Locks – Operating mechanism – Key
Patent
1986-06-05
1987-12-29
Wolfe, Robert L.
Locks
Operating mechanism
Key
70367, 70373, E05B 2902
Patent
active
047152010
ABSTRACT:
A cylinder lock with a removable plug incorporates a series of spring biased combinating disc tumblers which cooperate with a first key in normal lock operation. An additional, unbiased control tumbler at the end of the plug cooperates with a retention flange associated with the cylinder to retain the plug against removal from the cylinder while permitting rotation of the plug in the cylinder. The control tumbler includes a notch for receipt of the first key as well as a second, plug removal key. The first key acts against one edge of the notch to displace the control tumbler into a position which ensures that the tumbler will remain engaged with the plug retention flange regardless of the orientation of the plug. The second key includes special bitting adapted to engage a separate second edge of the notch associated with the control tumbler to translate the control tumbler such that when the plug is rotated appropriately, the control tumbler is oriented to slide through an axial or longitudinal groove in the cylinder thus permitting removal of the plug from the cylinder. The lock can also be assembled from a reduced diameter cylindrical plug which cooperates with a two part cylinder that includes a passage to receive the plug and special shaped passages for cooperation with the combinating and locking tumblers.
REFERENCES:
patent: 1333189 (1920-03-01), Shaw
patent: 1433362 (1922-10-01), Freysinger
patent: 1568441 (1926-01-01), Best
patent: 1575092 (1926-03-01), Best
patent: 1805891 (1931-05-01), Shinn
patent: 1854563 (1932-04-01), Shaw
patent: 2061456 (1936-11-01), Falk
patent: 2123940 (1938-07-01), Gray
patent: 2460709 (1949-02-01), Navarro
patent: 2647391 (1953-08-01), Uher
patent: 2766611 (1956-10-01), Hagel
patent: 3197985 (1965-08-01), Cosio
patent: 3298211 (1967-01-01), Russell et al.
patent: 3499209 (1970-03-01), Lavinia
patent: 4398405 (1983-08-01), Patriquin
patent: 4416129 (1983-11-01), Thimot
patent: 4424693 (1984-01-01), Best et al.
Dino Suzanne L.
Valhi Inc.
Wolfe Robert L.
LandOfFree
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