Locks – Operating mechanism – Combination
Patent
1984-12-31
1987-09-22
Smith, Gary L.
Locks
Operating mechanism
Combination
70323, 70303A, 292 34, E05B 3708
Patent
active
046946705
ABSTRACT:
A combined key and combination lock herein having a housing fixed to a door which mounts a linear key lock mechanism including spring biased pins or tumblers displaced and aligned by a coded key and a rotary combination lock mechanism including notched or keyed disks selectively aligned by rotation of a numerical dial via a disk transfer mechanism. Shaft and gear members intercouple the key lock mechanism with combination lock mechanism with combination lock mechanism for cooperatively operating a latch bolt to a lock position while a resilient bias device returns the latch bolt to an unlock position. A clutch mechanism selectively disengages the key lock mechanism from the combination lock mechanism so that the numerical dial on the inside of the door may be used solely for unlatching the bolt from its lock position. A releasable stop plunger is spring biased on the housing for disabling both the key lock mechanism and the combination lock mechanism to retain the bolt in its lock position.
REFERENCES:
patent: 2081271 (1937-05-01), Ellithorpe
patent: 2575674 (1951-11-01), Miller
patent: 2722820 (1955-11-01), Coffey
patent: 2766606 (1956-10-01), Whitehead
patent: 2766608 (1956-10-01), Hirn
patent: 2897376 (1959-07-01), Rieckman
patent: 3416337 (1968-12-01), Hutchins
patent: 3455125 (1969-07-01), Silva
patent: 3559430 (1971-02-01), Waller
patent: 3616667 (1971-11-01), McGourty
patent: 3903718 (1975-09-01), Fish
patent: 4398470 (1983-08-01), Williams et al.
patent: 4470277 (1984-09-01), Uyeda
patent: 4574603 (1986-03-01), Parma
Luong Vinh
Marrs Roger A.
Smith Gary L.
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