensor, and said electrical switch to facilitate communication of a current sense event from said current sensor to said second wireless transceiver within said electrical outlet, and to facilitate communication of a timed-out event from said second wireless transceiver to said electrical switch within said electrical outlet.
24. The system of claim 23 further comprising a display panel operatively connected to said central computer to display a status of said at least one addressable electrical outlet.
Priority Applications (1)
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US13/396,671 US20120194952A1 (en) | 2008-08-07 | 2012-02-15 | Controllable electrical outlet and a method of operation thereof |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US12/187,579 US8050001B2 (en) | 2008-08-07 | 2008-08-07 | Timed electrical outlet and a method of operation thereof |
US12/197,334 US8174148B2 (en) | 2008-08-07 | 2008-08-25 | Controllable electrical outlet and a method of operation thereof |
US13/396,671 US20120194952A1 (en) | 2008-08-07 | 2012-02-15 | Controllable electrical outlet and a method of operation thereof |
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US12/197,334 Division US8174148B2 (en) | 2008-08-07 | 2008-08-25 | Controllable electrical outlet and a method of operation thereof |
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US20120194952A1 true US20120194952A1 (en) | 2012-08-02 |
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US13/396,671 Abandoned US20120194952A1 (en) | 2008-08-07 | 2012-02-15 | Controllable electrical outlet and a method of operation thereof |
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US12/197,334 Active 2028-10-13 US8174148B2 (en) | 2008-08-07 | 2008-08-25 | Controllable electrical outlet and a method of operation thereof |
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Also Published As
Publication number | Publication date |
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WO2010017126A2 (en) | 2010-02-11 |
US20100033024A1 (en) | 2010-02-11 |
WO2010017126A3 (en) | 2010-05-06 |
US8174148B2 (en) | 2012-05-08 |
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