Locking device

Details Locking device Locking device

1988-07-29

1990-02-20

Gall, Lloyd A.

Closure fasteners

Bolts

Sliding

292172, 292254, E05C 106

Patent

active

049020528

ABSTRACT:
A locking device for doors and the like, having a bolt installed in the door frame and movable into the open position by a solenoid and into the shut position by a spring. Locking devices of this kind have not found general use, since there is no room in the frame for a device as required by the regulations wherewith the lock may be opened mechanically from the inside. This problem has been solved in such a manner that the socket of the door has a counterbolt forced by a spring against the bolt proper, whereby the spring force of the spring of the counterbolt is smaller than the spring force of the spring of the bolt.

REFERENCES:
patent: 1089324 (1914-03-01), Chesley
patent: 1968285 (1934-07-01), Egan
patent: 2366847 (1945-01-01), Fendring
patent: 3614147 (1971-10-01), Spector
patent: 3872696 (1975-03-01), Geringer
patent: 3998483 (1976-12-01), Yan
patent: 4132439 (1979-01-01), Millar
patent: 4271691 (1981-06-01), Logan

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