Closure fasteners – Extension link – Chain
Patent
1994-06-17
1995-10-31
Lindsey, Rodney M.
Closure fasteners
Extension link
Chain
292285, E05C 1736
Patent
active
054623197
ABSTRACT:
A lock for an inswinging door which includes a retainer plate secured to the door jamb by elongated screws extending into and securely anchored to a wall stud or other secure anchor internally of a wall structure. The retaining plate is relatively thin and is positioned between the free edge of the inswinging door and the door jamb with an end edge thereof projecting inwardly beyond the inner surface of the door and door jamb for receiving a locking plate. The end of the retaining plate and locking plate include a unique interrelationship in order that the locking plate can be positioned on the retaining plate in a secure but readily assembled and releasable manner with a substantial portion of the locking plate overlying the inner surface of the door and another substantial portion of the locking plate overlying the door jamb. The locking plate is circular and has a central opening and a lateral passageway communicating therewith for supporting engagement with the inner end portion of the retaining plate and rotatable into locking position. A tether chain is attached to a portion of the locking plate and to a wall bracket with upward force exerted on the tether chain causing rotational movement of the locking plate to automatically release the locking plate from the retaining plate thereby enabling rapid removal of the locking plate from its locking position in the event of an emergency and also enabling handicapped persons and young children to easily release the locking plate.
REFERENCES:
patent: 393163 (1888-11-01), Lee
patent: 866548 (1907-09-01), Wilkinson
patent: 4106800 (1978-08-01), Nakanishi
patent: 4856831 (1989-08-01), Roden, Jr.
patent: 5098142 (1991-11-01), Fontenot
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