Universal keypad assembly

Details Universal keypad assembly Universal keypad assembly

1996-07-22

1998-03-31

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200512, 200313, H01H 1370

Patent

active

057341370

ABSTRACT:
A pair of electrical contacts are provided on a lower surface of each key in a keypad assembly. When a key is depressed, the contacts are brought into electrical communication with a common conductive surface such that an electrical circuit is completed between a discrete pair of terminals. The arrangement, number, and configuration of keys can be changed without modifying the decoding logic and supporting circuitry of a keypad-operated instrument.

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patent: 4180711 (1979-12-01), Hirata et al.
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patent: 4314115 (1982-02-01), Sado et al.
patent: 4460810 (1984-07-01), Fukukura
patent: 4609792 (1986-09-01), Levasseur
patent: 4640994 (1987-02-01), Komaki
patent: 4694126 (1987-09-01), Aiken, Jr. et al.
patent: 4847452 (1989-07-01), Inaba
patent: 5149923 (1992-09-01), Demeo

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