Cylinder-lock with flat key

Details Cylinder-lock with flat key Cylinder-lock with flat key

1980-11-14

1983-03-22

Wolfe, Robert L.

Locks

Operating mechanism

Key

70395, 70398, 70409, E05B 1908, E05B 1912, E05B 2710

Patent

active

043770827

ABSTRACT:
The invention relates to a cylinder-lock having a flat key comprising a shank having at least one profile longitudinal groove extending from the end thereof to accommodate a rib in the key-channel of the cylinder-lock, said shank including fixed key bits adapted to index pin-tumblers in the cylinder-lock, said key including in the area of the wide side of the shank an additional movable key bit, said movable key bit being adapted to be controlled by a shoulder in the key-channel such that when the key is inserted it induces an auxiliary tumbler into a position which allows the cylinder core of the lock to be rotated.

REFERENCES:
patent: 828480 (1906-08-01), Ibbott et al.
patent: 1333887 (1920-03-01), Warren
patent: 1382826 (1921-06-01), Dove
patent: 1735868 (1929-11-01), Klingel
patent: 3877267 (1975-04-01), Harris

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