DE2861435D1 - Depressible contactless key for generating electric signals in an electronic keyboard - Google Patents

Depressible contactless key for generating electric signals in an electronic keyboard

Info

Publication number
DE2861435D1
DE2861435D1 DE7878300393T DE2861435T DE2861435D1 DE 2861435 D1 DE2861435 D1 DE 2861435D1 DE 7878300393 T DE7878300393 T DE 7878300393T DE 2861435 T DE2861435 T DE 2861435T DE 2861435 D1 DE2861435 D1 DE 2861435D1
Authority
DE
Germany
Prior art keywords
depressible
electric signals
generating electric
electronic keyboard
contactless key
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
DE7878300393T
Other languages
German (de)
Inventor
Franco Dr Varesio
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.)
Telecom Italia SpA
Olivetti SpA
Original Assignee
Olivetti SpA
Ing C Olivetti and C SpA
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
Application filed by Olivetti SpA, Ing C Olivetti and C SpA filed Critical Olivetti SpA
Application granted granted Critical
Publication of DE2861435D1 publication Critical patent/DE2861435D1/en
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
    • H01H13/785—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
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/10—Adjustable resistors adjustable by mechanical pressure or force
    • H01C10/106—Adjustable resistors adjustable by mechanical pressure or force on resistive material dispersed in an elastic 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
    • 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
    • H01H2207/00—Connections
    • H01H2207/008—Adhesive means; Conductive adhesive
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Push-Button Switches (AREA)
DE7878300393T 1977-11-07 1978-09-18 Depressible contactless key for generating electric signals in an electronic keyboard Expired DE2861435D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6948677A IT1091947B (en) 1977-11-07 1977-11-07 ELASTOMERIC MATERIAL CONDUCTOR UNDER PRESSURE

Publications (1)

Publication Number Publication Date
DE2861435D1 true DE2861435D1 (en) 1982-02-04

Family

ID=11312229

Family Applications (1)

Application Number Title Priority Date Filing Date
DE7878300393T Expired DE2861435D1 (en) 1977-11-07 1978-09-18 Depressible contactless key for generating electric signals in an electronic keyboard

Country Status (3)

Country Link
EP (1) EP0001882B1 (en)
DE (1) DE2861435D1 (en)
IT (1) IT1091947B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5641618A (en) * 1979-09-14 1981-04-18 Nissan Motor Picture display switch
JPS5846532A (en) * 1981-09-16 1983-03-18 東レ株式会社 Transparent panel switch structure and switch unit
DE3543890C2 (en) * 1985-12-12 1994-11-17 Thomson Brandt Gmbh Keyboard
US5216316A (en) * 1989-12-18 1993-06-01 Ralph Ipcinski Piezo electric transducer
US5455556A (en) * 1991-08-20 1995-10-03 Key Tronic Corporation Single station cursor device suitable for keyboards

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1298089A (en) * 1969-02-24 1972-11-29 William Barber Sudduth Electric switch made of conducting elastomer
DE1939642B2 (en) * 1969-08-04 1975-01-09 Standard Elektrik Lorenz Ag, 7000 Stuttgart Switch based on linear pressure for bounce-free switching
CH547007A (en) * 1972-04-06 1974-03-15 Wifo Forschungsinst Ag PRESSURE-SENSITIVE ELECTRIC SWITCH, IN PARTICULAR FOR LOW CURRENT OR SIGNAL CURRENT.
CH553066A (en) * 1972-04-26 1974-08-30 Battelle Memorial Institute METHOD OF MANUFACTURING AN ANISOTROPIC ELECTRIC CONDUCTIVITY TAPE.
US4292261A (en) * 1976-06-30 1981-09-29 Japan Synthetic Rubber Company Limited Pressure sensitive conductor and method of manufacturing the same

Also Published As

Publication number Publication date
EP0001882A1 (en) 1979-05-16
EP0001882B1 (en) 1981-12-09
IT1091947B (en) 1985-07-06

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee