US2197382A - Dishwashing machine - Google Patents

Dishwashing machine Download PDF

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US2197382A
US2197382A US190537A US19053738A US2197382A US 2197382 A US2197382 A US 2197382A US 190537 A US190537 A US 190537A US 19053738 A US19053738 A US 19053738A US 2197382 A US2197382 A US 2197382A
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Prior art keywords
water
pump
soap
valve
cycle
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US190537A
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Joseph M Murphy
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EUGENE V MYERS
LOUIS E GILES
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EUGENE V MYERS
LOUIS E GILES
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/44Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4418Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/85978With pump
    • Y10T137/86131Plural
    • Y10T137/86139Serial
    • Y10T137/86147With single motive input
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86389Programmer or timer
    • Y10T137/86445Plural, sequential, valve actuations

Definitions

  • This invention relates to improvements in machines for washing dishes or the like.
  • An important object of the invention is to provide, in dishwashing machines, a water supply system arranged to deliver and spray hot water forcibly upon dishes or the like at such high pressures and in such fine streams that the quantity of water used in a complete washing operation may be sufficiently low that water need not be repeatedly used and that the cost of the water used and of the energy used to heat the water, nevertheless, may be greatly minimized, thereby rendering such a device economically practical.
  • Such repeated use of water defeats the very objectives of a washing machine and the present invention avoids such repeated use, while deriving economical operation, by scientifically controlling the delivery ofonly a moderate supply of water in each washing cycle.
  • a further object of the invention is the provi-" sion, in dishwashing machines, of means for antomatically measuring a charge of ,soap or the like and distributing such a measured charge substantially evenly into water being pumped to the dishes during a first part of a complete washing cycle.
  • -A still further object of the invention is theprovision of means whereby, upon the washing machine being set into operation, the water supply is automatically turned on, a.
  • Fig. 1a is a perspective'view of one form of a complete washing machine according to the in vention, the door being partly open to partly show the interior of the device.
  • a Fig. 2 is a vertical sectional view extending from side to side of a dishwashing machine illustrat-' ing a suitable arrangement of the various com ponent parts thereof within a suitable casing.
  • Fig. 3 is a side view, partly in elevation and partly in section, of reduction gearing and a soap measuring or dispensing device and a switch and valve cam connected to said gearing, the section being substantially on the lines 3-3 of Figs. 2 and 4.
  • - Fig. 4 is a top view, partly in elevation and partly in section, of the parts shown in Fig. 3, the section being substantially on the'lines H of Fig. 3..
  • Fig. 5 is a diametrical sectional view of a rotary sliding vane water pump as employed in my invention,.the section being substantially on the line 5-5 of Fig. 6, most of the component parts of the pump, at that line, however, actually appearing in elevation.
  • Fig. 6 is a further sectional view of said water pump substantially on the line Gi of Fig. 5.
  • washing of dishes or the like is accomplished inthe present invention by subjectingthem to numerous whirling jets or sprays of'hotwater at high pressure in a washing chamber! I, to which water is pumped through branch pipe lines I! and I3 by a suitable water pump it in a trunk pipe line l5, which derives its supply of water from a conduit it connected to a public water supply or 30 other suitable source of supply.
  • a water-heating tank II Connected between the trunk pipe line I! and the conduit l0, is a water-heating tank II for heating the water to a desired temperature.
  • a shut-off valve Ila is provided in the conduit lito permit the water to be shut off when the device is not in use.
  • the wash chamber II is preferably drumshaped and is provided with an opening I. at the front thereof which opening may be closed by a rounded slide door II.
  • the branch pipe lines 40 I2 and I; are provided with suitable fittings which may preferably extend centrally through the top and bottom of the wash "chamber Ii toconvey water into rotatable spray tubes 2
  • the 'upper joint 22, also, is preferably adapted to 1 serve as a pivot mounting for the door IS, the top of the latter being extended inwardly for this
  • the rotativ'e joints 22 and 13 are preferably ball-bearing joints or areotherwise adapted to permit easy rotation of the spray tubes 2. and 2
  • the upper spray tube 20 is provided'with a series of smalloriflces 2
  • is preferably similar to the said upper tube, the jets from the former, however, being directed upwardly.
  • direct jets toward each other upon dishes or the like disposed between said tubes whereby to subject said dishes to the full cleansing effect of said jets.
  • one spray tube alone could be quite effectively used within my invention, the combined and opposing action of jets from two such tubes is preferred.
  • a removable basket 25, preferably formed of non-corrosive wire or of other suitable structure may be filled with dishes or the like exteriorly of the device and may then be passed into the wash chamber l
  • the basket with the dishes therein may be disposed intermediate the two spray tubes 20 and 2
  • the water is thrown forcibly upon all sides of the dishes, after which it gravitates to the bottom of the wash chamber, then passes through a strainer 21 into a sump 28 thence into a trap 29, from which it is carried off by a waste pipe 30.
  • the strainer 21 is adapted to prevent the passage into the waste line of sizeable food particles which might stop up the waste pipe.
  • the water heating tank I1 is preferably provided with an electric resistance heating unit 3
  • a thermostatic element 32' extends into the water in the upper area of the tank I! and passes to the exterior of the tank where it coacts with a thermostatically controlled electric switch 33 which is suitably connected to the electric leads supplying energy to the heating unit 3
  • Y Means are provided .for dispensing a charge of soap or other detergent material and forcing such charge evenly into water being pumped to the wash "chamber ll during a first part of a washing cycle of operation and for discontinuing the supply of soap during a latter part of the cycle so that clear rinse water is then delivered to the dishes to complete the cleansing thereof.
  • a soap measuring cylinder 34 is connected through a pipe 35 to a soap tank 36 or other suitable source of supply of soap, which should preferably be in liquid. form so that it may readily pass through the apparatus in the manner hereinafter described.
  • the tank 36 may be disposed at a higher level than the measuring cylinder 34 so that gravity.
  • the cylinder 34 is connected to the water trunk line l5 by the pipe 31 and check valves 38 and 39 are provided in the pipes 35 and 31, respectively, to assure a uni-directional flow of soap therethrough into the trunk line l5.
  • a piston 40 is reciprocated within the cylinder 34 by a crank 4
  • is fixed upon and rotates with a countershaft 43 which is connected to shaft 44 of a motor 45, through worm gears 46, 41, 48, 49.
  • the said gears as best seen in detail in Figs. 3 and 4, are preferably arranged in two sets, each constituting a worm and worm wheel, thus affording two speed reduction stages whereby to effect a substantial reduction in the speed of shaft 43 relatively to motor shaft 44, the speed reduction between said shafts being, preferably, about 600 to 1, although the reduction may be subject to substantial variation.
  • the countershaft 43 in addition to controlling the delivery of soap into the water trunk line 5, also actuates a valve which controls the passage of water through said trunk line.
  • the said valve is opened and closed respectively by the inward and outward movement of a plunger 5
  • a lever 52 having an intermediate portion which may press the plunger inwardly to open the valve. may be provided at one end with a roller 53 which rides upon a circumferential cam surface of a cam, wheel 54 keyed to the counter-shaft 43, and the said lever 52 may be pivoted at its other end upon a bracket 55 which may be mounted upon the body of the valve 50.
  • the water pump l4 preferably of the rotary sliding vane type, is preferably directly driven by the motor 46 through the medium of a pump shaft 56 suitably coupled to shaft 44 of the motor.
  • the chamber 53 is substantially drum-shaped, and water entering said chamber is forced to pass from the point of its entrance to -the said chamber to a discharge port 6
  • the said slot is located between the ports 68 and 8
  • the orifices. 24 in the said spray tubes have a collective area which is preferably substantially less than the area of the trunk line l5 at the point where the latter receives fluid discharged from the pump, and hence it is apparent that very substantial pressure may be established in the spray tubes 28 and 2
  • the motor 45 which may be an electric motor means for effecting such control are shown diagrammatically in Fig. 1 and may comprise relay apparatus 81, as indicated within the broken line enclosure, suitably connected to the motor and also to a momentary contact starting switch 68 associated with the door l9 and a momentary contact starting switch 69 associated with the cam wheel 54.
  • adouble-acting contact member 10 is normally held, by a tension spring H; in engagement with and electrically connecting contacts 12 and 13.
  • the contact 12 is connected through a conductor 14' to one of two main leads, in-- dicated in the drawing as the pdsitive lead 15, carrying electric current from a suitable source of supply of electric energy.
  • the contact 13 is connected by a conductor 15 to one end of the coil of a circuit closing solenoid I8 and the other .end of the latters coil is connected through conmember carried thereby will actuate the said,
  • a locking arrangement is provided for preventing the retm'n of the contact member 18 to its normal position in response to the pull exerted on it by the tension spring II.
  • the coil of the release solenoid 98 is connected with the main lead 15 through conductors 83 and 84 and contact member I8, hence, it will be seen that said solenoid may only be energized when the motor circuit is closed.
  • the other end of the coil of said solenoid is connected through conductors 9
  • the switch 89 is arranged to be operated by a pin 93 on the cam wheel 54 at the end of a complete revolution of said wheel whereby to momentarily energize the solenoid 88 and release the latch 86, thus permitting the contact member III to be moved out of engagement with the contacts 8
  • Fig. 1 The operation of the device may best beunderstood by reference to Fig. 1. Assuming that the door I9 is-open and that all the parts are in the positions shown in said figure and that the energizing the solenoid 18 which draws the contact member 10 into engagement with contacts 8
  • the piston 40 of the soap dispenser Upon commencement of the rotation of the countershaft 43, the piston 40 of the soap dispenser starts to descend from its initial uppermost position and forces soap from the cylinder 34 through the open check valve 39 and the pipe 31 into the trunk line l5.
  • the soap thus passed into the trunk line had, during a latter part of a previous cycle of operation, been drawn into the cylinder 34 from the tank 36.
  • the 10 check valve 38 is held closed and the check valve 39 held open during the downstroke of the piston 40 as a result of the pressure set up in the cylinder 34 in a manner which is well understood.
  • This invention by employing fine jets of' water at very high velocity, uses aminimum quantity of water and renders it economically practical to heat such moderate quantity of water and to avoid the very objectionable re-use of it. Hot
  • the pump and other apparatus already deseribedare prefe designed and arranged use about six quarts of water for each washing 7 cycle.
  • the water heating tank l1 may preferably be of about three gallon capacity so that each washing cycle uses only about one-half the capacity of the tank and the temperature of the water in the tank may be restored by the heating apparatus, already descnibed, during the 5 period between each washing cycle.
  • a motor is preferred having a speed of approximately 1800 revolutions per minute and the reduction between the motor shaft 44 and the countershaft 43 should preferably be about 600 to 1'.
  • 10 each revolution of the countershaft would correspond to one washing cycle, and the time dura tion of each washing cycle would beapproximately twenty seconds, during which period the dishes should be effectively washed.
  • cam turned by said shaft, a valve operating member actuated by said cam, and a crank turned by said shaft and connected to the piston of said pump, the said cam and said crank being so mounted upon said shaft that the valve opens and closes at the beginning and end respectively of a cycle of operation coinciding with one revolution of said shaft, and that the piston of said pump commences a force stroke at the beginning of such a cycle and terminates a return stroke at the end of such a cycle.
  • the said driving means comprises a motor
  • the'said controlling means comprises a switch adapted to control the supply of energy to said motor and a switch ac- /tuating member driven by said motor and adapted to open said switch at the end of such. a washing cycle whereby to stop said motor and both said pumps.
  • the said intermittentdelivery pump is a reciprocating-pistonpump said main conduit, and means for driving said by during an early part of a washing cycle, coinciding with one revolution of said low-speed shaft, the piston of said latter pump executes a force stroke, and during a later part of such cycle the said piston executes a return stroke.
  • said means comprising a high-speed rotatable shaft, adapted to drive said continuous-delivery pump, a low-speed rotatable shaft, connected through reduction gearing .to said high-speed in shaft and adapted to drive said intermittent-delivery pump and to open and close said valve, the said low-speed shaft being adapted to coact with the latter pump and with said" valve in'such manner that thelatter' is opened and closed at the beginning and end respectively of a washing cycle, and'that the latter pump substantially moves soap or the like through saidauxiliary conduit into water passing through said main conduit only during an early part of such a washing-cycle.
  • the said intermittent-delivery pump is a reciprocating-piston pump, and the ate the latter, the said crank and cam being so connected to said low-speed shaftthat the said valve is opened and closed at the be inning and 7 end respectively of a washing cycle, coinciding with one revolution of said low-speed shaft, and that the piston of said pump executes a force stroke during an early part of such washing cycle and a return stroke during a later part of such cycle.
  • the said intermittent-delivery pump is a reciprocating-piston pump
  • the low-speed shaft has acrank, adapted to turn therewith, connected to the piston of said latter pump and a cam, adapted to turn therewith, coacting with a part of said valve whereby to operate the latter, the said crank and cam being so connected to said low-speed shaft that control the supply 01' energy to said motor, and
  • a switch actuating member carried by said lowspeed shaft and adapted to open said switch at the end of a washing cycle whereby to stop said motor and both said pumps.

Description

April 16, 1940. J. M. M-URPHY 2 ,197,382
msavmsnme MACHINE Filed Fe 15, 1938 s Sheets-Sme t 1 guvlm'rol W April 16, 1940. J. M. M uRP HY 2,197,382
DISHWASHING MACHINE Filed Feb. 15, 1938 SSheets-Sheet 2 INVENTOR 1940. J. M. MURPHY nlsawAsnma MACHINE Filed; Feb. 15, 1938 s Sheets8heet s m "P l b." "H 1 I E l I II n - INVENTOR 9 a KffORNEYS.
Patented Apr. 16, 1940 PATENT- oar-ice 2,191.38: msnwasnnve mourns Joseph M. Murphy, New one-fourth to Eugene York, N. Y., assignmof V. Myers, Eastorange,
.N. 1., and Louis E. Giles, New York, N. r. Application February 15,- 19:3, Serial No. 190.537
This invention relates to improvements in machines for washing dishes or the like.
An important object of the invention is to provide, in dishwashing machines, a water supply system arranged to deliver and spray hot water forcibly upon dishes or the like at such high pressures and in such fine streams that the quantity of water used in a complete washing operation may be sufficiently low that water need not be repeatedly used and that the cost of the water used and of the energy used to heat the water, nevertheless, may be greatly minimized, thereby rendering such a device economically practical. Such repeated use of water defeats the very objectives of a washing machine and the present invention avoids such repeated use, while deriving economical operation, by scientifically controlling the delivery ofonly a moderate supply of water in each washing cycle.
A further object of the invention is the provi-" sion, in dishwashing machines, of means for antomatically measuring a charge of ,soap or the like and distributing such a measured charge substantially evenly into water being pumped to the dishes during a first part of a complete washing cycle. -A still further object of the invention is theprovision of means whereby, upon the washing machine being set into operation, the water supply is automatically turned on, a. soap supply is automatically measured accurately and distributed evenly into the water supply during a first part of a washing cycle in order to deliver soapy water, such soap supply being automatically cut off in the beginning of a-latter part of a washing cycle whereby to deliver thereafter a supply of clear rinse water, and wherein the device is automatically brought to a stop after a predetermined duration of the washing cycle when by experience it would be known that the washing of the dishes has been efiectively completed. These and further objects, which will be' apparent from the following specification, are achieved by my invention as shown, for illustrative purposes, in the accompanying drawings, in which I Figure 1 is a schematic representation of the invention, some parts being shown in elevation, others in cross section, and still others being shown diagrammatically. I
Fig. 1a is a perspective'view of one form of a complete washing machine according to the in vention, the door being partly open to partly show the interior of the device. a Fig. 2 is a vertical sectional view extending from side to side of a dishwashing machine illustrat-' ing a suitable arrangement of the various com ponent parts thereof within a suitable casing.
' Fig. 3 is a side view, partly in elevation and partly in section, of reduction gearing and a soap measuring or dispensing device and a switch and valve cam connected to said gearing, the section being substantially on the lines 3-3 of Figs. 2 and 4.
- Fig. 4 is a top view, partly in elevation and partly in section, of the parts shown in Fig. 3, the section being substantially on the'lines H of Fig. 3..
Fig. 5 is a diametrical sectional view of a rotary sliding vane water pump as employed in my invention,.the section being substantially on the line 5-5 of Fig. 6, most of the component parts of the pump, at that line, however, actually appearing in elevation.
Fig. 6 is a further sectional view of said water pump substantially on the line Gi of Fig. 5.
Referring particularly to Figs. 1 and 2,the
washing of dishes or the like is accomplished inthe present invention by subjectingthem to numerous whirling jets or sprays of'hotwater at high pressure in a washing chamber! I, to which water is pumped through branch pipe lines I! and I3 by a suitable water pump it in a trunk pipe line l5, which derives its supply of water from a conduit it connected to a public water supply or 30 other suitable source of supply. Connected between the trunk pipe line I! and the conduit l0, is a water-heating tank II for heating the water to a desired temperature. A shut-off valve Ila is provided in the conduit lito permit the water to be shut off when the device is not in use.
The wash chamber II is preferably drumshaped and is provided with an opening I. at the front thereof which opening may be closed by a rounded slide door II. The branch pipe lines 40 I2 and I; are provided with suitable fittings which may preferably extend centrally through the top and bottom of the wash "chamber Ii toconvey water into rotatable spray tubes 2|! and 2| which are pivotally mounted within the said wash cham- ,ber upon rotative joints 2! and 23, respectively.
The 'upper joint 22, also, is preferably adapted to 1 serve as a pivot mounting for the door IS, the top of the latter being extended inwardly for this The rotativ'e joints 22 and 13 are preferably ball-bearing joints or areotherwise adapted to permit easy rotation of the spray tubes 2. and 2| about a vertical axis. The upper spray tube 20 is provided'with a series of smalloriflces 2| ar- 5 ranged along opposite lower sides of the opposite arms of the spray tube, the orifices being so positioned that they direct jets of hot water angularly downwardly, the back pressure of water being ejected from the opposite arms of said tube operating, in a manner which is commonly understood, to cause rapid rotation of said spray tube.
The lower spray tube 2| is preferably similar to the said upper tube, the jets from the former, however, being directed upwardly. Thus the two rapidly revolving spray tubes 20 and 2| direct jets toward each other upon dishes or the like disposed between said tubes whereby to subject said dishes to the full cleansing effect of said jets. Although one spray tube alone could be quite effectively used within my invention, the combined and opposing action of jets from two such tubes is preferred.
A removable basket 25, preferably formed of non-corrosive wire or of other suitable structure may be filled with dishes or the like exteriorly of the device and may then be passed into the wash chamber l| through the opening I8 and rested upon one or more supports 26. It will be seen that, with the illustrated arrangement, the basket with the dishes therein may be disposed intermediate the two spray tubes 20 and 2| whereby the dishes may be subjected to the action of the jets of hot water from the spray tubes 20 and 2| in the manner already described. The water is thrown forcibly upon all sides of the dishes, after which it gravitates to the bottom of the wash chamber, then passes through a strainer 21 into a sump 28 thence into a trap 29, from which it is carried off by a waste pipe 30. The strainer 21 is adapted to prevent the passage into the waste line of sizeable food particles which might stop up the waste pipe.
The water heating tank I1 is preferably provided with an electric resistance heating unit 3|, a substantial portion of which extends into the interior of the tank and is immersed in the water therein. Opposite poles of the heating unit extend to the exterior of the tank and are connected to a suitable source of electric energy. A thermostatic element 32'extends into the water in the upper area of the tank I! and passes to the exterior of the tank where it coacts with a thermostatically controlled electric switch 33 which is suitably connected to the electric leads supplying energy to the heating unit 3| whereby to en r i e and de-energize said unit as the temperature of the water in the tank goes below or above a desired temperature which in the present apparatus should preferably be about 180 F. Unheated water, from the conduit I6, enters the bottom of the tank l1 and heated water passes out at the top thereof into the trunk line l5. Y Means are provided .for dispensing a charge of soap or other detergent material and forcing such charge evenly into water being pumped to the wash "chamber ll during a first part of a washing cycle of operation and for discontinuing the supply of soap during a latter part of the cycle so that clear rinse water is then delivered to the dishes to complete the cleansing thereof. A soap measuring cylinder 34 is connected through a pipe 35 to a soap tank 36 or other suitable source of supply of soap, which should preferably be in liquid. form so that it may readily pass through the apparatus in the manner hereinafter described.
The tank 36 may be disposed at a higher level than the measuring cylinder 34 so that gravity.
may assist the passage of the soap into said cylinder, although, as will hereinafter appear, the said cylinder may be charged with soap without any aid from the force of gravity. The cylinder 34 is connected to the water trunk line l5 by the pipe 31 and check valves 38 and 39 are provided in the pipes 35 and 31, respectively, to assure a uni-directional flow of soap therethrough into the trunk line l5.
A piston 40 is reciprocated within the cylinder 34 by a crank 4| which is connected to the said piston by a connecting rod 42. The crank 4| is fixed upon and rotates with a countershaft 43 which is connected to shaft 44 of a motor 45, through worm gears 46, 41, 48, 49. The said gears, as best seen in detail in Figs. 3 and 4, are preferably arranged in two sets, each constituting a worm and worm wheel, thus affording two speed reduction stages whereby to effect a substantial reduction in the speed of shaft 43 relatively to motor shaft 44, the speed reduction between said shafts being, preferably, about 600 to 1, although the reduction may be subject to substantial variation.
It will be seen that on the upstroke of the piston 40,-check-valve 38 closes and check-valve 7 of the cylinder 34, through the pipe 31 into the water trunk line I5.
The countershaft 43, in addition to controlling the delivery of soap into the water trunk line 5, also actuates a valve which controls the passage of water through said trunk line.
The said valve is opened and closed respectively by the inward and outward movement of a plunger 5| which may be urged to and normally held in an outermost position wherein the valve is closed, by a suitable spring (not shown). A lever 52, having an intermediate portion which may press the plunger inwardly to open the valve. may be provided at one end with a roller 53 which rides upon a circumferential cam surface of a cam, wheel 54 keyed to the counter-shaft 43, and the said lever 52 may be pivoted at its other end upon a bracket 55 which may be mounted upon the body of the valve 50.
The water pump l4, preferably of the rotary sliding vane type, is preferably directly driven by the motor 46 through the medium of a pump shaft 56 suitably coupled to shaft 44 of the motor.
The shaft 56 as best understood from Figs. 5
and 6, extends through a stuffing box, 51 into a pump chamber 53 and terminates at its inner end in a suitable bearing or recess 59. Water from the pipe l5 may enter the pump chamber 53 through a port 60. The chamber 53 is substantially drum-shaped, and water entering said chamber is forced to pass from the point of its entrance to -the said chamber to a discharge port 6| by means of a rotary ring 62 of substantially the same axial diameter as the chamber 56, which ring is caused to move in a circular orbit around and in contact with the interior slot 88 in the pump casing.v The said slot is located between the ports 68 and 8| so that as the ring 62 moves in its orbit, the vane 88 substantially prevents passage of fluid from the port 68 to the port 8| except in advance of the said ring, and as the latter is in'constant contact with the circular wall and both side walls I of the pump chamber 58 and as the vane 64 is in intimate engagement with both side walls of -said chamber, the fluid is forced positively through the pump whence it passes through the port 6|, thence it continues through trunk line l5 into the branch pipe lines I! and I3 and into the spray tubes 28 and 2|.
The orifices. 24 in the said spray tubes have a collective area which is preferably substantially less than the area of the trunk line l5 at the point where the latter receives fluid discharged from the pump, and hence it is apparent that very substantial pressure may be established in the spray tubes 28 and 2| and that such fluid would therefore be ejected through the small orifices 24 in extremely fine jets and at very high velocity, so that such jets may impinge upon dishes or other articles being washed, with sufficient force that such articles may be thoroughly cleansed during a relatively short washing operation.
The motor 45, which may be an electric motor means for effecting such control are shown diagrammatically in Fig. 1 and may comprise relay apparatus 81, as indicated within the broken line enclosure, suitably connected to the motor and also to a momentary contact starting switch 68 associated with the door l9 and a momentary contact starting switch 69 associated with the cam wheel 54.
The relay apparatus 81 and the several switches referred tomay be of a conventional type and therefore are disclosed and described herein primarily with reference to their mode of operation and without reference to their actual design or arrangement of parts. This being understood, adouble-acting contact member 10 is normally held, by a tension spring H; in engagement with and electrically connecting contacts 12 and 13. The contact 12 is connected through a conductor 14' to one of two main leads, in-- dicated in the drawing as the pdsitive lead 15, carrying electric current from a suitable source of supply of electric energy. The contact 13 is connected by a conductor 15 to one end of the coil of a circuit closing solenoid I8 and the other .end of the latters coil is connected through conmember carried thereby will actuate the said,
switch when the door is closed thus momentarily energizing the solenoid 18 which moves the contact member 18 into engagement with contacts starting the motor.
through conductor as which is connected to mainlead I9, thus completing the motor circuit.
Inasmuch as the solenoid I5 is only momen- I tarilyenergized to move the contact member 18 into. engagement with the contacts 8| and 82 to close the motor circuit, a locking arrangementis provided for preventing the retm'n of the contact member 18 to its normal position in response to the pull exerted on it by the tension spring II.
i hold the member 18 in engagement with contacts 8| and 82. The latter arm of the bell-crank lever 81 is disposed within the field of a release solenoid 90 so that when the latter is energized the bell-crank will be operated and will withdraw the latch 86 from engagement with the lug 10a, whereupon the'latter will be drawn by the spring H but of engagement with the contacts 8| .and 82, thus breaking the motor circuit.
The coil of the release solenoid 98 is connected with the main lead 15 through conductors 83 and 84 and contact member I8, hence, it will be seen that said solenoid may only be energized when the motor circuit is closed. The other end of the coil of said solenoid is connected through conductors 9| and 92 and stopping switch 89 to main lead 19. The switch 89 is arranged to be operated by a pin 93 on the cam wheel 54 at the end of a complete revolution of said wheel whereby to momentarily energize the solenoid 88 and release the latch 86, thus permitting the contact member III to be moved out of engagement with the contacts 8| and 82, thereby breaking the motor circuit and stopping the apparatus.
, The operation of the device may best beunderstood by reference to Fig. 1. Assuming that the door I9 is-open and that all the parts are in the positions shown in said figure and that the energizing the solenoid 18 which draws the contact member 10 into engagement with contacts 8| and 82, thus closing the motor circuit and H tion of thecountershafhthe roller 53, which has been resting in a recess inthe circumferential surface of the cam wheel '54 is forced outof said recess by the rotation of the cam wheel, thereby actuating the lever 52 and pressing the plunger 5| of the valve 58 inwardly to open the latter.
only momentarily washing cycle.
Upon commencement of the rotation of the countershaft 43, the piston 40 of the soap dispenser starts to descend from its initial uppermost position and forces soap from the cylinder 34 through the open check valve 39 and the pipe 31 into the trunk line l5. The soap thus passed into the trunk line had, during a latter part of a previous cycle of operation, been drawn into the cylinder 34 from the tank 36. The 10 check valve 38 is held closed and the check valve 39 held open during the downstroke of the piston 40 as a result of the pressure set up in the cylinder 34 in a manner which is well understood.
15 During the downstroke of the piston 40 the passage of soap into the trunk'line l5 has been substantially regular, such regularity being assured because of the fact that the passage of soap is positively controlled by the descent of 20 said piston. When the piston 40 reaches its lowermost position, one-half of a washing cycle has been completed and during that half cycle there has been an even 'merging of soap with clear water to form soapy water which has been 25 pumped through the trunk line l5 into the spray tubes 20 and 2| being ejected from orifices 24 in the latter in jets of high velocity which impingeupon the dishes with great force, the spray tubes meanwhile revolving rapidly whereby such 30 jets are thrown upwardly and downwardly in all directions to assure that all parts of the dishes the piston 40 of the soap dispenser is .moving 1 upwardly creating a suction in the cylinder 34 which suction closes the check valve 39, and opens the check valve 38, whereupon soap is drawn from the soaptank 36 into said cylinder so that such soap may be available for the next In the meantime no soap is being delivered to the trunk line [5 and hence the water passing therethrough and being ejected from the spray tubes is clear water which operates to very effectively rinse the dishes.
45 When the piston 40 reaches its uppermost position, corresponding to the end of a washing cycle, the roller 53 again drops into the recess in the circumferential cam surface of the cam wheel 54, whereupon the lever 52 is again actu- 50 ated to close the valve 50 and automatically cutoff the delivery of water to the wash chamber. At the same time the pin 33 on the said cam wheel engages and closes the stop switch 69, thus energizing the solenoid 9] and operating the 55 bell-crank lever 8] and the latch 36 to release the contact member 10 from its engagement with the contacts BI and 82, thus breaking the motor circuit and automatically stopping the operation of the apparatus.
60 This invention; by employing fine jets of' water at very high velocity, uses aminimum quantity of water and renders it economically practical to heat such moderate quantity of water and to avoid the very objectionable re-use of it. Hot
5 'water,.being more effective for cleansing purposes than cold water, contributes to the efl'ectiveness of the relatively small quantity of watg used.
-In short, economical usage of water makes it feasible to heat it and use it only once and the 7 fact that it is heated minimizes the 'quantity of water required for each. washing cycle.
The pump and other apparatus already deseribedare prefe designed and arranged use about six quarts of water for each washing 7 cycle. The water heating tank l1 may preferably be of about three gallon capacity so that each washing cycle uses only about one-half the capacity of the tank and the temperature of the water in the tank may be restored by the heating apparatus, already descnibed, during the 5 period between each washing cycle. A motor is preferred having a speed of approximately 1800 revolutions per minute and the reduction between the motor shaft 44 and the countershaft 43 should preferably be about 600 to 1'. Thus, 10 each revolution of the countershaft would correspond to one washing cycle, and the time dura tion of each washing cycle would beapproximately twenty seconds, during which period the dishes should be effectively washed.
By using water, in this apparatus, at a temperature of approximately 180 F., substantial drying of the dishes is effected when the door is opened upon the completion of a washing cycle, this being occasioned by the very sudden drop of about 110 F. between the water temperature and the approximate room temperature, which sudden drop causes any moisture on the dishes to very rapidly evaporate.
The foregoing description ofthe invention and the particular apparatus disclosed in the accompanying drawings are set forth only for the purposeof illustrating the invention and its operation. It should, therefore, be understood that many variations may be employed in a complete washing machine or in the'parts thereof without departing from the spirit of the invention as defined in the accompanying claims.
What I claim is:'
1. The combination, in a dishwashing machine or the like, of a main conduit adapted to to be washed, a valve in said main conduit adapted to control the passage of water there- 40 through, an auxiliary; conduit adapted to pass soap or the like from a separate source of supply into said main conduit, a pump in said auxiliary' conduit, adapted to facilitate the movement of such soap or the like through said auxiliary conduit into the said main conduit, and means, common to both said pump and valve for driving the pump and for opening and closing the valve, the said valve and pump being constrained by said common means to operate in timed relationship wherein the valve opens upon the commencement of a cycle of operation and closes upon the termination of such a cycle, and the pump moves the soap or the like through said auxiliary conduit into water passing through said main conduit only duringa first part'of such cycle. 2. The combination,- in a dishwashing machine or the like, of a main conduit adapted to pass water from a. source of water supply to a discharge point proximate to dishes or the like. to be washed, a valve in said main conduit adapted to control the passage of water therethrough, an auxiliary; conduit adapted to pass soap or the like from a separate source of supply into said main conduit, areclprocating-piston pump in said auxiliary conduit, adapted to facilitate the movement of such soap or the like through said auxiliary conduit into the said main conduit, and means common'to both said pump 70 and said valve for-driving the former and for opening and closing the latter, the-said common means being adapted to open and close said valve at the commencement and termination respectively of a washing cycle, and being further adapted'to impart a force stroke to said pump during a first part of such washing cycle whereby to force soap or the like out of said pump; toward said main .conduit, and to impart a return stroke to said pump during a later part of such washing cycle whereby to move soap or the like from such soap supply into said pump.
3. The combination, in a dishwashing machine or the like, of a main conduit adapted to pass water from a source of water supply to a discharge point proximate to dishes or the like to be washed, a valve in said main conduit adapted to control the passage of water therethrough, an auxiliary conduit adapted to pass soap or the like from a separate source of supply into said main conduit, a reciprocating-piston pump in said auxiliary conduit, adapted to facilitate the movement of such soap or the like through said auxiliary conduit into the pump and operating said valve in timed relationship, said means comprising a motor-driven shaft, a. cam turned by said shaft, a valve operating member actuated by said cam, and a crank turned by said shaft and connected to the piston of said pump, the said cam and said crank being so mounted upon said shaft that the valve opens and closes at the beginning and end respectively of a cycle of operation coinciding with one revolution of said shaft, and that the piston of said pump commences a force stroke at the beginning of such a cycle and terminates a return stroke at the end of such a cycle.
4. The combination, in a dishwashing machine or the like, of a main conduit adapted to pass water from a source of water supply to a discharge point proximate to dishes or the like to be washed, a continuous-delivery pump in said main conduit adapted to facilitate the movement of water therethrough toward said discharge point, an auxiliary conduit adapted to pass soap or the like from a separate source of supply into said main conduit, an intermittent-delivery pump in said auxiliary conduit, adapted to facilitate the movement of. such soap or the like through said auxiliary conduit into the said main conduit, driving means for driving both said pumps; and means for controlling said driving nieans whereby to start said first-mentioned pump at the beginning of a washing cycle and to'stop it at the end of such cycle, the said second-mentioned pump being adapted to substantially facilitate the movement of soap or the like intermittently through said auxiliary conduit into the said main conduit. 7
5. The combination, according to claim 4, further characterlzed'in that the said driving means comprises a motor, and the'said controlling means comprises a switch adapted to control the supply of energy to said motor and a switch ac- /tuating member driven by said motor and adapted to open said switch at the end of such. a washing cycle whereby to stop said motor and both said pumps.
3;. 'The combination, according to claim 4, further characterized in that the said intermittentdelivery pump is a reciprocating-pistonpump said main conduit, and means for driving said by during an early part of a washing cycle, coinciding with one revolution of said low-speed shaft, the piston of said latter pump executes a force stroke, and during a later part of such cycle the said piston executes a return stroke.
7, The combination, in a dishwashing machine or the like, of a main conduit adapted to pass water from a source of water supply to a discharge point proximate to dishes or the like to 'be washed, a pump in said main conduit, adapted to facilitate the movement of water therethrough toward said discharge point, a valve in said main conduit, adapted to control the passage of water therethrough, an auxiliary conduit adapted to pass soap or the like from a separate source of supply into said main conduit, a pump in said auxiliary conduit, adapted to facilitate the movement of such soap or the like through said auxiliary conduit into said main conduit, means commonto both said pumps and said valve for driving both said pumps and for opening said valve upon the commencement of a cycle of operation and closing said valve upon the terminationoi such a cycle, the said pumps'and the valve being constrained by said common means to operate in timed relationship wherein watermay pass through said main con-' duit toward said discharge point continuously during the entire period of such cycle and soap or the like may substantially move through said auxiliary conduit into water passing through said main conduit, only during a first part of such cycle. I
8. The combination, in a dishwashing machine or the like, of a main conduit adapted to pass water from a source of water supply to a discharge point proximate to dishesv or the like to be washed, a continuous-delivery pump in said main conduit, adapted to facilitate the I main conduit, and means for driving said pumps and operating said valve in timed relationship,
said means comprising a high-speed rotatable shaft, adapted to drive said continuous-delivery pump, a low-speed rotatable shaft, connected through reduction gearing .to said high-speed in shaft and adapted to drive said intermittent-delivery pump and to open and close said valve, the said low-speed shaft being adapted to coact with the latter pump and with said" valve in'such manner that thelatter' is opened and closed at the beginning and end respectively of a washing cycle, and'that the latter pump substantially moves soap or the like through saidauxiliary conduit into water passing through said main conduit only during an early part of such a washing-cycle. e
9. The combination, according to claim 8, characterized in that the said intermittent-delivery pump is a reciprocating-piston pump, and the ate the latter, the said crank and cam being so connected to said low-speed shaftthat the said valve is opened and closed at the be inning and 7 end respectively of a washing cycle, coinciding with one revolution of said low-speed shaft, and that the piston of said pump executes a force stroke during an early part of such washing cycle and a return stroke during a later part of such cycle.
. 10. The combination, according to claim 8, characterized in that the said intermittent-delivery pump is a reciprocating-piston pump, and the low-speed shaft has acrank, adapted to turn therewith, connected to the piston of said latter pump and a cam, adapted to turn therewith, coacting with a part of said valve whereby to operate the latter, the said crank and cam being so connected to said low-speed shaft that control the supply 01' energy to said motor, and
a switch actuating member carried by said lowspeed shaft and adapted to open said switch at the end of a washing cycle whereby to stop said motor and both said pumps. V
- JOSEPH M.
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426291A (en) * 1940-11-07 1947-08-26 Victor R Abrams Dishwashing machine
US2597359A (en) * 1947-02-19 1952-05-20 Mcdonald Company Dishwashing apparatus
US2599110A (en) * 1946-01-14 1952-06-03 Johnson Earl Royeroft Dishwashing machine
US2608981A (en) * 1944-02-03 1952-09-02 Otto V Jackson Dishwashing machine
US2686526A (en) * 1950-10-21 1954-08-17 Apex Electrical Mfg Co Dishwasher
US2709444A (en) * 1949-08-20 1955-05-31 Pauline A Ortega Dish washing apparatus
US2842144A (en) * 1953-04-20 1958-07-08 Homer F Lyman Dishwashing machine rinsing apparatus
US3043724A (en) * 1958-04-24 1962-07-10 Dishmaster Appliances Ltd Method of washing glasses or the like
US3049302A (en) * 1960-03-18 1962-08-14 Homestead Valve Mfg Co Dual phase spray generator
US3062226A (en) * 1959-02-05 1962-11-06 James O Mcmillan Dishwasher
US3680784A (en) * 1971-01-27 1972-08-01 Auto Chlor System Detergent and wetting agent dispenser for dishwashing machines
US3683944A (en) * 1971-01-25 1972-08-15 Sybron Corp Control apparatus for washer-sterilizer
FR2577128A1 (en) * 1985-02-11 1986-08-14 Lagrandiere Marc Metering device, in particular for a continuously operating dishwashing machine, and device for its implementation
US20020100495A1 (en) * 1998-07-10 2002-08-01 Semitool, Inc. Method and apparatus for cleaning containers
US20100139328A1 (en) * 2007-07-03 2010-06-10 Daniele Favaro Method of controlling a tumble laundry drier
USD785253S1 (en) * 2015-08-30 2017-04-25 Carl Thrasher Cylindrical dishwasher with dome top

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426291A (en) * 1940-11-07 1947-08-26 Victor R Abrams Dishwashing machine
US2608981A (en) * 1944-02-03 1952-09-02 Otto V Jackson Dishwashing machine
US2599110A (en) * 1946-01-14 1952-06-03 Johnson Earl Royeroft Dishwashing machine
US2597359A (en) * 1947-02-19 1952-05-20 Mcdonald Company Dishwashing apparatus
US2709444A (en) * 1949-08-20 1955-05-31 Pauline A Ortega Dish washing apparatus
US2686526A (en) * 1950-10-21 1954-08-17 Apex Electrical Mfg Co Dishwasher
US2842144A (en) * 1953-04-20 1958-07-08 Homer F Lyman Dishwashing machine rinsing apparatus
US3043724A (en) * 1958-04-24 1962-07-10 Dishmaster Appliances Ltd Method of washing glasses or the like
US3062226A (en) * 1959-02-05 1962-11-06 James O Mcmillan Dishwasher
US3049302A (en) * 1960-03-18 1962-08-14 Homestead Valve Mfg Co Dual phase spray generator
US3683944A (en) * 1971-01-25 1972-08-15 Sybron Corp Control apparatus for washer-sterilizer
US3680784A (en) * 1971-01-27 1972-08-01 Auto Chlor System Detergent and wetting agent dispenser for dishwashing machines
FR2577128A1 (en) * 1985-02-11 1986-08-14 Lagrandiere Marc Metering device, in particular for a continuously operating dishwashing machine, and device for its implementation
US20020100495A1 (en) * 1998-07-10 2002-08-01 Semitool, Inc. Method and apparatus for cleaning containers
US6904920B2 (en) * 1998-07-10 2005-06-14 Semitool, Inc. Method and apparatus for cleaning containers
US20050268944A1 (en) * 1998-07-10 2005-12-08 Dan Bexten Method and apparatus for cleaning containers
US20100139328A1 (en) * 2007-07-03 2010-06-10 Daniele Favaro Method of controlling a tumble laundry drier
USD785253S1 (en) * 2015-08-30 2017-04-25 Carl Thrasher Cylindrical dishwasher with dome top

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