Randomly and integrally re-keyable lock apparatus and method

Locks – Operating mechanism – Key

Patent

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Details

70384, 70385, E05B 2500

Patent

active

047124016

ABSTRACT:
A lock apparatus includes a lock provided with a cylindrical plug having a keyway widened to form a slot adjacent the bottom surface of the plug for receiving a master pin from a top pinway of the lock. The slot has shoulders at the opposite ends thereof to prevent removal of the master pin from the lock. If the lock has been assembled, the plug is removed to facilitate forming the slot, removing any ribs that are at the bottom of the keyway and inserting a master pin between the driver pin and the tumbler pin in a first one of the pinways.
A transfer key has bittings for positioning the master pin in the top portion of the first pinway with the bottom of the master pin aligned with the shear interface. A transfer tool is slidable relative to the transfer key on the side thereof opposite to the bittings and has a cut for receiving the master pin from the first pinway. The tool slides relative to the transfer key and moves the master pin in the slot to directly reposition the master pin adjacent a randomly selected second pinway. A handle rotates the tool relative to the transfer key 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: 1819853 (1931-08-01), Von Mehren
patent: 1896319 (1933-02-01), Littell
patent: 2113007 (1938-04-01), Swanson
patent: 2326358 (1943-08-01), Hull
patent: 2910860 (1959-11-01), Camba
patent: 3070987 (1963-01-01), Baker et al.
patent: 3078705 (1963-02-01), Morrison, Jr.
patent: 3125878 (1964-03-01), Gutman
patent: 3320781 (1967-05-01), Hill
patent: 3589153 (1971-06-01), Hill
patent: 3667262 (1972-06-01), Hill
patent: 4412437 (1983-11-01), Smith
patent: 4440009 (1984-04-01), Smith

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