Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1997-07-09
1998-12-08
Friedhofer, Michael A.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200344, H01H 312, H01H 1370
Patent
active
058473378
ABSTRACT:
A computer keyboard key switch including a bottom support board, a key base having a rubber cone, a membrane circuit retained between the bottom support board and the key base, a bridging device supporting plate supported on the key base around the rubber cone, and a key cap coupled to the bridging device supporting plate by a bridging device, wherein the bottom support board has two upright lugs inserted through parallel slots on the membrane circuit and the key base and defining a respective retaining hole; the bridging device supporting plate has two coupling tongues respectively forced into engagement with the retaining holes of the upright lugs of the bottom support board.
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patent: 5625532 (1997-04-01), Sellers
patent: 5630501 (1997-05-01), Tsay
patent: 5695047 (1997-12-01), Tanahashi
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