Keyboard switch assembly having multilayer printed circuit struc

Details Keyboard switch assembly having multilayer printed circuit struc Keyboard switch assembly having multilayer printed circuit struc

1975-05-02

1976-12-07

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159A, 200275, 200292, 174 685, 317101B, H01H 900, H01H 1352, H05K 100

Patent

active

039964302

ABSTRACT:
An ultrasonic remote control device of the type having an integrated switching network formed in a multilayer printed circuit and mechanical switching means whereby at least some of the circuit connection paths intersect in a cross connection matrix with the switching means manually operable to connect each intersecting path to a common potential, for example ground.

REFERENCES:
patent: 3133170 (1964-05-01), Nanninga
patent: 3240885 (1966-03-01), Grunfelder et al.
patent: 3584162 (1971-06-01), Krakinowski
patent: 3600528 (1971-08-01), Leposavic
patent: 3617666 (1971-11-01), Braue
patent: 3742157 (1973-06-01), Leposavic
patent: 3796843 (1974-03-01), Durkee et al.
patent: 3800104 (1974-03-01), Lien et al.
patent: 3806673 (1974-04-01), Boulanger
patent: 3831063 (1974-08-01), Keough
patent: 3856998 (1974-12-01), Sims, Jr.
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3870840 (1975-03-01), Rivetta et al.
patent: 3886012 (1975-05-01), Slater

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