Electricity: circuit makers and breakers – Switch activation inhibitor – Combined with connector coupling
Patent
1981-01-16
1983-06-28
Shepperd, John W.
Electricity: circuit makers and breakers
Switch activation inhibitor
Combined with connector coupling
200159B, 200 44, 70277, 307 10AT, 340543, 34082532, H01H 2710, H01H 2700
Patent
active
043907580
ABSTRACT:
A key-actuated locking device is used with a key having a plurality of spaced-apart teeth which define a pattern. The locking device includes a key passageway into which the key is inserted with predetermined orientation. A plurality of elastomeric conductors are positioned proximate the passageway and are selectively compressed by the teeth of the key when the key is inserted into the key passageway. A plurality of pairs of separated conductors are also supported by a base (such as a printed circuit board). Each conductor pair is positioned to be engaged and conductively connected by one of the elastomeric conductors when that elastomeric conductor is connected by a tooth of the key. A circuit is connected to the separated conductor pairs which permits operation of a lock mechanism when all of the proper elastomeric conductors (corresponding to the required pattern of teeth on the key) are compressed and all other elastomeric conductors are not compressed.
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