Randomly and integrally re-keyable lock apparatus and method

Details Randomly and integrally re-keyable lock apparatus and method Randomly and integrally re-keyable lock apparatus and method

1987-03-27

1988-05-31

Wolfe, Robert L.

Locks

Operating mechanism

Key

70384, 70385, E05B 2500

Patent

active

047472812

ABSTRACT:
A lock apparatus includes a key-in-knob lock, padlock or other type of 90.degree. lock provided with a cylindrical plug having a keyway for receiving a master key that has bittings for positioning a master pin in the top portion of a first pinway with the bottom of the master pin aligned with the shear interface to unlock the lock. The plug has a guideway at the surface thereof and angularly displaced from the keyway less than 180.degree. for receiving the master pin during re-keying. A blocking rod is received in the guideway for normal, non-re-keying use of the lock. After removal of the rod from the guideway, a transfer tool is slidable into the guideway. The tool has a cut for receiving the master pin from the first pinway. The tool slides relative to the guideway and moves the master pin in the guideway to directly reposition the master pin adjacent a randomly selected second pinway. A handle rotates the tool relative to the guideway to cam the master pin out of the cut into the second pinway to change the height of the pin stack in the second pinway to randomly and integrally re-key the lock without removal of the master pin from the lock or disassembly of the lock.

REFERENCES:
patent: 1896319 (1933-02-01), Littell
patent: 3059462 (1962-10-01), Check
patent: 3431757 (1969-03-01), Hori
patent: 4412437 (1983-11-01), Smith

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