Automatic sliding door latch

Details Automatic sliding door latch Automatic sliding door latch

1991-02-06

1991-12-03

Nicholson, Eric K.

Closure fasteners

Bolts

Spring arm

292DIG46, E05C 1906

Patent

active

050694928

ABSTRACT:
An automatic sliding door or window latching device which includes a hook attached to a door or window jamb immediately opposite the door or window frame where a merchanism containing a bendable plate having a hole in the center thereof is placed. When the door or window is pushed closed, the plate moves up over the hook until the opening is reached at which point said plate snaps firmly against said hook. The plate is attached to an axle and corresponding handles such that when one of said handles is turned, the plate moves away from said hook, unlatching the door or window. In order to avoid deforming the plate during use, the range of rotation of said handles may be limited according to the size of an opening into which a tab attached to a key slided over said axle is displaced.

REFERENCES:
patent: 46472 (1865-02-01), Jenks
patent: 530078 (1894-12-01), Ammerman
patent: 2926037 (1960-02-01), Granzow
patent: 2978757 (1961-04-01), Ammerman
patent: 3065985 (1962-11-01), Du Four
patent: 3140889 (1964-07-01), Sanders
patent: 3827738 (1974-08-01), Dushane, Jr.
patent: 3877739 (1975-04-01), Cowen

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