GB2072950B - Keyboard - Google Patents

Keyboard

Info

Publication number
GB2072950B
GB2072950B GB8108494A GB8108494A GB2072950B GB 2072950 B GB2072950 B GB 2072950B GB 8108494 A GB8108494 A GB 8108494A GB 8108494 A GB8108494 A GB 8108494A GB 2072950 B GB2072950 B GB 2072950B
Authority
GB
United Kingdom
Prior art keywords
keyboard
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
GB8108494A
Other languages
English (en)
Other versions
GB2072950A (en
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.)
Wilhelm Ruf KG
Original Assignee
Wilhelm Ruf KG
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 Wilhelm Ruf KG filed Critical Wilhelm Ruf KG
Publication of GB2072950A publication Critical patent/GB2072950A/en
Application granted granted Critical
Publication of GB2072950B publication Critical patent/GB2072950B/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
    • H01H13/702—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
GB8108494A 1980-04-01 1981-03-18 Keyboard Expired GB2072950B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803012717 DE3012717A1 (de) 1980-04-01 1980-04-01 Tastenfeld

Publications (2)

Publication Number Publication Date
GB2072950A GB2072950A (en) 1981-10-07
GB2072950B true GB2072950B (en) 1984-02-15

Family

ID=6099028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8108494A Expired GB2072950B (en) 1980-04-01 1981-03-18 Keyboard

Country Status (4)

Country Link
DE (1) DE3012717A1 (US07534539-20090519-C00280.png)
FR (1) FR2479551B1 (US07534539-20090519-C00280.png)
GB (1) GB2072950B (US07534539-20090519-C00280.png)
IT (1) IT1194776B (US07534539-20090519-C00280.png)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8313473U1 (de) * 1983-05-06 1986-10-02 Wilhelm Ruf Kg, 8000 Muenchen Tastenfeld
DE3413408C2 (de) * 1984-04-10 1986-05-15 Wilde Membran Impuls Technik GmbH, 5828 Ennepetal Flachtastatur
US4551586A (en) * 1984-06-18 1985-11-05 Motorola, Inc. Multiple contact layer membrane switch
DE3429309A1 (de) * 1984-08-09 1986-02-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Elektronische dateneingabe-tastatur mit galvanische kontakte aufweisenden tasten
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
JPS5072182A (US07534539-20090519-C00280.png) * 1973-08-20 1975-06-14
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 (fr) * 1979-10-19 1986-09-19 Sagem Perfectionnements apportes aux claviers d'introduction manuelle de donnees

Also Published As

Publication number Publication date
GB2072950A (en) 1981-10-07
FR2479551A1 (fr) 1981-10-02
DE3012717C2 (US07534539-20090519-C00280.png) 1987-11-12
IT1194776B (it) 1988-09-28
IT8120845A0 (it) 1981-03-31
DE3012717A1 (de) 1981-10-08
IT8120845A1 (it) 1982-10-01
FR2479551B1 (fr) 1985-11-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930318