Combination lock with code protection device

Details Combination lock with code protection device Combination lock with code protection device

1998-02-13

1999-07-27

Boucher, Darnell M.

Locks

Operating mechanism

Combination

70 68, 70316, 70DIG44, E05B 3702

Patent

active

059271132

ABSTRACT:
A combination lock with code protection device is provided. The lock includes a casing mounted with conventional numeral dials, a pair of posts capable of mounting the tabs of a single double zipper fastener or a dual double zipper fastener, a rotatable switch covering the posts when the lock is in locked position and uncovering the posts when the lock is in unlocked position and a detent rotatably disposed into a circular hole for checking a slide for facilitating the changing of a new combination code for the lock. This disclosure is characterized in the protection of the combination code old or new from disturbed by unintentional rotation of the dials.

REFERENCES:
patent: 2163852 (1939-06-01), Pond
patent: 3597945 (1971-08-01), Feinberg
patent: 4155234 (1979-05-01), Bako
patent: 4742700 (1988-05-01), Ling
patent: 4884419 (1989-12-01), Ling
patent: 5136864 (1992-08-01), Spiekermann et al.
patent: 5359867 (1994-11-01), Ling et al.
patent: 5520032 (1996-05-01), Ling
patent: 5557954 (1996-09-01), Ling
patent: 5560232 (1996-10-01), Chen
patent: 5689979 (1997-11-01), Yu

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