Safety groove of tubular locks

Details Safety groove of tubular locks Safety groove of tubular locks

1983-04-05

1985-10-15

Wolfe, Robert L.

Locks

Operating mechanism

Key

70419, E05B 2708

Patent

active

045466297

ABSTRACT:
A cylinder lock which prevents picking is disclosed. The lock comprises an outer shell having a cavity therein, a plug having a hole and a plurality of circumferential apertures extending partially through the plug, with grooves around the openings of the apertures. The plug is snugly disposed in the cavity. Spring biased pins are slidably received in the plug apertures. The cylinder lock also has a shaft member disposed in the cavity with a flange portion extending outwardly from said shaft member. The flange portion has a plurality of apertures with grooves around the openings of the apertures which face the plug. The apertures extend through the flange portion, and are alignable with the apertures of the plug. The shaft member passes through the hole of the plug, and is adapted to be rotated. The flange portion fits snugly in the cavity. Pins are slidably received in the flange portion apertures.

REFERENCES:
patent: 2202329 (1940-05-01), Braune
patent: 2283489 (1942-05-01), Crousore
patent: 2629249 (1953-02-01), Mendelsohn

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