Keyboard switch

Details Keyboard switch Keyboard switch

1983-11-28

1985-04-02

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200306, H01H 1376

Patent

active

045089426

ABSTRACT:
A membrane keyboard with a circuit means having a plurality of snap action domes formed therein has a cover sheet thereon. A plurality of cavities formed between the cover sheet and the domed circuit layer has air passages connecting each cavity with the ambient environment. The structure of the present invention permits lower tensile force during actuation and results in improved snap action and tactile feel.

REFERENCES:
patent: 4046975 (1977-09-01), Seeger, Jr.
patent: 4322587 (1982-03-01), Burns et al.
patent: 4415780 (1983-11-01), Daugherty et al.

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