AT314232B - Keypad for membrane switches - Google Patents

Keypad for membrane switches

Info

Publication number
AT314232B
AT314232B AT525571A AT525571A AT314232B AT 314232 B AT314232 B AT 314232B AT 525571 A AT525571 A AT 525571A AT 525571 A AT525571 A AT 525571A AT 314232 B AT314232 B AT 314232B
Authority
AT
Austria
Prior art keywords
keypad
membrane switches
switches
membrane
Prior art date
Application number
AT525571A
Other languages
German (de)
Original Assignee
Internat Business Maschines Co
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 Internat Business Maschines Co filed Critical Internat Business Maschines Co
Application granted granted Critical
Publication of AT314232B publication Critical patent/AT314232B/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
    • H01H2209/00—Layers
    • H01H2209/006—Force isolators
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/05—Force concentrator; Actuating dimple
AT525571A 1970-01-23 1971-06-17 Keypad for membrane switches AT314232B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US543170A 1970-01-23 1970-01-23
US5128470A 1970-06-30 1970-06-30

Publications (1)

Publication Number Publication Date
AT314232B true AT314232B (en) 1974-03-25

Family

ID=26674355

Family Applications (1)

Application Number Title Priority Date Filing Date
AT525571A AT314232B (en) 1970-01-23 1971-06-17 Keypad for membrane switches

Country Status (2)

Country Link
AT (1) AT314232B (en)
CH (1) CH518595A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071718A (en) * 1976-10-22 1978-01-31 Bowmar Instrument Corporation Flat keyboard assembly having cover type membrane with protrusions to align switch components
US4520248A (en) * 1980-08-15 1985-05-28 Rogers Corporation Keyboard assembly

Also Published As

Publication number Publication date
CH518595A (en) 1972-01-31

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee