Door locking means

Details Door locking means Door locking means

1975-03-24

1976-12-07

Wolfe, Robert L.

Locks

Parts, attachments, accessories and adjuncts

Condition indicators

70DIG49, E05B 3904

Patent

active

039954641

ABSTRACT:
The invention relates to a door-locking and release system in a building in which system a door is adapted to be held locked by a component removably affixed thereto. Said component is adapted to operate an electrical circuit, such as to deactivate off an alarm circuit, only when detached from the door to provide an indication that the door is in the unlocked condition.

REFERENCES:
patent: 3599454 (1971-08-01), Hill

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