Dead bolt lock

Details Dead bolt lock Dead bolt lock

1979-01-25

1981-06-16

Frazier, Roy D.

Locks

Special application

For closures

70134, 70370, 70450, 70451, E05B 906, E05B 6506, E05C 106

Patent

active

042729742

ABSTRACT:
A key operated dead bolt lock includes one or a pair of standard threaded mortise cylinders. The lock further includes set screws, inaccessible from either side of a door in which the lock is installed, which prevent rotation of the cylinders. The cylinders hold cylinder collars in place to prevent access to the bolt from the side.

REFERENCES:
patent: 1846364 (1932-02-01), Schlage
patent: 2042021 (1936-05-01), Schlage
patent: 2357552 (1944-09-01), Schlage
patent: 3011817 (1961-12-01), Eads
patent: 3036850 (1962-05-01), Schmid
patent: 3606422 (1971-09-01), Hennessy
patent: 3699788 (1972-10-01), Gerlach et al.
patent: 3948066 (1976-04-01), Solovieff
patent: 3950974 (1976-04-01), Alexander
patent: 3992908 (1976-11-01), Crepinsek

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