US3699294A - Keyboard, digital coding, switch for digital logic, and low power detector switches - Google Patents
Keyboard, digital coding, switch for digital logic, and low power detector switches Download PDFInfo
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- US3699294A US3699294A US144453A US3699294DA US3699294A US 3699294 A US3699294 A US 3699294A US 144453 A US144453 A US 144453A US 3699294D A US3699294D A US 3699294DA US 3699294 A US3699294 A US 3699294A
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- elements
- sheet
- elastomer
- switch
- conductive
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- Expired - Lifetime
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Images
Classifications
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- 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
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- 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
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- 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
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2201/00—Contacts
- H01H2201/016—Roughened contact surface, e.g. anti-adhering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01H2201/00—Contacts
- H01H2201/022—Material
- H01H2201/032—Conductive polymer; Rubber
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- H—ELECTRICITY
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- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/014—Layers composed of different layers; Lubricant in between
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- H01H2209/03—Properties of the substrate elastomeric
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- H—ELECTRICITY
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- H01H2209/00—Layers
- H01H2209/046—Properties of the spacer
- H01H2209/052—Properties of the spacer elastomeric
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
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- H01H2209/068—Properties of the membrane
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- H—ELECTRICITY
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- H01H2215/00—Tactile feedback
- H01H2215/002—Longer travel
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- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2217/00—Facilitation of operation; Human engineering
- H01H2217/006—Different feeling for different switch sites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2217/00—Facilitation of operation; Human engineering
- H01H2217/012—Two keys simultaneous considerations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2217/00—Facilitation of operation; Human engineering
- H01H2217/016—Pressure reduction membrane; Spreader layer
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- H01—ELECTRIC ELEMENTS
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- H01H2223/00—Casings
- H01H2223/002—Casings sealed
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- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2223/00—Casings
- H01H2223/034—Bezel
- H01H2223/036—Bezel forming chamfered apertures for keys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2223/00—Casings
- H01H2223/046—Casings convertible
- H01H2223/052—Casings convertible reductible in size, e.g. for transportation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2225/00—Switch site location
- H01H2225/018—Consecutive operations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2227/00—Dimensions; Characteristics
- H01H2227/002—Layer thickness
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/022—Modular assembly
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/002—Calculator, computer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/038—Level sensing or limit switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/05—Card, e.g. credit card
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/026—Internal encoding, e.g. validity bit
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Push-Button Switches (AREA)
Abstract
Description
Claims (32)
- 2. The switch of claim 1 wherein said elastomer is carbon filled.
- 3. The switch of claim 1 wherein said sheet means has substantially the electrical resistance of carbon filled silicone and fluorosilicone elastomers.
- 4. An electric switch for producing a signal for use by solid state electronic digital logic circuitry, said switch comprising at least one pair of contact elements and a resilient, movable electrically conductive bridge means made of elastomer with conductive particles distributed therethrough, said bridge means spaced adjacent but apart from said elements so that motion of said bridge means against said elements will cause said elements to be connected conductively through the particle-containing elastomer to provide a bridging conductive path and reverse movement of said bridge means will cause said bridge means to disconnect from said elements and open the path between the elements, the switch enabling production of a signal without electrical bounce effects.
- 5. The switch of claim 4 wherein said particles are of nonmetallic conductive material, limiting the conductivity of said path.
- 6. The switch of claim 5 wherein said particles comprise carbon filler in said elastomer.
- 7. The switch of claim 4 wherein said elements comprise printed circuits secured to a printed circuit board, and non-moving portions of elastomer integral with said bridge means are supported by said board in an insulated condition relative to said printed circuits, said portions retaining said bridge means in said spaced position in the absence of pressure applied against said bridge means.
- 8. The switch of claim 4 wherein neighboring portions of elastomer integral with said bridge means extend to various sides of said bridge means and, together with said bridge means comprising a sheet means, the direction of movement of said bridge means being normal to the direction of extent of the sheet means and the conductivity path between said contact elements being in the direction of said extent.
- 9. The switch of claim 8 wherein the elastomer portion defining said bridge means is sized for deflection by a finger of the human hand.
- 10. An electric switch comprising in combination contact means, resilient, flexible electrically conductive sheet means of electrically conductive elastomer and positioning means positioning said sheet means so that a first portion of said sheet means is adjacent but apart from said contact means, and said first portion free to move relative to neighboring portions of said sheet means whereby pressure applied against said first portion will cause it to connect to said contact means conductively, and release of said pressure will cause said portion of said sheet means to disconnect from said contact means.
- 11. The electric switch of claim 10 wherein said neighborinG portions support said first portion in said spaced apart position in the absence of external operating pressure.
- 12. The electric switch of claim 10 wherein there are a plurality of electrical contact elements, said sheet means including a plurality of sheet portions positioned over respective electrical contact elements, said respective portions being free to move and press against respective contact elements in response to pressure applied to said portions.
- 13. The electric switch of claim 12 wherein said contact elements comprise part of a printed circuit.
- 14. The switch of claim 12 useful as a detector wherein said contact elements when connected by said sheet means all complete the same circuit to a pair of terminals whereby pressure at any of said portions of said sheet means can complete the same circuit.
- 15. The switch of claim 10 adapted for manual pressure on said portion, said portion being covered by an insulating layer.
- 16. The switch of claim 15 wherein said insulating layer is in the form of a button accessible to the finger.
- 17. The switch of claim 16 wherein said insulating layer comprises an elastomer forming a button shape, said button shape being resiliently deformable, providing for travel of the finger between the time of contact with such button and the time the button is deformed against said sheet means sufficient to apply actuating pressure.
- 18. The switch of claim 17 wherein said button is a hollow, thin-walled member.
- 19. The switch of claim 15 including an outer member having an opening exposing to the finger said insulating layer for application of actuating pressure to said portion.
- 20. An electric switch assembly comprising in combination a non-conductive base carrying a printed circuit means which defines circuit contact elements at a spaced plurality of locations; portions of electrically conductive, resilient elastomer; means positioning elastomer portions adjacent but apart from respective contact elements; the respective elastomer portions being free to move and press against the respective contact elements in response to pressure applied to said portions, said switch adapted for actuation by externally applied pressure on said portions, said portions associated with outer insulative pressure transmitting means.
- 21. The electric switch of claim 20 wherein said elastomer portions comprise carbon filled elastomer, so that pressure applied against a said portion will cause it to connect said element with limited conductivity and release of pressure will cause said portion to disconnect from said element.
- 22. The electric switch of claim 20 wherein said elastomer comprises a homogeneous body of elastomer and electrically conductive particles distributed therethrough.
- 23. The switch assembly of claim 20 wherein each movable portion of conductive elastomer is integral with neighboring portions of elastomer held so that resilient deflection of said elastomer occurs between said movable and neighboring portions during application of said externally applied pressure, providing a return force upon release of said pressure.
- 24. An electric switch comprising in combination at least one pair of circuit contact elements and a resilient, flexible, electrically conductive, elastomeric sheet means of electrically conductive silicone elastomer spaced adjacent but apart from said elements so that pressure applied against said sheet means will cause it to connect said elements conductively thus providing a bridging conductive path and release of pressure will cause said sheet means to disconnect from said elements and open the path between the elements.
- 25. A keyboard assembly comprising in combination resilient, flexible, electrically conductive, elastomeric sheet means, an insulating separator sheet below said conductive sheet means, and an electrical circuit board below said separator sheet and having contact elements; said separator sheet having openings registrable with said elements so that pressure applied aGainst the portion of said conductive sheet means above an opening will cause it to press against a said element causing it to connect to said element conductively, and release of said pressure will cause said sheet means to disconnect from said element.
- 26. A keyboard assembly comprising in combination resilient, flexible, electrically conductive, elastomeric sheet means, an insulating separator sheet below said conductive sheet means, and an electrical circuit board below said separator sheet and having a plurality of pairs of spaced contact elements; said separator sheet having openings registrable with said pairs of elements so that pressure applied against the portion of said conductive sheet means above an opening will cause it to press against the pair of contact elements causing it to connect said elements conductively thus providing a bridging conductive path, and release of said pressure will cause said conductive portion to disconnect from said elements and open the path between the elements.
- 27. The keyboard assembly of claim 26 wherein said conductive sheet means is provided on its outer surface with an insulating layer at least in the area of said openings.
- 28. The keyboard assembly of claim 26 wherein said conductive means is provided on its outer surface with buttons registrable with said openings.
- 29. A digital coding assembly comprising in combination a resilient, flexible, electrically conductive elastomeric sheet means, an insulating separator layer below said sheet means and having a selected pattern of apertures and an electrical circuit board below said layer and having on its upper surface a common circuit element interlaced with a plurality of individual circuit elements, pressure applied against the portion of the conductive sheet means above the pattern of apertures causing that portion to provide a bridging conductive path from the common circuit element to each circuit element exposed by the apertures and release of said pressure causing opening of said path.
- 30. The device of claim 29, wherein the conducting pattern for all said circuit elements is on said upper surface.
- 31. The device of claim 29 wherein said common circuit element comprises a series of parallel branches with each said individual circuit element being disposed between a different pair of said branches.
- 32. The device of claim 29 wherein all apertures are arranged so that one special circuit element is always connected to the common element by depression of the conductive sheet means at any actuation point.
- 33. The device of claim 32 wherein apertures which provide contact with said special element are smaller than the unit aperture for the other circuit elements, thus providing for a delayed action.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14445371A | 1971-05-18 | 1971-05-18 |
Publications (1)
Publication Number | Publication Date |
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US3699294A true US3699294A (en) | 1972-10-17 |
Family
ID=22508654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US144453A Expired - Lifetime US3699294A (en) | 1971-05-18 | 1971-05-18 | Keyboard, digital coding, switch for digital logic, and low power detector switches |
Country Status (1)
Country | Link |
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US (1) | US3699294A (en) |
Cited By (133)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3760137A (en) * | 1970-10-05 | 1973-09-18 | Alps Electric Co Ltd | Matrix push-button switch |
US3761944A (en) * | 1971-01-22 | 1973-09-25 | Alps Electric Co Ltd | Binary code generator |
US3789167A (en) * | 1972-12-20 | 1974-01-29 | Chomerics Inc | Multi-output level keyboard switch assembly with improved operator and contact structure |
US3798639A (en) * | 1973-01-03 | 1974-03-19 | Epoch Co Ltd | Encoding switch for educational device |
US3806685A (en) * | 1972-10-04 | 1974-04-23 | Chromerics Inc | Linear cam slide switch with guide means and conductive sheet contact |
US3808384A (en) * | 1971-06-01 | 1974-04-30 | Texas Instruments Inc | Pushbutton keyboard system |
US3818153A (en) * | 1971-07-27 | 1974-06-18 | T Arvai | Pushbutton switch assembly for keyboards including a bridging conductive, elastomeric diaphragm type contact |
US3819895A (en) * | 1972-10-04 | 1974-06-25 | Lectradate Inc | Electronic momentary switch |
JPS4985931U (en) * | 1972-11-14 | 1974-07-25 | ||
JPS4986383U (en) * | 1972-11-16 | 1974-07-26 | ||
US3854018A (en) * | 1973-06-14 | 1974-12-10 | Amp Inc | Multiple circuit selector switch assembly having movable contact means adapted to retain itself in closed circuit position |
US3860771A (en) * | 1973-10-29 | 1975-01-14 | Chomerics Inc | Keyboard switch assembly with dome shaped actuator having associated underlying contactor means |
US3862381A (en) * | 1973-10-29 | 1975-01-21 | Chomerics Inc | Keyboard switch assembly with multilayer, coextensive contactor means |
US3862382A (en) * | 1973-10-29 | 1975-01-21 | Chomerics Inc | Keyboards switch assembly with multilayer pattern contact means |
JPS5035263U (en) * | 1973-07-25 | 1975-04-15 | ||
US3879593A (en) * | 1971-07-09 | 1975-04-22 | Magic Dot Inc | Membrane switch |
JPS5044177U (en) * | 1973-08-21 | 1975-05-02 | ||
JPS5051365A (en) * | 1973-09-05 | 1975-05-08 | ||
JPS5070834U (en) * | 1973-10-30 | 1975-06-23 | ||
JPS5073883U (en) * | 1973-11-09 | 1975-06-28 | ||
US3908100A (en) * | 1974-03-25 | 1975-09-23 | Gen Signal Corp | Touch blend smooth surface switch assembly |
US3911780A (en) * | 1972-07-17 | 1975-10-14 | Hammond Corp | Arpeggio keyboard |
US3916360A (en) * | 1974-08-09 | 1975-10-28 | Singer Co | Magnetic keyboard |
US3917917A (en) * | 1973-08-23 | 1975-11-04 | Alps Electric Co Ltd | Keyboard pushbutton switch assembly having multilayer contact and circuit structure |
US3930083A (en) * | 1974-07-26 | 1975-12-30 | Litton Systems Inc | Keyboard panel for an electric switch contact |
JPS51371A (en) * | 1974-06-19 | 1976-01-06 | Matsushita Electric Ind Co Ltd | |
US3944763A (en) * | 1974-11-01 | 1976-03-16 | Beierwaltes Richard R | Swimming pool touch pad |
JPS5138078A (en) * | 1974-09-28 | 1976-03-30 | Citizen Watch Co Ltd | |
US3959610A (en) * | 1974-12-13 | 1976-05-25 | Motorola, Inc. | Hermetically sealed keyboard type assembly with elastomeric electrical connecting link between switch and component modules |
US3964594A (en) * | 1972-12-01 | 1976-06-22 | Ing. C. Olivetti & C., S.P.A. | Keyboard of elastic material for office machines |
JPS5193258A (en) * | 1975-02-14 | 1976-08-16 | ||
US3996429A (en) * | 1975-04-18 | 1976-12-07 | Northern Electric Company Limited | Multi-contact push-button switch having plural prestressed contact members designed to provide plural circuit simultaneous switching inputs |
US4002892A (en) * | 1973-09-15 | 1977-01-11 | Zielinski Adolf H | Portable calculator |
US4017697A (en) * | 1975-09-15 | 1977-04-12 | Globe-Union Inc. | Keyboard membrane switch having threshold force structure |
US4021630A (en) * | 1975-04-25 | 1977-05-03 | Neomed Incorporated | Hermetically sealed resilient contact switch having surgical applications |
US4029916A (en) * | 1975-04-18 | 1977-06-14 | Northern Electric Company Limited | Multi-contact push-button switch and plural embodiment for keyboard switch assembly |
US4029915A (en) * | 1974-12-12 | 1977-06-14 | Hoshidenkoseizo Kabushiki Kaisha | Miniaturized calculator keyboard switch assembly having universally pivoted key actuators |
US4032738A (en) * | 1975-05-15 | 1977-06-28 | Neomed Incorporated | Electro-surgical instrument |
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US3760137A (en) * | 1970-10-05 | 1973-09-18 | Alps Electric Co Ltd | Matrix push-button switch |
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US3818153A (en) * | 1971-07-27 | 1974-06-18 | T Arvai | Pushbutton switch assembly for keyboards including a bridging conductive, elastomeric diaphragm type contact |
US3911780A (en) * | 1972-07-17 | 1975-10-14 | Hammond Corp | Arpeggio keyboard |
US3806685A (en) * | 1972-10-04 | 1974-04-23 | Chromerics Inc | Linear cam slide switch with guide means and conductive sheet contact |
US3819895A (en) * | 1972-10-04 | 1974-06-25 | Lectradate Inc | Electronic momentary switch |
JPS4985931U (en) * | 1972-11-14 | 1974-07-25 | ||
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JPS4986383U (en) * | 1972-11-16 | 1974-07-26 | ||
US3964594A (en) * | 1972-12-01 | 1976-06-22 | Ing. C. Olivetti & C., S.P.A. | Keyboard of elastic material for office machines |
US4039068A (en) * | 1972-12-14 | 1977-08-02 | Ing. C. Olivetti & C., S.P.A. | Keyboard of elastic material for office machines |
US3789167A (en) * | 1972-12-20 | 1974-01-29 | Chomerics Inc | Multi-output level keyboard switch assembly with improved operator and contact structure |
US3798639A (en) * | 1973-01-03 | 1974-03-19 | Epoch Co Ltd | Encoding switch for educational device |
US3854018A (en) * | 1973-06-14 | 1974-12-10 | Amp Inc | Multiple circuit selector switch assembly having movable contact means adapted to retain itself in closed circuit position |
US4044642A (en) * | 1973-07-23 | 1977-08-30 | Arp Instruments, Inc. | Touch sensitive polyphonic musical instrument |
JPS5035263U (en) * | 1973-07-25 | 1975-04-15 | ||
JPS5044177U (en) * | 1973-08-21 | 1975-05-02 | ||
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US3917917A (en) * | 1973-08-23 | 1975-11-04 | Alps Electric Co Ltd | Keyboard pushbutton switch assembly having multilayer contact and circuit structure |
JPS5051365A (en) * | 1973-09-05 | 1975-05-08 | ||
US4002892A (en) * | 1973-09-15 | 1977-01-11 | Zielinski Adolf H | Portable calculator |
US3862382A (en) * | 1973-10-29 | 1975-01-21 | Chomerics Inc | Keyboards switch assembly with multilayer pattern contact means |
US3862381A (en) * | 1973-10-29 | 1975-01-21 | Chomerics Inc | Keyboard switch assembly with multilayer, coextensive contactor means |
US3860771A (en) * | 1973-10-29 | 1975-01-14 | Chomerics Inc | Keyboard switch assembly with dome shaped actuator having associated underlying contactor means |
JPS5342016Y2 (en) * | 1973-10-30 | 1978-10-11 | ||
JPS5070834U (en) * | 1973-10-30 | 1975-06-23 | ||
JPS5073883U (en) * | 1973-11-09 | 1975-06-28 | ||
JPS5642900Y2 (en) * | 1973-11-09 | 1981-10-07 | ||
US3908100A (en) * | 1974-03-25 | 1975-09-23 | Gen Signal Corp | Touch blend smooth surface switch assembly |
JPS51371A (en) * | 1974-06-19 | 1976-01-06 | Matsushita Electric Ind Co Ltd | |
JPS5625635B2 (en) * | 1974-06-19 | 1981-06-13 | ||
US3930083A (en) * | 1974-07-26 | 1975-12-30 | Litton Systems Inc | Keyboard panel for an electric switch contact |
US3916360A (en) * | 1974-08-09 | 1975-10-28 | Singer Co | Magnetic keyboard |
JPS5138078A (en) * | 1974-09-28 | 1976-03-30 | Citizen Watch Co Ltd | |
US3944763A (en) * | 1974-11-01 | 1976-03-16 | Beierwaltes Richard R | Swimming pool touch pad |
US4029915A (en) * | 1974-12-12 | 1977-06-14 | Hoshidenkoseizo Kabushiki Kaisha | Miniaturized calculator keyboard switch assembly having universally pivoted key actuators |
US3959610A (en) * | 1974-12-13 | 1976-05-25 | Motorola, Inc. | Hermetically sealed keyboard type assembly with elastomeric electrical connecting link between switch and component modules |
JPS5193258A (en) * | 1975-02-14 | 1976-08-16 | ||
US4096577A (en) * | 1975-03-03 | 1978-06-20 | Ferber Leon A | Thin flexible electronic calculator |
US4114000A (en) * | 1975-03-03 | 1978-09-12 | Motorola, Inc. | Multi-position switch with single sliding actuator cam, reciprocable cam follower and compressive conductive elastomer |
US4029916A (en) * | 1975-04-18 | 1977-06-14 | Northern Electric Company Limited | Multi-contact push-button switch and plural embodiment for keyboard switch assembly |
US3996429A (en) * | 1975-04-18 | 1976-12-07 | Northern Electric Company Limited | Multi-contact push-button switch having plural prestressed contact members designed to provide plural circuit simultaneous switching inputs |
US4021630A (en) * | 1975-04-25 | 1977-05-03 | Neomed Incorporated | Hermetically sealed resilient contact switch having surgical applications |
US4032738A (en) * | 1975-05-15 | 1977-06-28 | Neomed Incorporated | Electro-surgical instrument |
US4017697A (en) * | 1975-09-15 | 1977-04-12 | Globe-Union Inc. | Keyboard membrane switch having threshold force structure |
US4055735A (en) * | 1975-10-23 | 1977-10-25 | Honeywell Information Systems Inc. | Touch sensitive device |
US4057710A (en) * | 1976-03-29 | 1977-11-08 | Willmott Arthur S | Keyboard assembly |
JPS5817269Y2 (en) * | 1976-05-20 | 1983-04-07 | セイコーエプソン株式会社 | Exterior structure of electronic clock with calculator |
JPS52155574U (en) * | 1976-05-20 | 1977-11-25 | ||
US4184321A (en) * | 1976-05-20 | 1980-01-22 | Kabushiki Kaisha Suwa Seikosha | Electronic wristwatch with calculator having improved conductive packing sheet switch element |
US4201043A (en) * | 1976-07-16 | 1980-05-06 | Kabushiki Kaisha Suwa Seikosha | Wristwatch calculator imput key positioning assembly |
US4287394A (en) * | 1976-07-31 | 1981-09-01 | Wilhelm Ruf Kg | Keyboard switch assembly with printed circuit board |
US4164634A (en) * | 1977-06-10 | 1979-08-14 | Telaris Telecommunications, Inc. | Keyboard switch assembly with multiple isolated electrical engagement regions |
USRE32747E (en) * | 1977-08-31 | 1988-09-13 | Braun Aktiengesellschaft | Synthetic-resin and metallic layered housing for hand-held appliance |
US4388509A (en) * | 1977-08-31 | 1983-06-14 | Braun Ag | Synthetic-resin and metallic layered housing for hand-held appliance |
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US4259551A (en) * | 1978-03-15 | 1981-03-31 | Citizen Watch Co., Ltd. | External operation device for electronic timepieces |
US4207443A (en) * | 1978-03-17 | 1980-06-10 | Mikado Precision Industries Ltd. | Key-operated switch and an assemblage of such switches for electronic desk calculators or the like |
US4261042A (en) * | 1978-03-28 | 1981-04-07 | Canon Kabushiki Kaisha | Key signal entering device for thin electronic apparatus |
US4234813A (en) * | 1978-04-10 | 1980-11-18 | Toray Industries, Inc. | Piezoelectric or pyroelectric polymer input element for use as a transducer in keyboards |
US4228329A (en) * | 1978-06-26 | 1980-10-14 | Hitachi, Ltd. | Compact keyboard structure |
US4242546A (en) * | 1978-11-06 | 1980-12-30 | International Telephone And Telegraph Corporation | Electrical push-button switch |
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US4258096A (en) * | 1978-11-09 | 1981-03-24 | Sheldahl, Inc. | Composite top membrane for flat panel switch arrays |
FR2446535A1 (en) * | 1979-01-10 | 1980-08-08 | Siemens Ag | Elasticised contact material for relay spring set - has flexible contact with ingrained conductor on changeover spring set |
US4317012A (en) * | 1979-04-26 | 1982-02-23 | Nissan Motor Company, Limited | Display board type switching device |
US4347504A (en) * | 1979-08-24 | 1982-08-31 | Nissan Motor Co., Ltd. | Device for detecting a burnt-out fuse |
US4314227A (en) * | 1979-09-24 | 1982-02-02 | Eventoff Franklin Neal | Electronic pressure sensitive transducer apparatus |
US4300029A (en) * | 1980-01-09 | 1981-11-10 | W. H. Brady Co. | Remote membrane switch |
US4317013A (en) * | 1980-04-09 | 1982-02-23 | Oak Industries, Inc. | Membrane switch with universal spacer means |
US4375018A (en) * | 1980-06-16 | 1983-02-22 | Sheldahl, Inc. | Membrane switch having adhesive label as edge seal |
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US4376239A (en) * | 1980-10-03 | 1983-03-08 | Allen-Bradley Company | Industrial membrane switch |
US4350857A (en) * | 1980-10-03 | 1982-09-21 | Allen-Bradley Company | Illuminated industrial membrane switch |
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