Lock opening device

Details Lock opening device Lock opening device

1978-07-17

1980-02-05

Wolfe, Robert L.

Locks

Operating mechanism

Key

33174F, E05B 1920

Patent

active

041865774

ABSTRACT:
A device for opening a lock without the use of a key cut to the specific tumbler configuration of the lock, said device comprising a holder having a key blank corresponding to the key slot formed in the lock core mounted at one end thereof. A resilient member is secured to the key blank in such a position that it will engage the tumblers of the lock when the key blank is inserted into the key slot. In addition, a means is secured to the holder for engaging the lock housing in which said core rotates on the side thereof opposite the location of the tumblers and for urging the key blank and core against said engaged side in a manner such that the width of the shear line between the core and lock housing will be increased at the location of the tumblers. By adjusting the alignment of the key blank within the lock core, the spring-loaded tumblers will be caused to deform the resilient member at various depths until they are brought into the desired alignment along the shear line betwen the core and lock housing thereby permitting the rotation of the core within said lock housing.

REFERENCES:
patent: 2720032 (1955-10-01), Harwell
patent: 2727312 (1955-12-01), Tampke
patent: 3827151 (1974-08-01), Naill

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