Door latch

Details Door latch Door latch

1976-05-24

1977-04-12

Moore, Richard E.

Closure fasteners

Extension link

Slotted bar

292259R, 70 93, E05C 1704

Patent

active

040171043

ABSTRACT:
A door latch for providing security in addition to that afforded by conventional key operated locks. A bar holds the door in its locked position and cooperates with a swingable plate for holding the door in a partially opened position.

REFERENCES:
patent: 924277 (1909-06-01), Saphier
patent: 1524088 (1925-01-01), Ernst
patent: 1596183 (1926-08-01), Horlich, Jr.
patent: 1673189 (1928-06-01), Frank et al.
patent: 2683049 (1954-07-01), Van Der Spek
patent: 3458226 (1969-07-01), Carlston
patent: 3690709 (1972-09-01), Bogusz

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