Locking device

Details Locking device Locking device

1990-04-09

1991-07-09

Nicholson, Eric K.

Closure fasteners

Bolts

Sliding

292144, 292254, 29216913, 29234116, 2922515, E05C 112

Patent

active

050299123

ABSTRACT:
A locking device has a trigger bolt for fastening a dead bolt and can be released by actuating a cooperating assembly placed in a door frame from a remote control room. A lock case placed in a door includes a turnable inner operating element provided with an inside thumb-turn operable from the inside, a turnable outer operating element provided with an outside thumb-turn operable from the outside, a turning lever drivable by the operating element, a dead bolt movable forwards to lock and backwards to unlock by the action of the turning lever, and a locking device for locking the dead bolt in a locking position. The locking device is released by turning the inner operating element in case of unlocking the dead bolt by turning the inner operating element, and the locking device is remotely released so as to allow the movement of turning lever in case of unlocking the dead bolt by using the outer operating element and a fix component assembly placed in a door frame cooperates with the locking mechanism assembly in the door and an electrical device is remotely operable to release the locking device.

REFERENCES:
patent: 3758142 (1973-09-01), Gartner
patent: 3829138 (1974-08-01), Morita
patent: 4355830 (1982-10-01), Rau, III
patent: 4376379 (1983-03-01), Gotanda
patent: 4399673 (1983-08-01), Gotanda
patent: 4529234 (1985-07-01), Senften
patent: 4679834 (1987-07-01), Gotanda
patent: 4840050 (1989-06-01), Gotanda
Japanese Published Application 1-151669, 6/14/89, Gotanda, pp. 399-406.

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