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IT8120845A0 - KEYBOARD. - Google Patents

KEYBOARD.

Info

Publication number
IT8120845A0
IT8120845A0 IT8120845A IT2084581A IT8120845A0 IT 8120845 A0 IT8120845 A0 IT 8120845A0 IT 8120845 A IT8120845 A IT 8120845A IT 2084581 A IT2084581 A IT 2084581A IT 8120845 A0 IT8120845 A0 IT 8120845A0
Authority
IT
Italy
Prior art keywords
keyboard
Prior art date
Application number
IT8120845A
Other languages
Italian (it)
Other versions
IT1194776B (en
IT8120845A1 (en
Inventor
Horst Hoffmann
Original Assignee
Ruf Kg Wilhelm
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 Ruf Kg Wilhelm filed Critical Ruf Kg Wilhelm
Publication of IT8120845A0 publication Critical patent/IT8120845A0/en
Publication of IT8120845A1 publication Critical patent/IT8120845A1/en
Application granted granted Critical
Publication of IT1194776B publication Critical patent/IT1194776B/en

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
    • H01H13/702—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
    • H01H2203/00—Form of contacts
    • H01H2203/026—Form of contacts on different planes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2207/00—Connections
    • H01H2207/012—Connections via underside of substrate
    • 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
    • H01H2229/00—Manufacturing
    • H01H2229/064—Eliminating tolerances
IT20845/81A 1980-04-01 1981-03-31 KEYBOARD IT1194776B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803012717 DE3012717A1 (en) 1980-04-01 1980-04-01 KEYPAD

Publications (3)

Publication Number Publication Date
IT8120845A0 true IT8120845A0 (en) 1981-03-31
IT8120845A1 IT8120845A1 (en) 1982-10-01
IT1194776B IT1194776B (en) 1988-09-28

Family

ID=6099028

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20845/81A IT1194776B (en) 1980-04-01 1981-03-31 KEYBOARD

Country Status (4)

Country Link
DE (1) DE3012717A1 (en)
FR (1) FR2479551B1 (en)
GB (1) GB2072950B (en)
IT (1) IT1194776B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316616A1 (en) * 1983-05-06 1984-11-08 Ruf Kg Wilhelm KEYPAD
DE3413408C2 (en) * 1984-04-10 1986-05-15 Wilde Membran Impuls Technik GmbH, 5828 Ennepetal Flat keyboard
US4551586A (en) * 1984-06-18 1985-11-05 Motorola, Inc. Multiple contact layer membrane switch
DE3429309A1 (en) * 1984-08-09 1986-02-20 Philips Patentverwaltung Gmbh, 2000 Hamburg ELECTRONIC DATA INPUT KEYBOARD WITH KEYS HAVING GALVANIC CONTACTS
US5438177A (en) * 1992-05-06 1995-08-01 Key Tronic Corporation Two-layer membrane switch

Family Cites Families (8)

* 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
US3584162A (en) * 1970-02-16 1971-06-08 Ibm Electrical keyboard switch mechanism with improved resilient diaphragm contact actuator
US3684842A (en) * 1970-07-01 1972-08-15 Texas Instruments Inc Pushbutton keyboard switch assembly with improved over center diaphragm contact
IT1020025B (en) * 1973-08-20 1977-12-20 Northern Electric Co PULSANK SWITCH
US4074088A (en) * 1974-05-21 1978-02-14 Texas Instruments Incorporated Keyboard apparatus and method of making
US4046981A (en) * 1975-12-24 1977-09-06 Texas Instruments Incorporated Keyboard switch with printed wiring board structure and its method of manufacture
JPS54104580A (en) * 1978-02-03 1979-08-16 Canon Kk Thin electronic device
FR2468159B1 (en) * 1979-10-19 1986-09-19 Sagem IMPROVEMENTS TO KEYBOARDS FOR MANUAL INPUT OF DATA

Also Published As

Publication number Publication date
IT1194776B (en) 1988-09-28
FR2479551A1 (en) 1981-10-02
GB2072950A (en) 1981-10-07
FR2479551B1 (en) 1985-11-08
IT8120845A1 (en) 1982-10-01
DE3012717C2 (en) 1987-11-12
DE3012717A1 (en) 1981-10-08
GB2072950B (en) 1984-02-15

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