Electric lock

Details Electric lock Electric lock

1975-02-10

1976-05-25

Hohauser, Herman

Electricity: circuit makers and breakers

High-potential type

Rotating and pivoted

B60N 2504

Patent

active

039596133

ABSTRACT:
The electric lock of the present invention comprises two sets of contact assemblies mounted within a housing, one of the sets being responsive to a master key, and the other being responsive to a pass key for opening the lock. The assemblies each comprise a set of opening contacts corresponding to the protrusions on the keys and a set of alarm contacts positioned to set off an alarm in the event the wrong key is used or in the event an attempt is made to pick the lock.

REFERENCES:
patent: 3348220 (1967-10-01), Luna et al.
patent: 3415087 (1968-12-01), Kramasz, Jr. et al.
patent: 3793500 (1974-02-01), Gerber
patent: 3873891 (1975-03-01), Gerber

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