Lock cylinder

Details Lock cylinder Lock cylinder

1977-10-13

1980-04-08

Wolfe, Robert L.

Locks

Operating mechanism

Key

70419, E05B 2706

Patent

active

041966040

ABSTRACT:
A pick-proof lock cylinder is disclosed wherein a set of lock pins accommodates the cut notches of a key and biasing means are angularly disposed to the lock pins to abut and hold the ends of the pins in locking positions. Attempts to pick the set of pins are frustrated by the interference of the biasing means. The biasing means are offset to the axis of the locking pins so that upon withdrawal of the key, the biasing means keeps the locking pins in raised condition. At least one of the locking pins is in abutment with a driver pin, so that the driver pin is disposed outside the shear line of the lock cylinder in its housing, and whereupon key insertion, the lock pin driver pin abutment line is coincident with the lock cylinder shear line so as to permit rotation of the cylinder in its housing.

REFERENCES:
patent: 2022070 (1935-11-01), Williams
patent: 3590615 (1971-07-01), Schultz
patent: 3798938 (1974-03-01), McCullom

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