Locks – Operating mechanism – Combination
Patent
1998-08-07
2000-10-17
Barrett, Suzanne Dino
Locks
Operating mechanism
Combination
70323, 70314, 70329, E05B 3700
Patent
active
061314285
ABSTRACT:
A combination of the inventive combination lock can be easily and conveniently changed by the user. A clutch selectively disengages the drive tumbler from the lock spindle. With the drive tumbler disengaged and the tumblers in an aligned position, the user rotates the lock knob by a desired increment, thereby changing all of the numbers by the increment. In one embodiment, the clutch is operated by a cup mounted around the drive cam and engaging the drive tumbler, a spring biasing the drive tumbler against the cup and the drive cam, and the cup carrying a button that, when pressed, moves the drive tumbler out of engagement with the drive cam. In another embodiment, the clutch is operated by a thumb screw projecting through a rear panel of the combination lock that moves an upper part of the drive cam out of engagement with a lower part of the drive cam, allowing relative rotation of the lock dial and the drive tumbler.
REFERENCES:
patent: 142529 (1873-09-01), Stockwell
patent: 1644650 (1927-10-01), Millice
patent: 1887797 (1932-11-01), Borzin
patent: 2775115 (1956-12-01), Bremer
patent: 2925726 (1960-02-01), Miller
patent: 3801761 (1974-04-01), Green
patent: 3991596 (1976-11-01), Gartner
patent: 4123923 (1978-11-01), Bako
patent: 4376380 (1983-03-01), Burgess
patent: 4468943 (1984-09-01), Beattie
patent: 4512167 (1985-04-01), Remenicky
patent: 4693100 (1987-09-01), Wetz, Jr.
patent: 4708006 (1987-11-01), Hodgson
patent: 4722207 (1988-02-01), Wertz, Jr.
patent: 4776190 (1988-10-01), Miller et al.
patent: 5009090 (1991-04-01), Beattie
patent: 5184491 (1993-02-01), Schittenhelm
patent: 5575164 (1996-11-01), Ohsawa
Barrett Suzanne Dino
John D. Brush & Co., Inc.
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