Door locking mechanism

Details Door locking mechanism Door locking mechanism

1976-06-04

1977-05-31

Moore, Richard E.

Closure fasteners

Keepers

With movable dog, catch or striker

292DIG49, E05C 314

Patent

active

040265897

ABSTRACT:
A door lock has both its dead bolt and spring latch released by the action of a single keeper. The keeper has two stable limit positions, i.e. it opens the strike case, or it closes the strike case. The keeper is held in its open position allowing the door to be opened and closed if the solenoid of the keeper was energized and if the dead bolt was in extended position at the time the door was opened. If the solenoid of the keeper is deenergized and if only the spring latch was extended, the keeper returns to locked condition once the latch bolt has cleared the strike, because the keeper is still biased to its second stable or closed position. In that position the keeper is then locked by the bias spring inside the keeper acting on the latch bolt.

REFERENCES:
patent: 3638984 (1972-02-01), Davidson
patent: 3819215 (1974-06-01), Fuss
patent: 3822904 (1974-07-01), Peterson

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