Keyboard switch with printed wiring board structure and its meth

Details Keyboard switch with printed wiring board structure and its meth Keyboard switch with printed wiring board structure and its meth

1975-12-24

1977-09-06

Scott, James R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 5A, 200275, 200292, 200302, H01H 1370, H01H 900

Patent

active

040469816

ABSTRACT:
A printed wiring board comprised of a plurality of keys or switches, which form a keyboard, for entry of data or changing the function of an electrical circuit. Each key comprises a flexible conductive actuating element and at least two conductive contacts which are affixed in a nonplanar relationship to the substrate of a printed wiring board. The actuating element is caused to come in contact with the conductive contacts when the actuating element is depressed, thus closing the switch.

REFERENCES:
patent: 2262777 (1941-11-01), Roper
patent: 3133170 (1964-05-01), Nanninga
patent: 3684842 (1972-08-01), Boulanger
patent: 3749859 (1973-07-01), Webb et al.
patent: 3796843 (1974-03-01), Durkee et al.
patent: 3800104 (1974-03-01), Lien et al.
patent: 3806673 (1974-04-01), Boulanger
patent: 3934334 (1976-01-01), Hanni
patent: 3952174 (1976-04-01), Boulanger et al.
patent: 3967084 (1976-06-01), Pounds
patent: 3973091 (1976-08-01), Kaminski

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