Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1987-08-05
1988-09-06
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200 5A, 235145R, 400479, 400485, 400488, H01H 1370
Patent
active
047695161
ABSTRACT:
A keyboard includes a plurality of keys thereon, each of which is capable of three different switching actions for entry of data or commands into a word processor, typewriter, computer or the like. Each key includes a first inclined surface for generating a first switching action responsive to finger contraction, a second inclined surface for generating a second switching action responsive to finger extension, and a horizontal surface for actuating a third switching action responsive to finger depression. Each key is connected to a respective switch. Each switch includes a carriage operating horizontally against spring-loaded horizontal plugs. The carriage houses a spring-loaded vertical stem attached to the respective key. In one embodiment each key-switch combination is substantially identical to the other. The base is formed into different levels upon which key-switch combinations are mounted.
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