Lock

Details Lock Lock

1978-06-08

1980-10-14

Frazier, Roy D.

Locks

Special application

For closures

70120, 70131, 70431, 70DIG43, 292144, 292 32, 292157, E05B 6302, E05B 6312, E05B 6314, E05C 100

Patent

active

042273862

ABSTRACT:
A safety or "dead-bolt" lock includes a lockably releasable sliding bolt assembly of a first magnetic polarity. The keeper element, which is adapted to be mounted on to a jamb is of a second or opposite magnetic polarity to magnetically attract the bolt. A key lock assembly is used to release the sliding bar from movement. A cover is slidably movable over the entire lock assembly to prevent unauthorized dislodgement.

REFERENCES:
patent: 377983 (1888-02-01), Bohannan
patent: 1107297 (1914-08-01), Grossmann
patent: 1373678 (1921-04-01), Siemer
patent: 2021803 (1935-11-01), Nichols
patent: 2103989 (1937-12-01), Machinist
patent: 2137002 (1938-11-01), Fehr
patent: 2219186 (1940-10-01), Hornfeck
patent: 2461676 (1949-02-01), Budak
patent: 3768284 (1973-10-01), Kent et al.
patent: 3785188 (1974-01-01), Drathschmidt
patent: 3796071 (1974-03-01), Crepinsek

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