US3689856A - Switch having opposed dome and flexible bifurcated contacts - Google Patents
Switch having opposed dome and flexible bifurcated contacts Download PDFInfo
- Publication number
- US3689856A US3689856A US180629A US3689856DA US3689856A US 3689856 A US3689856 A US 3689856A US 180629 A US180629 A US 180629A US 3689856D A US3689856D A US 3689856DA US 3689856 A US3689856 A US 3689856A
- Authority
- US
- United States
- Prior art keywords
- contact
- contacts
- switch
- dome
- bifurcated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
- H01H1/28—Assembly of three or more contact-supporting spring blades
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
- H01H2011/047—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion on both sides of the contact body portion
Definitions
- This invention has general utility in switches, and may be used, for example, in switch and relay structures, such as those illustrated in U.S. Pat. No. 3,226,508, granted Dec. 28, 1965, to A. H. Morgan, Walter Uhl and Henry R. Angel, and No. 3,418,608 granted on Dec. 24, 1968, to Henry R. Angel and A. Henry Morgan, both of which patents are assigned to Electronic Controls, Inc.
- the present invention provides a switch which has particular applicability in low level circuits, commonly known as dry circuits, but has applicability in other applications, as well. It is of the class of opposed contact switches, but it is more highly reliable than other switches of this class and will consistently make good electrical contact of an essentially constant contact resistance over a long active life. It has inherent in its structure a contact wiping action in more than one direction, and, therefore, will maintain clean contacts. At the same time it provides two very positive contacts, instead of one insuring that at least one contact is always closed. As a practical matter both contacts always close and the contact resistance of each of these contacts remains essentially constant because the nature of the contact is always the same, even though it may vary in position due to some minor shifting of the switch parts, due to wear, or for other reasons.
- the structure of the present invention involves a switch employing a pair of contacts, at least one of which is supported on a resilient support, supported by an insulating supporting frame which holds the contact support structure and maintains a predetermined relationship between said contacts.
- An actuator means moves at least one contact relative to the other contact to change switch condition.
- one of the contacts is provided with a convex dome-shaped contact area with no flat portions over said area.
- the other contact is bifurcated and consists of a pair of elements providing contact surfaces spaced from one another, and each having a dome contact wiping region opposed to a portion of the dome contact and supported by a pair of flexible spring supports capable of resilient flexing and twisting such that as the contacts are urged together the flexible spring supports will continuously urge each of the contact surfaces into wiping engagement with the dome contact.
- Independently flexing, twisting and yielding is provided by the supports for each contact surface to accommodate to the position of the other and for accommodating to a position producing good electrical contact itself.
- the contact areas are coated with precious metal by plating, or otherwise, and preferably the bifurcated contact is an integral part of a long narrow strip provided with a slot extending part way along the strip to divide the strip into two flexible spring supports, such that each spring support is sufficiently long and narrow relative to its thickness to permit needed twisting to accommodate movement necessary to keep each contact in good wiping condition and good electrical contact with the dome contact.
- a U.S. Pat. No. 2,850,602 to Breese et al. shows a domed contact opposed to a trough in order to give two regions of contact on the dome.
- the effect of ridged connection from one side of the trough to the other results under certain circumstances in contact occurring only at one point and contact at that one point may actually act to hold the second region away from the dome.
- the applicants arrangement employs two separately supported contact sur faces of the bifurcated contact with separate flexible and yielding supports for each of the bifurcated contact elements so that the position assumed by each is independent of the other.
- the present invention does assume that the throw of the switch is sufficient that after the first one of the bifurcated elements strikes the dome its spring will permit it to yield, twist or slide over the dome until the second contact is in position. Thereafter both contact elements will yield, twist or slide until movement under the influence of their actuator is stopped.
- FIG. 1 is a partial sectional view through a relay assembly of the general type shown in FIG. 1 of U.S. Pat. No. 3,226,508 on a somewhat enlarged scale;
- FIG. 2 is a partial sectional view taken along line 2- 2 of FIG. 1;
- FIG. 3 is an enlarged view taken along line 3-3 of FIG. 2 showing part of the structure shown in FIG. 1;
- FIG. 4 is a plan view from above of a single bifurcated spring switch blade
- FIG. 5 is a further enlarged, somewhat schematic view taken on line 5-5 of FIG. 3 showing the contacts open;
- FIG. 6 is a view similar to FIG. 5 showing the contacts closed.
- FIGS. 1 and 2 a relay somewhat similar to that shown in FIGS. 1 and 3 of U.S. Pat. No. 3,226,508 is shown in energized position.
- An electromagnetic actuator generally designated 10 acts through a plunger 12 to move crossbar 14.
- the ends of movable contact support blades 18 are engaged in opposed carrying slots 16 of crossbar 14.
- the support blades carry on their opposite sides, in the position shown, contact buttons 20 and 22, each of which provides a domed contact surface, which will be discussed hereafter.
- the blades 18, which provide resilient spring support for the contacts as well as acting as conductors, are cantilever supported together with their terminal elements 24 by portions of an insulating support structure 26.
- similar blades are positioned in generally parallel side-by-side relationship across the width of the housing on both sides of the actuator bar 14.
- the number of blades 18, and switch pairs involved can, of course differ in different applications, but in this instance there are 12.
- the insulating support structure 26 Also supported by the insulating support structure 26 are two other sets of blades 28 and 30 and their respective terminal members 32 and 34.
- the blades 28 and 30 are also supported in cantilever fashion generally parallel and aligned in opposition to blades 18, with their ends being opposed to the switch contacts 22 and 20, respectively.
- the electromagnetic actuator has pulled the rod 12 into its upper position, thereby moving bar 14 upward and with it each of the blades 18, in opposition to the spring effect of blades 18, so that normally open contacts 30 are closed, and that normally closed contacts 22 and 28 are open.
- the inherent spring effect of blades 18 will urge contacts away from blades 30 and cause normally closed contact 22 to close against the blades 28.
- FIGS. 3 and 4 For a full understanding of the novel details of the present invention, reference is made to FIGS. 3 and 4, wherein some of the details of the structure may be better appreciated.
- the spring blades 18, for supporting the contacts 20 and 22, as well as blades 28 and 30 have been made of beryllium copper but could be made of other appropriate conductive spring material.
- the contacts 20 and 22 may be made of silver, or other precious metal, or of other suitable conductive contact material, preferably plated with precious metal.
- Contacts 20 and 22 are respectively cylindrical buttons, which, in accordance with the invention are provided with domed contact surfaces 20a and 22a, respectively.
- surfaces 20a and 22a are spherical surfaces, having a /4-inch radius in their practical application.
- Other domed surfaces, which do not provide flats, are intended to be within the scope of the invention. It is also preferred that the surfaces be of such shape as to not even permit line contacts with the contact elements 30 and 28, respectively.
- the bifurcated contact elements 28 and 30 are of identical structure so that con-sideration of blade 30 will be an effective description and consideration of blade 28 as well.
- blade 30 is a strip of conductive spring material.
- the blade is bent at its electrical contact end to provide a step 36, which assures that the contact regions 38 are closer to the domed contact 20a, so that the chance of shorting between blades 18 and 30, for example, is minimized.
- the end of the strip is turned upward in ridge 40 to prevent any possibility that the end of the blade might dig into the contact 20.
- a long slot 42 extending lengthwise of the blade, preferably as shown dividing the blade into two equal halves 44a and 44b. This slot is carried back almost to the point where the terminal piece 34 is welded to the blade 30.
- the welding is done at two points on opposite sides of the circular segment cutouts 46, which act as alignment grooves cooperating with cylindrical elements of insulating material extending throughthe insulating support structure.
- the length which the slot 42 has depends upon how long it needs to be to make spring elements 44a and 44b sufficiently long to permit the required amount of independent twisting and flexing.
- the thickness of each contact support also will be determinative of the flexibility, and particularly the twistability, of the support elements. As is illustrated, and possibly exaggerated, in FIG.
- each contact 38a and 38b has its separate and independent flexible support.
- spring support 34b will also permit twisting and flexing to accomodate the domed surface 20a.
- flexible support 44a will yield and twist just as support 44b continues to yield and twist until the structure comes to rest.
- the slot 42 be kept sufficiently wide that no interference between the two contact elements 38a and 38b will occur. It is also desirable that the areas of actual contact be plated with precious metal, or otherwise covered with precious metal by inlaying, or any other appropriate process, in order to provide minimum contact resistance. Obviously many modifications to the structure shown are possible within the scope of the present invention. It is contemplated that, depending upon the particular application, many variations in the shape and size of the domed contact will be required and many variations, particularly in the shape and size of the flexible spring elements of the other contacts will be required. All such modifications within the scope of the apended claims are intended to be within the scope and spirit of the present invention.
- a switch employing a pair of contacts at least one of which is supported on a resilient support with an insulating support frame to hold the contact support structure and maintain a predetermined relationship between said contacts and actuator means for moving at least one contact relative to the other contact to change switch condition
- the improvement comprising providing one contact with a convex dome shaped contact area with flat portion over said area making the second contact bifurcated and consisting of a pair of elements providing contact surfaces spaced from one another, each having a dome contact wiping edge opposed to a portion of the dome contact and supported by a pair of flexible spring supports capable of resilient flexing and twisting such that as the contacts are urged together the flexible spring supports will continuously urge each of the contact surfaces into wiping engagement with the dome contact, independently flexing, twisting and yielding as needed to accomodate the position of the other while maintaining good contact itself.
- bifurcated contacts are integral with their spring supports and comprise conductive spring sheetrnetal in an elongated strip whose thickness in the direction of principal movement toward the dome contact is small compared to its width.
- each resilient support for each of the bifurcated contacts is sufficiently long and narrow relative to its thickness to permit eededt isti to comod te movement nec ssar to izeep eadi i of file ffurcate contacts in goo wiriing condition with the dome contact.
Abstract
Description
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18062971A | 1971-09-15 | 1971-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3689856A true US3689856A (en) | 1972-09-05 |
Family
ID=22661159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US180629A Expired - Lifetime US3689856A (en) | 1971-09-15 | 1971-09-15 | Switch having opposed dome and flexible bifurcated contacts |
Country Status (3)
Country | Link |
---|---|
US (1) | US3689856A (en) |
CA (1) | CA966182A (en) |
GB (1) | GB1384294A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2206571A1 (en) * | 1972-11-15 | 1974-06-07 | Bunker Ramo | |
US4027131A (en) * | 1974-09-13 | 1977-05-31 | Siemens Aktiengesellschaft | Spring contact assembly |
US4314123A (en) * | 1979-01-18 | 1982-02-02 | Siemens Aktiengesellschaft | Current feed for a super-conducting magnet coil |
US4322700A (en) * | 1979-12-21 | 1982-03-30 | Bell Telephone Laboratories, Incorporated | Electrical relay apparatus |
US5021760A (en) * | 1989-10-03 | 1991-06-04 | Clum Manufacturing Company, Inc. | Solenoid switch contact and mounting assembly |
US5359307A (en) * | 1993-08-12 | 1994-10-25 | Hewlett-Packard Corporation | High voltage relay |
US6064016A (en) * | 1998-08-04 | 2000-05-16 | Itt Manufacturing Enterprises, Inc. | Wiper switch terminal and contact |
US20040113714A1 (en) * | 2002-12-16 | 2004-06-17 | Com Dev Ltd. | Incomplete mechanical contacts for microwave switches |
GB2413703A (en) * | 2004-04-30 | 2005-11-02 | Blp Components Ltd | Electrical contactor |
US20090294260A1 (en) * | 2008-05-30 | 2009-12-03 | Itron,Inc. | Meter with integrated high current switch |
US20110074600A1 (en) * | 2009-09-30 | 2011-03-31 | Itron, Inc. | Utility remote disconnect from a meter reading system |
US20110074602A1 (en) * | 2009-09-30 | 2011-03-31 | Itron, Inc. | Gas shut-off valve with feedback |
US20130178086A1 (en) * | 2012-01-09 | 2013-07-11 | Johnson Electric International (Uk) Limited | Switching contactor |
US8890711B2 (en) | 2009-09-30 | 2014-11-18 | Itron, Inc. | Safety utility reconnect |
US20150015349A1 (en) * | 2013-07-11 | 2015-01-15 | Johnson Electric S.A. | Electrical contactor |
US9005423B2 (en) | 2012-12-04 | 2015-04-14 | Itron, Inc. | Pipeline communications |
US9368266B2 (en) | 2014-07-18 | 2016-06-14 | Trumpet Holdings, Inc. | Electric solenoid structure having elastomeric biasing member |
US11776783B2 (en) * | 2018-10-15 | 2023-10-03 | Tyco Electronics Austria Gmbh | Kit and method for the assembly of at least two variants of a relay and contact spring for a relay |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2149699A (en) * | 1936-11-09 | 1939-03-07 | Charles F James | Three-way switch |
US2612367A (en) * | 1948-09-06 | 1952-09-30 | Ingenjors N H F Rost & Soner F | Switch contact spring |
US3068335A (en) * | 1960-06-21 | 1962-12-11 | Litton Systems Inc | Dry circuit switch |
US3270156A (en) * | 1964-03-23 | 1966-08-30 | American Mach & Foundry | Switching devices with contact means which inhibit contact bounce |
US3286049A (en) * | 1965-08-23 | 1966-11-15 | Heppenstall Co | Switch unit with integral contact and actuator structure |
US3418608A (en) * | 1966-03-20 | 1968-12-24 | Electronic Controls Inc | Magnetically actuated miniature relay |
US3493702A (en) * | 1967-06-19 | 1970-02-03 | Polycontact Ag | Quick action switch with sharp edge contacts |
-
1971
- 1971-09-15 US US180629A patent/US3689856A/en not_active Expired - Lifetime
-
1972
- 1972-06-09 CA CA144,355A patent/CA966182A/en not_active Expired
- 1972-06-15 GB GB2799672A patent/GB1384294A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2149699A (en) * | 1936-11-09 | 1939-03-07 | Charles F James | Three-way switch |
US2612367A (en) * | 1948-09-06 | 1952-09-30 | Ingenjors N H F Rost & Soner F | Switch contact spring |
US3068335A (en) * | 1960-06-21 | 1962-12-11 | Litton Systems Inc | Dry circuit switch |
US3270156A (en) * | 1964-03-23 | 1966-08-30 | American Mach & Foundry | Switching devices with contact means which inhibit contact bounce |
US3286049A (en) * | 1965-08-23 | 1966-11-15 | Heppenstall Co | Switch unit with integral contact and actuator structure |
US3418608A (en) * | 1966-03-20 | 1968-12-24 | Electronic Controls Inc | Magnetically actuated miniature relay |
US3493702A (en) * | 1967-06-19 | 1970-02-03 | Polycontact Ag | Quick action switch with sharp edge contacts |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3885115A (en) * | 1972-11-15 | 1975-05-20 | Bunker Ramo | Switch-over contact |
FR2206571A1 (en) * | 1972-11-15 | 1974-06-07 | Bunker Ramo | |
US4027131A (en) * | 1974-09-13 | 1977-05-31 | Siemens Aktiengesellschaft | Spring contact assembly |
US4314123A (en) * | 1979-01-18 | 1982-02-02 | Siemens Aktiengesellschaft | Current feed for a super-conducting magnet coil |
US4322700A (en) * | 1979-12-21 | 1982-03-30 | Bell Telephone Laboratories, Incorporated | Electrical relay apparatus |
US5021760A (en) * | 1989-10-03 | 1991-06-04 | Clum Manufacturing Company, Inc. | Solenoid switch contact and mounting assembly |
US5359307A (en) * | 1993-08-12 | 1994-10-25 | Hewlett-Packard Corporation | High voltage relay |
US6064016A (en) * | 1998-08-04 | 2000-05-16 | Itt Manufacturing Enterprises, Inc. | Wiper switch terminal and contact |
EP1431991A3 (en) * | 2002-12-16 | 2008-12-31 | Com Dev Ltd. | Incomplete mechanical contacts for microwave switches |
US20040113714A1 (en) * | 2002-12-16 | 2004-06-17 | Com Dev Ltd. | Incomplete mechanical contacts for microwave switches |
EP1431991A2 (en) * | 2002-12-16 | 2004-06-23 | Com Dev Ltd. | Incomplete mechanical contacts for microwave switches |
US6856212B2 (en) | 2002-12-16 | 2005-02-15 | Com Dev Ltd. | Incomplete mechanical contacts for microwave switches |
US20090318000A1 (en) * | 2004-04-30 | 2009-12-24 | Dialight Blp Limited | Electrical Contactor |
US8226427B2 (en) | 2004-04-30 | 2012-07-24 | Dialight Plc | Electrical contactor |
GB2413703A (en) * | 2004-04-30 | 2005-11-02 | Blp Components Ltd | Electrical contactor |
US7833034B2 (en) | 2004-04-30 | 2010-11-16 | Dialight Blp Limited | Electrical contactor |
GB2413703B (en) * | 2004-04-30 | 2007-03-28 | Blp Components Ltd | Electrical contactor |
US20110095853A1 (en) * | 2004-04-30 | 2011-04-28 | Richard Anthony Connell | Electrical contactor |
US20090294260A1 (en) * | 2008-05-30 | 2009-12-03 | Itron,Inc. | Meter with integrated high current switch |
US20090295371A1 (en) * | 2008-05-30 | 2009-12-03 | Itron, Inc. | Actuator/wedge improvements to embedded meter switch |
US8395464B2 (en) | 2008-05-30 | 2013-03-12 | Itron, Inc. | Actuator/wedge improvements to embedded meter switch |
US8040664B2 (en) | 2008-05-30 | 2011-10-18 | Itron, Inc. | Meter with integrated high current switch |
US20110074600A1 (en) * | 2009-09-30 | 2011-03-31 | Itron, Inc. | Utility remote disconnect from a meter reading system |
US20110074602A1 (en) * | 2009-09-30 | 2011-03-31 | Itron, Inc. | Gas shut-off valve with feedback |
US8493232B2 (en) | 2009-09-30 | 2013-07-23 | Itron, Inc. | Gas shut-off valve with feedback |
US8890711B2 (en) | 2009-09-30 | 2014-11-18 | Itron, Inc. | Safety utility reconnect |
US20130178086A1 (en) * | 2012-01-09 | 2013-07-11 | Johnson Electric International (Uk) Limited | Switching contactor |
US8845350B2 (en) * | 2012-01-09 | 2014-09-30 | Johnson Electric International (Uk) Limited | Switching contactor |
US9005423B2 (en) | 2012-12-04 | 2015-04-14 | Itron, Inc. | Pipeline communications |
US20150015349A1 (en) * | 2013-07-11 | 2015-01-15 | Johnson Electric S.A. | Electrical contactor |
US9136068B2 (en) * | 2013-07-11 | 2015-09-15 | Johnson Electric S.A. | Electrical contactor |
US9368266B2 (en) | 2014-07-18 | 2016-06-14 | Trumpet Holdings, Inc. | Electric solenoid structure having elastomeric biasing member |
US11776783B2 (en) * | 2018-10-15 | 2023-10-03 | Tyco Electronics Austria Gmbh | Kit and method for the assembly of at least two variants of a relay and contact spring for a relay |
Also Published As
Publication number | Publication date |
---|---|
GB1384294A (en) | 1975-02-19 |
CA966182A (en) | 1975-04-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3689856A (en) | Switch having opposed dome and flexible bifurcated contacts | |
US3189703A (en) | Snap-action electrical switch having planar terminals mounted in a common plane | |
US3749872A (en) | Switch mounted on printed circuit board | |
US3221115A (en) | Actuator cam structure for linearly operated switch | |
US4644115A (en) | Compact snap action switch | |
US3253092A (en) | Double pole switch with reversible contact structure | |
US2762880A (en) | Electric slide switch | |
US3983355A (en) | Switching apparatus | |
GB1276026A (en) | Electrical switch components and switches formed thereby | |
US3643046A (en) | Multiple contact snap action slide switch | |
US3294932A (en) | Wiping contact switch | |
US4336429A (en) | Switch unit | |
US3699292A (en) | Slidable contact member for minature switch | |
US3787653A (en) | Electrical switch assembly | |
US2850602A (en) | Relay contact arrangement | |
US3152237A (en) | Electrical switching devices with movable contact engageable with v-shaped contact | |
US3271535A (en) | Switch device with improved detent structure | |
US3270156A (en) | Switching devices with contact means which inhibit contact bounce | |
US3330930A (en) | Shorting and non-shorting switch contact constructions | |
US2000442A (en) | Electric circuit interrupter | |
US3681547A (en) | Snap action switch with free-floating roller and cam shaped actuator | |
US3239637A (en) | Electromechanical devices | |
US3829634A (en) | Slide switch assembly having piggyback multiple actuators extending through common cover aperture | |
US3163741A (en) | Low travel switch mechanism mounting | |
US3352980A (en) | Slidable switch actuator contacts and structure associated therewith |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHAWMUT BANK, N.A., ONE FEDERAL STREET BOSTON, MAS Free format text: SECURITY INTEREST;ASSIGNOR:T-BAR INCORPORATED;REEL/FRAME:004737/0173 Effective date: 19870702 Owner name: FRENCH AMERICAN BANKING CORPORATION, 120 BROADWAY Free format text: SECURITY INTEREST;ASSIGNOR:T-BAR INCORPORATED;REEL/FRAME:004737/0173 Effective date: 19870702 Owner name: MARINE MIDLAND BANK, N.A., 140 BROADWAY NEW YORK, Free format text: SECURITY INTEREST;ASSIGNOR:T-BAR INCORPORATED;REEL/FRAME:004737/0173 Effective date: 19870702 |
|
AS | Assignment |
Owner name: DATA SWITCH CORPORATION, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHAWMUT BANK N.A.;REEL/FRAME:007656/0729 Effective date: 19950505 |