Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1984-04-13
1985-08-20
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200 6A, 200159B, 200339, H01H 1370
Patent
active
045366250
ABSTRACT:
Electrical switch keyboards comprise a one-piece mat made of resilient material laid in sealing engagement upon a frame within which switching elements are positioned to operate in conjunction with key portions of the mat. The mat is the uppermost layer of the keyboard and comprises the key portions connected by integral spring portions to frame positioning portions. Operation elements carried on integral extensions depending from the key portions of the mat function with the switching elements in the frame to produce switching currents upon actuation of the key portions.
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Palmer Carroll F.
Scott J. R.
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