Keyboard switch

Details Keyboard switch Keyboard switch

1983-11-28

1985-03-05

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, H01H 1370

Patent

active

045032947

ABSTRACT:
A membrane keyboard is presented wherein a series of slits are provided through the switch sheet and disposed above the switch motion cavity whereby the required actuating forces are decreased for switch operational areas of small size relative to those switch operational areas of larger size.

REFERENCES:
patent: 3627935 (1971-12-01), Spievak
patent: 3777082 (1973-12-01), Hatley et al.
patent: 3800104 (1974-03-01), Lien et al.
patent: 4029916 (1977-06-01), Chu
patent: 4032729 (1977-06-01), Koistinen
patent: 4084071 (1978-04-01), Smith
patent: 4245138 (1981-01-01), Harper
patent: 4400595 (1983-08-01), Ahumada

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