Locks – Operating mechanism – Key
Patent
1986-01-30
1987-03-24
Wolfe, Robert L.
Locks
Operating mechanism
Key
70377, E05B 2904
Patent
active
046515461
ABSTRACT:
A cylinder lock of the rotary disc tumbler and pin tumbler type having an outer cylindrical shell casing, a plug assembly in the said casing including an inner shell member rotatable therein forming a shear line between the casing and shell member and a stack of locking disc tumblers within the shell member. The casing houses a plurality of elongated, axially slidable segmented pin tumblers biased toward the disc tumblers each having a separation line intermediate its length. The disc tumblers each have a stepped bottom peripheral gate alignable with and adapted to receive adjacent portions of the pin tumblers therein to various depths causing pin tumbler portions spaced from said separation line to cross the shear line in a locked position of the plug assembly and are movable by key rotation of the disc tumblers to align their separation lines with the shear line to unlock the plug assembly for rotation.
REFERENCES:
patent: 408147 (1889-07-01), Taylor
patent: 2648972 (1953-08-01), Diesel
patent: 3479849 (1969-11-01), Check
patent: 3531959 (1970-10-01), Weber
patent: 3789638 (1974-02-01), Roberts et al.
patent: 3948065 (1976-04-01), Martikainen
patent: 4008588 (1977-02-01), Miller et al.
patent: 4083212 (1978-04-01), Proefrock
patent: 4359886 (1982-11-01), Evans et al.
patent: 4407147 (1983-10-01), Larson
Gall Lloyd A.
Sargent & Greenleaf, Inc.
Wolfe Robert L.
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