Cylinder lock with key, incorporating a picking preventing means

Details Cylinder lock with key, incorporating a picking preventing means Cylinder lock with key, incorporating a picking preventing means

1985-05-24

1987-08-04

Wolfe, Robert L.

Locks

Operating mechanism

Key

70364A, 70420, 70421, E05B 1506

Patent

active

046837400

ABSTRACT:
A cylinder lock with key, incorporating a picking preventing means, comprises a plug mounted rotatably within the cylindrical seat of a lock cylinder and has a first set of holes lying on a radial plane. The holes accommodate pins which cooperate with tumbler pins accommodated in a second set of holes formed in the cylinder and being aligned with the first set of holes. A longitudinal key slot extends through the plug which is in communication with the first set of holes and has a longitudinal rib arranged to project thereinto to provide support for the pins. The rib conceals the ends of the pins resting thereon, and defines an intersection of the longitudinal key slot with the cylindrical portions of said first set of holes accommodating said pins. One of the pins has the same length as the hole accommodating it, thereby if deceitfully shifted, it will unavoidably engage the hole of the respective tumbler pin and produce a locked condition of the lock.

REFERENCES:
patent: 2049548 (1936-08-01), Swanson
patent: 3045468 (1962-07-01), Welch et al.
patent: 3777520 (1973-12-01), Crepinsek
patent: 3974670 (1976-08-01), Wolter
patent: 4221121 (1980-09-01), Tietz
patent: 4320638 (1982-03-01), Dunphy et al.
patent: 4321811 (1982-03-01), Ziegler

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