US3718791A - Pressure responsive switch - Google Patents

Pressure responsive switch Download PDF

Info

Publication number
US3718791A
US3718791A US00181013A US3718791DA US3718791A US 3718791 A US3718791 A US 3718791A US 00181013 A US00181013 A US 00181013A US 3718791D A US3718791D A US 3718791DA US 3718791 A US3718791 A US 3718791A
Authority
US
United States
Prior art keywords
contacts
planar members
portions
planar
switch
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
Application number
US00181013A
Other languages
English (en)
Inventor
T Szablowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motors Liquidation Co
Original Assignee
General Motors Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22662520&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3718791(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by General Motors Corp filed Critical General Motors Corp
Application granted granted Critical
Publication of US3718791A publication Critical patent/US3718791A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches

Definitions

  • ABSTRACT A normally open pressure responsive switch includes spaced first and second substantially planar members having opposed paddle-like configurations and composed of a dielectric generally flexible material such as plastic.
  • First and second planar contacts of fork-like configurations are respectively laminated to the opposed faces of the planar members.
  • the members and contacts are stamped to form depressions of frustoconicalconfiguration.
  • First and second terminals for connecting the switch to an electric circuit are respectively connected laterally spaced to handle portions of the contacts. The lateral spacing prevents engagement of the terminals and resultant closing of the switch.
  • a resilient foam pad positioned between and adhesively bonded to the blade portions of the planar members includes a plurality of apertures of variable configuration whose opposite ends open to the tine portions of the respective contacts.
  • the foam pad normally maintains a spaced relationship between the frustoconical apexes of the depressions respective the opposite ends of each aperture and deflects to allow engagement of these apexes and closing of the switch when the planar'members are subjected to a normal pressure above a predetermined value.
  • switches which close when subjected to a pressure above a predetermined value.
  • One manner in which this type of switch is utilized is positioned within the seat cushion of a vehicle seat adjacent the seating surface and connected to a suitable electric circuit, with the switch closing when an occupant assumes a seated position and the circuit providing an indication that the seat is in an occupied condition.
  • these switches include spaced first and second substantially planar members of a dielectric generally flexible material and have electrically conductive generally planar first and second contacts respectively laminated to their opposed faces.
  • the planar members may be composed of a suitable plastic such as a polyester while the contacts are generally composed of copper.
  • a plurality of resilient laterally spaced foam strips or a resilient apertured foam pad is situated between the planar members to normally maintain the contacts in a spaced relationship.
  • the foam deflects to allow engagement of the contacts and closing of the switches.
  • This invention provides a normally open pressure responsive switch of the type described in which spaced planar members and their opposed respective laminated planar contacts include a plurality of stamped depressions, with the depressed portions of the contacts supported by the depressed portions of the planar members, and with the apexes of thedepressed contact portions received within the opposite ends of voids defined by a resilient material normally maintaining these apexes in spaced relationship.
  • the planar members are composed of a polyester and have generally paddle-like configurations positioned in an opposed relationship, while the contacts have generally fork-like configurations with their tine portions laminated to the blade portions of the planar members in opposed relationship and with their handle portions laminated to the handle portions of the planar members in laterally spaced relationship.
  • First and second terminals for connecting the switch to an electric circuit are respectively connected to the contact handle portions whose lateral spacing prevents engagement of the terminals and resultant closing of the switch.
  • a resilient foam pad is located between the blade portions of the planar members and adhesively bonds the switch in a generally sandwich construction.
  • the foam pad includes a plurality of apertures whose opposite ends open to opposed sets of respective tine portions of the contacts.
  • the apertures may be elongated and extend for the length of the tine portions or may be shortened to provide a plurality of apertures along each set of opposed tine portions.
  • a plurality of frustoconical stamped depressions are formed in the blade portions of the planar members and the respective tine portions of the contacts such that the depressed portions of the planar members support the depressed portions of the contacts.
  • the depressions are received within the apertures of the foam pad which normally maintains the opposed apexes of the respective contacts in a spaced relationship such that the switch is open.
  • the foam pad deflects when the planar members are subjected to a normal pressure above a predetermined value to allow engagement of the apexes and closing of the switch.
  • the tine portions include strip portions having widths less than the diameter of the depressions to further reduce the rigidity of the switch.
  • one feature of this invention is that it provides an improved normally open pressure responsive switch that includes spaced first and second substantially planar members of a dielectric generally flexible material, with electrically conductive generally planar first and second contacts respectively laminated to the opposed faces of the planar members, and with a plurality ofstamped depressions formed in the planar membersv and their respective contacts and received within voids defined by a resilient material that normally maintains the apexes of the contact depressed portions in a spaced relationship.
  • the resilient material may take the form of an apertured foam pad whose opposite sides adhesively bond the planar members in the spaced relationship and whose apertures receive the stamped depressions of the planar members and the contacts.
  • the stamped depressions of the planar members and contacts have a generally frustoconical configuration and the contacts define spaces in their respective planes between the depressions such that the rigidity of the switch is not appreciably increased by the contacts.
  • the planar members have paddle-like configurations positioned in opposed relationship and the contacts have fork-like configurations, with the tine portions of the contacts laminated to blade portions of the planar members and stamped to form the depressions while the spaces between the tine portions of each contact provide the reduction in the rigidity of the switch, and with the handle portions of the contacts laminated to the handle portions of the planar members.
  • the blade portion of one of the planar members is larger than the blade portion of the other planar member such that the larger blade portion may be located on the upper side of the switch when used with a vehicle seat for detecting seat occupancy and shields the switch from liquid accidentally spilled on the seat.
  • the handle portions of the contacts have respective terminals connected to them and are laterally spaced to prevent engagement of the terminals and resultant closing of the switch.
  • the stamped depressions along the tine portions of the contacts are electrically connected by strip portions of a width less than the diameter of the depressions to further reduce the rigidity imparted to the switch by the contacts.
  • FIG. 1 is a partially broken away perspective view of a vehicle seat whose seat cushion supports a normally open pressure responsive switch, according to this invention, that is closed when a seat occupant assumes a seated position;
  • FIG. 2 is an enlarged top plan view of the switch shown in FIG. 1;
  • FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG. 2 and showing the sandwich construction of the switch which includes spaced upper and lower planar members to whose opposed faces are laminated respective planar contacts, a foam pad whose aperture opens to the contacts, and stamped frustoconical depressions in the planar members and their respective contacts which are received within the opposite ends of the aperture and maintained in a spaced relationship by the pad;
  • FIG. 4 is an enlarged sectional view taken generally along line 4-4 of FIG. 2 and showing a terminal of the switch;
  • FIG. 5 is an enlarged disassembled perspective view of the switch showing the foam pad, the fork-like configurations of the contacts, and the relative positioning of the contacts on the paddle-like configurations of the planar members;
  • FIG. 6 is a perspective view of a foam pad whose apertures are of a smaller size than the foam pad of FIG. 5.
  • a vehicle floor 10 supports a vehicle seat generally indicated by 12 in a conventional manner by a support arrangement that is not shown.
  • the seat cushion 14 of seat 12 supports a normally open pressure responsive switch 16, according to this invention, generally adjacent the seating surface.
  • switch 16 closes when an occupant assumes a seated position such that the switch may be connected to a suitable electric circuit that indicates the occupied seat condition or controls a desired function concomitant with such condition.
  • the switch 16 includes upper and lower generally planar members 18 and'20 manufactured from suitable planar stock of a generally flexible material, such as a polyester of a thickness approximately equal to 0.004 inches.
  • the upper planar member 18 includes a blade portion 22 that is of a slightly larger size than the blade portion 24 of the lower planar member such that the switch is protected from liquid accidentally spilled on the seat cushion 14 of seat 12.
  • Respective handle portions 26 and 28 of the planar members 18 and 20 extend from the blade portions 22 and 24 and are generally of the same width.
  • fork-like contacts generally indicated by 30 and 32 are respectively laminated to the planar members 18 and 20 and are manufactured from copper foil having a thickness approximately equal to .0015 inches.
  • the contacts 30 and 32 each include a plurality of respective tine portions 34 and 36 that extend along the length of the respective blade portions 22 and 24.
  • the contacts 30 and 32 also include respective handle portions 38 and 40 that extend along the handle portions 26 and 28 of the planar members.
  • a die stamping operation may be used to laminate the contacts to the planar members. To perform this operation, copper foil slightly larger than the contact is superimposed on the planar member. A heated die with a cutting edge that defines the outline of the contact is then placed above the copper foil. Downward movement of the die severs the contact portion of the foil from the adjacent excess material and the heat bonds both the contact and the excess material to the planar member. The excess material is then peeled from the planar member and the planar member and contact are subsequently heated, as will be later described, to provide a bond between the planar member and contact within the contact outline.
  • a generally rectangular pad as generally indicated by 42 in FIG. 5 is situated between the blade portions 22 and 24 and is composed of a suitable resilient material such as an open cell polyurethane foam.
  • An adhesive bonding agent is applied to the opposite sides of pad 42 and protected from undesired adhesion prior to assembly by a suitable protective layer, not shown.
  • the protective layer is removed from pad 42 to expose the adhesive bonding agent which secures the blade portions 22 and 24 and the pad 42 in a generally sandwich construction.
  • a plurality of elongated apertures 44 in pad 42 extend longitudinally of and open to respectively opposed sets of tine portions 34 and 36 of the contacts 30 and 32. It is also possible to use a similar foam pad as generally indicated by 46 in FIG. 6 with a plurality of apertures 48 opening to the opposed sets of tine por tions 34 and 36 of the contacts.
  • planar members 18 and 20 with the outlines of the contacts 30 and 32 die stamped onto them are heated to a temperature between 300 and 350 Fahrenheit prior to assembly of the switch. This heating bonds the contacts and planar members within the contact outlines.
  • a suitable die is used to stamp the blade portions 22 and 24 and the respective tine portions 34 and 36 of the contacts to form frustoconical depressions 50 and 52, best seen in FIGS. 3 and 5.
  • the die remains in engagement with the planar members during cooling to ambient temperature to prevent the depressions from snapping back to planar configurations.
  • the apertures 44 of pad 42 receive the depressions 50 and 52 as best shown in FIG.
  • the pad 42 normally maintains the apexes of the depressions in spaced relationship.
  • the pad 42 deflects to allow engagement of the apexes of depressions 50 and 52 and closing of the switch.
  • the depressed portions of the planar members support the depressed portions of the contacts to aid in preventing plastic deformation of the contacts.
  • FIG. 4 shows an enlarged sectional view of terminal 54 which includes a connector member 62 that supports lead 58 by a portion 64 and electrically connects to the lead by a portion 66.
  • the connector member includes a flattened portion 68 having an aperture 70 aligned with apertures 72 and 74 in handle portions 26 and 38 of planar member 18 and contact 30, respectively.
  • a metal insert 76 extends through the aligned apertures and includes an upper support lip 78 suitably bonded to the upper side of handle portion 26 and covered by a polyester patch 80, see also FIG. 2, to prevent electrical contact of insert 76 with any conductive seat member.
  • the lower side of insert 76 includes a lip 82 that maintains the portion 68 of connector member 62 in engagement with the handle portion 38 of contact 30.
  • Terminal 56 is similar to terminal 54 and as such will not be further described except to say that the handle portions 38 and 40 of contacts 30 and 32 are laterally offset from each other such that the terminals do not engage each other even if there is no foam spacer pador the like between the handle portions of the planar members.
  • the spaces between the tine portions 34 and 36 reduce the rigidity imparted to the switch by the contacts and the possibility it will cause discomfort to a seated occupant of seat 12.
  • the tine portions 34 and 36 include respective strip portions 84 and 86 of a width less than the diameter of the depressions, the purpose being to further reduce the rigidity imparted to the switch by the contacts and the possibility of discomfort to a seated occupant.
  • the lower side of blade portion 20 is covered by an adhesive bonding agent protected by a covering 88.
  • the adhesive bonding agent positions switch 16 on a pad seat cushion 14 prior to covering of the switch with the material providing the seating surface. After the switch is covered, the covering material and the pad cooperate to further position the switch.
  • the invention thus provides an improved normally open pressure responsive switch.
  • a normally open pressure responsive switch comprising, spaced first and second substantially planar members of a dielectric generally flexible material, electrically conductive generally planar first and second contacts respectively laminated to the opposed faces of the planar members, resilient spacing means between the planar members and defining a plurality of voids extending through the spacing means and opening to the contacts, and a plurality of stamped depressions formed in the planar members and their respective contacts and received within the voids of the spacing means with portions of the contacts forming apexes of the depressions supported by the depressed portions of the planar members, the spacing means normally maintaining a spaced relationship between the apexes of the depressions respective the opposite ends of each void and deflecting to allow engagement of these apexes and closing of the switch when the planar mem bers are subjected to a normal pressure above a predetermined value.
  • a normally open pressure responsive switch comprising, spaced first and second substantially planar members of a dielectric generally flexible material, electrically conductive generally planar first and second contacts respectively laminated to the opposed faces of the planar members, resilient spacing means between the planar members and adhesively laminated by a bonding agent thereto with a plurality of apertures extending through the spacing means and opening to the contacts, and a plurality of stamped depressions formed in the planar members and their respective contacts and received within the apertures of the spacing means with portions of the contacts forming apexes of the depressions supported by the depressed portions of the planar members, the spacing means normally maintaining a spaced relationship between the apexes of the depressions respective the opposite ends of each aperture and deflecting to allow engagement of these apexes and closing of the switch when the planar members are subjected to a normal pressure above a predetermined value.
  • a normally open pressure responsive switch comprising, spaced first and second substantially planar members of a dielectric generally flexible material, resilient spacing means between the planar members and adhesively laminated by a bonding agent thereto with a plurality of apertures extending through the spacing means and opening to the planar members, a
  • the spacing means normally maintaining a spaced relationship between the apexes of the contact depressions respective the opposite ends of each aperture while deflecting to allow engagement of these apexes and closing of the switch when the planar members are subjected to a normal pressure above a predetermined value, and the contacts defining spaces in their respective planes between the depressions thereof to reduce the rigidity imparted to the switch by the contacts.
  • a normally open pressure responsive switch comprising, spaced first and second substantially planar members of a dielectric generally flexible material and having paddle-like configurations in opposed relation ship, electrically conductive generally planar first and second contacts having fork-like configurations respec tively laminated to the opposed faces of the planar members with the tine portions of the contacts on the blade portions of the planar members and with the handle portions of the contacts on the handle portions of the planar members, terminal means for connecting the handle portions of each contact to an electric circuit,
  • the spacing means normally maintaining a spaced relationship between the apexes of the depressions respective the opposite ends of each aperture and deflecting to allow engagement of these apexes and closing of the switch when the planar members are subjected to a normal pressure above a predetermined value.
  • a normally open pressure responsive switch for use within a seat to detect occupancy of the seat, the switch comprising, spaced first and second substantially planar members of a dielectric generally flexible material and having paddle-like configurations in opposed relationship, the planar members being positionable generally parallel to a seating surface of the seat with the blade portion of the upper planar member larger than the blade portion of the lower planar member to shield the switch from liquid accidentally spilled on the seat, electrically conductive generally planar first and second contacts having fork-like configurations respectively laminated to the opposed faces of the planar members with the tine portions of the contacts on the blade portions of the planar members and with the handle portions of the contacts on the handle portions of the planar members, terminal means for connecting the handle portions of each contact to an electrical circuit, resilient spacing means between the planar members and adhesively laminated by a bonding agent thereto with a plurality of apertures extending through the spacing means and opening to the tine portions of the contacts, and a plurality of frustoconical stamped depressions formed in the planar members and the respective tine portions
  • a normally open pressure responsive switch according to claim 5 wherein the stamped depressions along the tine portions are connected by strip portions having widths less than the diameter of the depressions to further reduce the rigidity of the switch.
  • a nonnally open pressure responsive switch according to claim 5 wherein the handle portions of the contacts are laterally offset to prevent engagement of the terminal means connected thereto and resultant closing of the switch.
  • the terminal means for each contact includes a connector member having a portion for connecting a lead and a flattened portion engageable with the contact handle portion and having an aperture aligned with aligned apertures in the handle portions of both the planar member and contact, and an insert having a portion received within the aligned apertures and terminating in lips respectively engageable with the outer side of the planar member handle portion and the inner side of the connector member flattened portion to maintain engagement between the connector member and the handle portion of the contact.
  • a normally open pressure responsive switch according to claim 8 wherein the insert is composed of metal and the lip engageable with the outer side of the planar member handle portion is covered with a dielectric member to prevent electrical connection of the terminal with any conductive member of the seat the switch is for use within.
  • a normally open pressure responsive switch according to claim 5 wherein a plurality of the apertures within the spacing means open to each opposed set of tine portions of the contacts.

Landscapes

  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
US00181013A 1971-09-16 1971-09-16 Pressure responsive switch Expired - Lifetime US3718791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18101371A 1971-09-16 1971-09-16

Publications (1)

Publication Number Publication Date
US3718791A true US3718791A (en) 1973-02-27

Family

ID=22662520

Family Applications (1)

Application Number Title Priority Date Filing Date
US00181013A Expired - Lifetime US3718791A (en) 1971-09-16 1971-09-16 Pressure responsive switch

Country Status (6)

Country Link
US (1) US3718791A (enrdf_load_stackoverflow)
JP (1) JPS5123698B2 (enrdf_load_stackoverflow)
AU (1) AU465177B2 (enrdf_load_stackoverflow)
CA (1) CA950949A (enrdf_load_stackoverflow)
FR (1) FR2152950B1 (enrdf_load_stackoverflow)
GB (1) GB1358006A (enrdf_load_stackoverflow)

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859485A (en) * 1973-02-26 1975-01-07 Essex International Inc Occupant sensor seat switch
US4029925A (en) * 1976-04-05 1977-06-14 General Motors Corporation Electric switch
US4035593A (en) * 1975-10-09 1977-07-12 Northern Engraving Company, Inc. Flexible pressure sensitive switch actuator module adaptable to a keyboard surface having fixed contact array
US4037069A (en) * 1975-11-20 1977-07-19 Roland Gonzalez Mat switch
US4046975A (en) * 1975-09-22 1977-09-06 Chomerics, Inc. Keyboard switch assembly having internal gas passages preformed in spacer member
US4065649A (en) * 1975-06-30 1977-12-27 Lake Center Industries Pressure sensitive matrix switch having apertured spacer with flexible double sided adhesive intermediate and channels optionally interposed between apertures
US4086458A (en) * 1976-09-02 1978-04-25 The Ealing Corporation Electrical switch for use by the disabled
US4137116A (en) * 1977-04-22 1979-01-30 Miller Brothers Method of making a pressure switch
US4190748A (en) * 1977-01-31 1980-02-26 Rogers Corporation Keyboard switch assembly
US4200777A (en) * 1977-04-22 1980-04-29 Miller Norman K Pressure switch
US4228330A (en) * 1978-07-10 1980-10-14 Litton Systems, Inc. Touch panel mechanism
US4228115A (en) * 1979-03-22 1980-10-14 General Motors Corporation Method of making a horn pad
US4254309A (en) * 1978-12-18 1981-03-03 Texas Instruments Incorporated Snap-through characteristic keyboard switch
US4345119A (en) * 1981-02-19 1982-08-17 Motorola Inc. Membrane switch assembly with improved spacer
US4349710A (en) * 1979-03-12 1982-09-14 Miller Norman K Door edge for attachment to a train door and the like
US4376239A (en) * 1980-10-03 1983-03-08 Allen-Bradley Company Industrial membrane switch
US4385215A (en) * 1981-11-09 1983-05-24 Eeco Incorporated Thin-membrane switch
FR2538944A1 (fr) * 1982-12-30 1984-07-06 Petri Ag Contacteur de signalisation pour vehicules automobiles
WO1986005317A1 (fr) * 1985-03-06 1986-09-12 Mayser-Gmbh & Co. Natte de commutation et son procede de fabrication
US4742192A (en) * 1987-06-01 1988-05-03 Saturn Corporation Steering wheel rim horn blow mechanism
US5068504A (en) * 1989-03-15 1991-11-26 Rogers John E Seat cushions and body supports, and fitting instruments for the same
US5085462A (en) * 1990-06-29 1992-02-04 Gualtier Quentin E Airbag and vehicle horn switch assembly
US5120980A (en) * 1990-05-08 1992-06-09 Fontaine Brake Company Seat cushion switch with delay circuit
EP0872862A1 (en) * 1997-04-14 1998-10-21 Molex Incorporated Membrane switch
US5965856A (en) * 1996-11-28 1999-10-12 Aisin Seiki Kabushiki Kaisha Pressure sensitive switch
US5967299A (en) * 1998-03-12 1999-10-19 Molex Incorporated Membrane switch
USD415834S (en) * 1998-09-21 1999-10-26 Roho, Inc. Interface pressure measuring and display apparatus
USD416326S (en) 1998-09-21 1999-11-09 Roho, Inc. Interface pressure measuring element of interface pressure measuring device
US5986221A (en) * 1996-12-19 1999-11-16 Automotive Systems Laboratory, Inc. Membrane seat weight sensor
US6165142A (en) * 1998-09-21 2000-12-26 Roho, Inc. Biomedical apparatus
US6424268B1 (en) * 1999-09-10 2002-07-23 Honda Giken Kogyo Kabushiki Kaisha Occupant detecting system
US6455793B1 (en) * 1999-06-25 2002-09-24 Tokyo Sensor Co., Ltd. Continuous-length switch
US20030183497A1 (en) * 2002-03-27 2003-10-02 Johnston Raymond P. Apparatus exhibiting tactile feel
US20060278513A1 (en) * 2003-05-20 2006-12-14 Fujikura Ltd. Seating detection switch
US20120125698A1 (en) * 2009-05-29 2012-05-24 Honda Motor Co., Ltd Seating sensor
US20130192904A1 (en) * 2012-01-26 2013-08-01 Delphi Technologies, Inc. Occupant detection sensor assembly with integrated fasteners
US20190100122A1 (en) * 2017-10-04 2019-04-04 Ford Global Technologies, Llc Waterproof skinned bench seat

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549446U (enrdf_load_stackoverflow) * 1978-09-29 1980-03-31
EP0109159B1 (en) * 1982-09-30 1986-08-20 Minnesota Mining And Manufacturing Company Pressure sensitive switchmats
GB8314801D0 (en) * 1983-05-27 1983-07-06 Minnesota Mining & Mfg Electrical switch
GB2307346B (en) * 1995-11-15 2000-04-19 Christopher Mcglone Detector arrangement
GB2335310B (en) 1998-03-11 2001-09-19 Draftex Ind Ltd Force-responsive detectors and systems
RU2187165C2 (ru) * 2000-03-15 2002-08-10 Российский Федеральный Ядерный Центр - Всероссийский Научно-Исследовательский Институт Экспериментальной Физики Датчик положения

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761928A (en) * 1953-10-16 1956-09-04 Cooper Treadle and treadle frame
US2954446A (en) * 1957-11-26 1960-09-27 George W Houlsby Jr Mat type floor switch
US2959647A (en) * 1958-09-09 1960-11-08 American Electronics Surface mounted treadle
US3056005A (en) * 1960-08-04 1962-09-25 Harry J Larson Mat switch and method of making the same
US3487451A (en) * 1968-03-06 1969-12-30 John G Fontaine Brake control means for vehicles
US3617666A (en) * 1970-04-30 1971-11-02 Data Appliance Corp Pressure-operated layered electrical switch and switch array

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761928A (en) * 1953-10-16 1956-09-04 Cooper Treadle and treadle frame
US2954446A (en) * 1957-11-26 1960-09-27 George W Houlsby Jr Mat type floor switch
US2959647A (en) * 1958-09-09 1960-11-08 American Electronics Surface mounted treadle
US3056005A (en) * 1960-08-04 1962-09-25 Harry J Larson Mat switch and method of making the same
US3487451A (en) * 1968-03-06 1969-12-30 John G Fontaine Brake control means for vehicles
US3617666A (en) * 1970-04-30 1971-11-02 Data Appliance Corp Pressure-operated layered electrical switch and switch array

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859485A (en) * 1973-02-26 1975-01-07 Essex International Inc Occupant sensor seat switch
US4065649A (en) * 1975-06-30 1977-12-27 Lake Center Industries Pressure sensitive matrix switch having apertured spacer with flexible double sided adhesive intermediate and channels optionally interposed between apertures
US4046975A (en) * 1975-09-22 1977-09-06 Chomerics, Inc. Keyboard switch assembly having internal gas passages preformed in spacer member
US4131991A (en) * 1975-10-09 1979-01-02 Northern Engraving Company, Inc. Method of making flexible pressure sensitive switch
US4035593A (en) * 1975-10-09 1977-07-12 Northern Engraving Company, Inc. Flexible pressure sensitive switch actuator module adaptable to a keyboard surface having fixed contact array
US4037069A (en) * 1975-11-20 1977-07-19 Roland Gonzalez Mat switch
US4029925A (en) * 1976-04-05 1977-06-14 General Motors Corporation Electric switch
US4086458A (en) * 1976-09-02 1978-04-25 The Ealing Corporation Electrical switch for use by the disabled
US4190748A (en) * 1977-01-31 1980-02-26 Rogers Corporation Keyboard switch assembly
US4137116A (en) * 1977-04-22 1979-01-30 Miller Brothers Method of making a pressure switch
US4200777A (en) * 1977-04-22 1980-04-29 Miller Norman K Pressure switch
US4228330A (en) * 1978-07-10 1980-10-14 Litton Systems, Inc. Touch panel mechanism
US4254309A (en) * 1978-12-18 1981-03-03 Texas Instruments Incorporated Snap-through characteristic keyboard switch
US4349710A (en) * 1979-03-12 1982-09-14 Miller Norman K Door edge for attachment to a train door and the like
US4228115A (en) * 1979-03-22 1980-10-14 General Motors Corporation Method of making a horn pad
US4376239A (en) * 1980-10-03 1983-03-08 Allen-Bradley Company Industrial membrane switch
US4345119A (en) * 1981-02-19 1982-08-17 Motorola Inc. Membrane switch assembly with improved spacer
US4385215A (en) * 1981-11-09 1983-05-24 Eeco Incorporated Thin-membrane switch
FR2538944A1 (fr) * 1982-12-30 1984-07-06 Petri Ag Contacteur de signalisation pour vehicules automobiles
WO1986005317A1 (fr) * 1985-03-06 1986-09-12 Mayser-Gmbh & Co. Natte de commutation et son procede de fabrication
US4773155A (en) * 1985-03-06 1988-09-27 Mayser Gmbh & Co. Mat switch and process for its manufacture
US4742192A (en) * 1987-06-01 1988-05-03 Saturn Corporation Steering wheel rim horn blow mechanism
US5068504A (en) * 1989-03-15 1991-11-26 Rogers John E Seat cushions and body supports, and fitting instruments for the same
US5120980A (en) * 1990-05-08 1992-06-09 Fontaine Brake Company Seat cushion switch with delay circuit
WO1993026022A1 (en) * 1990-05-08 1993-12-23 Fontaine Brake Company Seat cushion switch with delay circuit
US5085462A (en) * 1990-06-29 1992-02-04 Gualtier Quentin E Airbag and vehicle horn switch assembly
US5965856A (en) * 1996-11-28 1999-10-12 Aisin Seiki Kabushiki Kaisha Pressure sensitive switch
US5986221A (en) * 1996-12-19 1999-11-16 Automotive Systems Laboratory, Inc. Membrane seat weight sensor
EP0872862A1 (en) * 1997-04-14 1998-10-21 Molex Incorporated Membrane switch
US5967299A (en) * 1998-03-12 1999-10-19 Molex Incorporated Membrane switch
USD415834S (en) * 1998-09-21 1999-10-26 Roho, Inc. Interface pressure measuring and display apparatus
USD416326S (en) 1998-09-21 1999-11-09 Roho, Inc. Interface pressure measuring element of interface pressure measuring device
US6165142A (en) * 1998-09-21 2000-12-26 Roho, Inc. Biomedical apparatus
US6455793B1 (en) * 1999-06-25 2002-09-24 Tokyo Sensor Co., Ltd. Continuous-length switch
US20020184752A1 (en) * 1999-06-25 2002-12-12 Takeshi Kasahara Method for manufacturing a continuous-length switch
US6898842B2 (en) 1999-06-25 2005-05-31 Tokyo Sensor Co., Ltd. Method for manufacturing a continuous-length switch
US6424268B1 (en) * 1999-09-10 2002-07-23 Honda Giken Kogyo Kabushiki Kaisha Occupant detecting system
US20030183497A1 (en) * 2002-03-27 2003-10-02 Johnston Raymond P. Apparatus exhibiting tactile feel
US6740832B2 (en) * 2002-03-27 2004-05-25 3M Innovative Properties Company Apparatus exhibiting tactile feel
US20080053798A1 (en) * 2003-05-20 2008-03-06 Fujikura Ltd. Seating detection switch
US20110024279A1 (en) * 2003-05-20 2011-02-03 Fujikura Ltd. Seating detection switch
US20060278513A1 (en) * 2003-05-20 2006-12-14 Fujikura Ltd. Seating detection switch
US7528333B2 (en) 2003-05-20 2009-05-05 Fujikura Ltd. Seating detection switch
US20090120776A1 (en) * 2003-05-20 2009-05-14 Fujikura Ltd. Seating detection switch
US20090127089A1 (en) * 2003-05-20 2009-05-21 Fujikura Ltd. Seating detection switch
US20090152091A1 (en) * 2003-05-20 2009-06-18 Fujikura Ltd. Seating detection switch
US7304256B2 (en) * 2003-05-20 2007-12-04 Fujikura Ltd. Seating detection switch
US8013264B2 (en) 2003-05-20 2011-09-06 Fujikura Ltd. Seating detection switch
US8044311B2 (en) 2003-05-20 2011-10-25 Fujikura Ltd. Seating detection switch
US8053692B2 (en) 2003-05-20 2011-11-08 Fujikura Ltd. Seating detection switch
US8258417B2 (en) 2003-05-20 2012-09-04 Fujikura Ltd. Seating detection switch
US20120125698A1 (en) * 2009-05-29 2012-05-24 Honda Motor Co., Ltd Seating sensor
US9018546B2 (en) * 2009-05-29 2015-04-28 Fujikura Ltd. Seating sensor with compactly arranged elements
US20130192904A1 (en) * 2012-01-26 2013-08-01 Delphi Technologies, Inc. Occupant detection sensor assembly with integrated fasteners
US20190100122A1 (en) * 2017-10-04 2019-04-04 Ford Global Technologies, Llc Waterproof skinned bench seat

Also Published As

Publication number Publication date
GB1358006A (en) 1974-06-26
FR2152950B1 (enrdf_load_stackoverflow) 1976-08-13
FR2152950A1 (enrdf_load_stackoverflow) 1973-04-27
JPS5123698B2 (enrdf_load_stackoverflow) 1976-07-19
AU465177B2 (en) 1975-09-18
DE2245376A1 (de) 1973-04-05
AU4678572A (en) 1974-03-28
CA950949A (en) 1974-07-09
DE2245376B2 (de) 1977-04-28
JPS4838463A (enrdf_load_stackoverflow) 1973-06-06

Similar Documents

Publication Publication Date Title
US3718791A (en) Pressure responsive switch
JP3728711B2 (ja) 着座検出装置
NL194215C (nl) Identificatiekaart met IC-bouwsteen.
US4137116A (en) Method of making a pressure switch
US5828016A (en) Low profile tactile switch
US6906293B2 (en) Combined sensor and heating element
US4172216A (en) Pressure sensitive switch
US4200777A (en) Pressure switch
US4091186A (en) Dry cell battery having electrical spring contact adhered to terminal
US4287394A (en) Keyboard switch assembly with printed circuit board
CN106414164B (zh) 载荷检测传感器单元
US4382165A (en) Membrane keyboard and method of formation thereof
EP0207649A2 (en) Mass terminable flat cable assembly with readily separable ground plane
US3749866A (en) Foam seat sensor
KR960028691A (ko) 전기 접속기
US4574186A (en) Heating sheet
EP0751542A1 (en) Push switch and a method of producing a push switch
US5087799A (en) Power Door sensing strip
KR970054847A (ko) 안테나 커넥터 장치
US3414713A (en) Electrically heated glass closure
US6307168B1 (en) Linear spaced dielectric dot separator pressure sensing array incorporating strain release stabilized releasable electric snap stud connectors
JPS6154119A (ja) 小形スイツチ
CN107097689B (zh) 载荷检测传感器单元
JP3881812B2 (ja) 着座センサ
US4314114A (en) Laminated membrane switch