CA1153801A - Pressure sensitive electronic device - Google Patents

Pressure sensitive electronic device

Info

Publication number
CA1153801A
CA1153801A CA000365569A CA365569A CA1153801A CA 1153801 A CA1153801 A CA 1153801A CA 000365569 A CA000365569 A CA 000365569A CA 365569 A CA365569 A CA 365569A CA 1153801 A CA1153801 A CA 1153801A
Authority
CA
Canada
Prior art keywords
conductors
support member
conductor
disposed
switch apparatus
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
Application number
CA000365569A
Other languages
English (en)
French (fr)
Inventor
Franklin N. Eventoff
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US06/097,610 external-priority patent/US4268815A/en
Priority claimed from US06/110,416 external-priority patent/US4276538A/en
Priority claimed from US06/135,386 external-priority patent/US4301337A/en
Priority claimed from US06/140,937 external-priority patent/US4314228A/en
Priority claimed from US06/140,921 external-priority patent/US4315238A/en
Application filed by Individual filed Critical Individual
Priority to CA000404065A priority Critical patent/CA1153803A/en
Priority to CA000404064A priority patent/CA1153802A/en
Priority to CA000404062A priority patent/CA1161921A/en
Priority to CA000404063A priority patent/CA1153577A/en
Publication of CA1153801A publication Critical patent/CA1153801A/en
Application granted granted Critical
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/807—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the spatial arrangement of the contact sites, e.g. superimposed sites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/785—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/80—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the manner of cooperation of the contacts, e.g. with both contacts movable or with bounceless contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/703—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by spacers between contact carrying layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/002—Contacts bounceless
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/032—Conductive polymer; Rubber
    • H01H2201/036—Variable resistance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/012—Microprotrusions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/02—Interspersed fingers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/026—Spacers without separate element
    • H01H2211/032—Pressure sensitive layer on contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2213/00—Venting
    • H01H2213/002—Venting with external pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2213/00—Venting
    • H01H2213/016—Venting in adhesive layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/008—Part of substrate or membrane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/008—Actuators other then push button
    • H01H2221/02—Actuators other then push button pneumatic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/002—Switch site location superimposed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/006—Switch site location more then one pole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H01H2227/012—Conductive rubber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H01H2227/012—Conductive rubber
    • H01H2227/014—Conductive particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/002—Screen printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/012—Vacuum deposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/014—Electro deposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/024—Packing between substrate and membrane
    • H01H2229/028—Adhesive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/038—Folding of flexible printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/018—Musical instrument
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/016—Miscellaneous combined with start switch, discrete keyboard
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/078—Variable resistance by variable contact area or point
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/07—Electric key switch structure

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Push-Button Switches (AREA)
  • Measuring Fluid Pressure (AREA)
  • Manufacture Of Switches (AREA)
CA000365569A 1979-11-26 1980-11-26 Pressure sensitive electronic device Expired CA1153801A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA000404063A CA1153577A (en) 1979-11-26 1982-05-28 Pressure sensitive electronic device
CA000404065A CA1153803A (en) 1979-11-26 1982-05-28 Pressure sensitive electronic device
CA000404062A CA1161921A (en) 1979-11-26 1982-05-28 Pressure sensitive electronic device
CA000404064A CA1153802A (en) 1979-11-26 1982-05-28 Pressure sensitive electronic device

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US06/097,610 US4268815A (en) 1979-11-26 1979-11-26 Multi-function touch switch apparatus
US97,610 1979-11-26
US110,416 1980-01-07
US06/110,416 US4276538A (en) 1980-01-07 1980-01-07 Touch switch keyboard apparatus
US135,386 1980-03-31
US06/135,386 US4301337A (en) 1980-03-31 1980-03-31 Dual lateral switch device
US06/140,921 US4315238A (en) 1979-09-24 1980-04-16 Bounceless switch apparatus
US140,921 1980-04-16
US140,937 1980-04-16
US06/140,937 US4314228A (en) 1980-04-16 1980-04-16 Pressure transducer

Publications (1)

Publication Number Publication Date
CA1153801A true CA1153801A (en) 1983-09-13

Family

ID=27536842

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000365569A Expired CA1153801A (en) 1979-11-26 1980-11-26 Pressure sensitive electronic device

Country Status (8)

Country Link
AU (1) AU544234B2 (de)
CA (1) CA1153801A (de)
DE (1) DE3044384C2 (de)
FR (1) FR2470435B1 (de)
GB (4) GB2064873B (de)
IT (1) IT1143185B (de)
NL (1) NL8006409A (de)
SE (1) SE452925B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8674932B2 (en) 1996-07-05 2014-03-18 Anascape, Ltd. Image controller
US9081426B2 (en) 1992-03-05 2015-07-14 Anascape, Ltd. Image controller

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566363A (en) * 1983-03-02 1986-01-28 Casio Computer Co., Ltd. Electronic musical instrument
US4680432A (en) * 1984-08-07 1987-07-14 Casio Computer Co., Ltd. Compact electronic device
US4554033A (en) * 1984-10-04 1985-11-19 Amp Incorporated Method of forming an electrical interconnection means
DE3446327A1 (de) * 1984-12-19 1986-06-26 Telefunken Electronic Gmbh Widerstandselement mit schaum-kunststoff
US4617608A (en) * 1984-12-28 1986-10-14 At&T Bell Laboratories Variable gap device and method of manufacture
JPS61239299A (ja) * 1985-04-16 1986-10-24 ヤマハ株式会社 電子打楽器
US4965421A (en) * 1985-09-26 1990-10-23 John Fluke Mfg. Co., Inc. Particulate spacers for touch sensitive overlay panel applications
CN1010143B (zh) * 1985-09-26 1990-10-24 约翰弗兰克制造公司 供触敏涂覆层使用的粒子垫片
US4794366A (en) * 1985-11-15 1988-12-27 Toshiba Silicone Co., Ltd. Key-touch sensor and method of manufacture
DE3624166A1 (de) * 1986-07-17 1988-01-21 Schoeller & Co Elektrotech Folienschaltung
GB2225660A (en) * 1988-12-05 1990-06-06 Autoliv Dev A trigger circuit arrangement for a vehicle safety device, eg a crash bag
EP0489344A1 (de) * 1990-12-03 1992-06-10 I.E.E. International Electronics & Engineering S.à.r.l. Verfahren zur Identifikation einer gedrückten Taste einer Tastatur
FR2692419B1 (fr) * 1992-01-24 1997-05-16 Fusilier Jean Marie Application d'un clavier plat a touches progressives a la telecommande sans fil d'une unite fonctionnelle.
DE4216349C2 (de) * 1992-05-17 1994-06-09 Reinhold Fahrion Elektronisches Musikinstrument mit einer Melodie- und einer Begleittastatur
DE4237072C1 (de) * 1992-11-03 1993-12-02 Daimler Benz Ag Resistiver Foliendrucksensor
DE4332927C2 (de) * 1993-09-28 1995-06-29 Schurter Gmbh Piezo-Schaltelement
WO1995022828A1 (en) * 1994-02-17 1995-08-24 Interlink Electronics, Inc. Layered pressure sensitive transducer and method for making same
DE19530092A1 (de) * 1995-08-16 1997-02-20 Daimler Benz Ag Überprüfbarer Foliendrucksensor
JPH10155593A (ja) * 1996-11-28 1998-06-16 Aisin Seiki Co Ltd 感圧スイッチ
JP3962959B2 (ja) * 1996-12-20 2007-08-22 アイシン精機株式会社 感圧スイッチ
DE19748485A1 (de) * 1997-11-03 1999-05-06 Todor Dimitriev Taste mit regulierbaren Nachklang für Musikinstrumente
DE10247404B4 (de) * 2002-10-04 2007-10-18 T & T Medilogic Medizintechnik Gmbh Sensor zum Erfassen von Kräften nach Größe und Richtung und daraus gebildete Druckmessplatte
DE112004002994A5 (de) 2004-12-08 2007-10-31 Abb Patent Gmbh Verfahren zur Herstellung eines Messumformers
US7468199B2 (en) 2004-12-23 2008-12-23 3M Innovative Properties Company Adhesive membrane for force switches and sensors
US7260999B2 (en) 2004-12-23 2007-08-28 3M Innovative Properties Company Force sensing membrane
US7509881B2 (en) 2005-07-29 2009-03-31 3M Innovative Properties Company Interdigital force switches and sensors
EP2006869A1 (de) * 2007-06-22 2008-12-24 IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A. Schaltelement in folienbauweise

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GB371504A (en) * 1930-02-06 1932-04-28 Andre Becq Improvements in or relating to pressure-regulated apparatus, particularly pressure gauges
GB608669A (en) * 1945-12-19 1948-09-20 Speed Marketing Company Sussex Improvements in fluid pressure operated switches
US3122617A (en) * 1960-10-07 1964-02-25 Kollsman Instr Corp Pressure control switch
GB969167A (en) * 1962-03-26 1964-09-09 Karl Torsten Kalle A device for transmitting impulses
GB1209647A (en) * 1966-11-28 1970-10-21 Matsushita Electric Ind Co Ltd Electro-mechanical transducer element
US3806471A (en) * 1968-04-29 1974-04-23 R Mitchell Pressure responsive resistive material
US3551616A (en) * 1969-01-15 1970-12-29 Ibm Multiple switch encoding device
US3503031A (en) * 1969-02-11 1970-03-24 Control Data Corp Printed circuit keyboard
US3626350A (en) * 1969-02-20 1971-12-07 Nippon Musical Instruments Mfg Variable resistor device for electronic musical instruments capable of playing monophonic, chord and portamento performances with resilient contact strips
BE756130A (fr) * 1969-09-15 1971-03-15 Essex International Inc Combinaison interrupteur-coupe-circuit sensible a la pression
US3617660A (en) * 1970-01-23 1971-11-02 Ibm Keyboard actuating mechanism for diaphragm electric switch contact array
US3617666A (en) * 1970-04-30 1971-11-02 Data Appliance Corp Pressure-operated layered electrical switch and switch array
US3758733A (en) * 1971-10-04 1973-09-11 Essex International Inc Ric material and conductive particles therein pressure sensitive stepping switches with multi layer spring contact assembly with interposed layers of lubricated non-conductive elastome
US3968336A (en) * 1974-09-23 1976-07-06 Xerox Corporation Keyboard switch assembly having movable contact, and supporting helicline type legs disposed co-planar to common conductive sheet
US4085302A (en) * 1976-11-22 1978-04-18 Control Data Corporation Membrane-type touch panel
FR2443129A1 (fr) * 1978-11-29 1980-06-27 Serras Paulet Edouard Dispositif de commutation electrique ou electronique formant bouton-poussoir ou clavier a touches enfoncables
FR2443130A1 (fr) * 1978-11-29 1980-06-27 Serras Paulet Edouard Clavier de commande de dispositifs electriques ou electroniques
DE2902769C2 (de) * 1979-01-25 1982-12-09 Rudolf Schadow Gmbh, 1000 Berlin Drucktastenschalter
GB2071420B (en) * 1980-03-12 1984-08-08 Int Computers Ltd Retractive mechanical switches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9081426B2 (en) 1992-03-05 2015-07-14 Anascape, Ltd. Image controller
US8674932B2 (en) 1996-07-05 2014-03-18 Anascape, Ltd. Image controller

Also Published As

Publication number Publication date
DE3044384C2 (de) 1994-05-11
AU6467980A (en) 1981-06-04
SE452925B (sv) 1987-12-21
GB2134322A (en) 1984-08-08
GB2134320A (en) 1984-08-08
GB2134320B (en) 1985-05-01
GB8322859D0 (en) 1983-09-28
SE8008205L (sv) 1981-05-27
FR2470435A1 (fr) 1981-05-29
GB2134321B (en) 1985-05-01
GB2134321A (en) 1984-08-08
NL8006409A (nl) 1981-06-16
DE3044384A1 (de) 1981-08-27
IT1143185B (it) 1986-10-22
FR2470435B1 (fr) 1985-06-14
GB8318533D0 (en) 1983-08-10
GB2134322B (en) 1985-05-01
GB8318534D0 (en) 1983-08-10
GB2064873B (en) 1984-09-05
GB2064873A (en) 1981-06-17
IT8050239A0 (it) 1980-11-25
AU544234B2 (en) 1985-05-23

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