Pivoting latch and lock

Details Pivoting latch and lock Pivoting latch and lock

1974-07-11

1976-04-20

Nunberg, Casmir A.

Closure fasteners

Bolts

Double acting

292 78, 292192, 292201, 292210, E05C 306, E05C 322, E05C 500, E05C 1902

Patent

active

039514420

ABSTRACT:
A pivoting latch and lock for a door hinged in a frame having a strike aperture has a detent latch that can be moved out of the strike opening merely by pulling the door open unless the detent latch is specially blocked against such movement. In one embodiment a frame is installed on the door and presents an edge opening. Normally spring-projected partly through the edge opening is a detent latch having a central body carrying one or more pivot lugs guiding rotation of the detent latch about one or more axes located within the frame and alongside the detent latch. The detent latch has a surface associated with each axis so shaped as to clear the frame opening when the latch is rotated about that axis. A lever is pivoted on the frame to move into and out of a position blocking rotation of the detent latch. The lever may be operated by a solenoid or electromagnet. If desired, the same electrical device can move the two levers of duplicate pivoting latches.

REFERENCES:
patent: 307281 (1884-10-01), Farrar
patent: 326626 (1885-09-01), Chubb et al.
patent: 776073 (1904-11-01), Levy
patent: 788193 (1905-04-01), Dovas
patent: 2752184 (1956-06-01), Hammond
patent: 3583737 (1971-06-01), Tutikawa
patent: 3652113 (1972-03-01), Odend'hal et al.

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