Auto-directing lever lock

Locks – Operating mechanism – Key

Patent

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Details

70353, 70365, 70419, 70423, 70455, E05B 2500

Patent

active

047396393

ABSTRACT:
An auto-directing lever lock includes a case housing a cylinder (4) with a plug (3) mounted for movement therein. The plug includes a keyway (14) for accepting a key bit (7). A keyway opening (15) on the surface of the plug provides access for lever tumblers (6) to engage lever steps on the key bit. The key bit is detachable from a bow and shank section (8), and inserted in to the keyway through a key hole (39) in the case. The tumblers ride on a surface of the plug and are held away from the lever steps of the key bit during rotation of the plug, until the tumblers disengage the plug surface due to the keyway opening therein. The tumblers, when disengaged from the plug surface, fall onto the lever steps of the key bit to align gatings (32) of the tumblers so a bolt stump (28) may pass therethrough to retract a bolt (5) of the lock.

REFERENCES:
patent: 8071 (1851-05-01), Yale
patent: 17139 (1857-04-01), Diss
patent: 17681 (1857-06-01), Johnson
patent: 173932 (1876-02-01), Foehner
patent: 199023 (1878-01-01), Border
patent: 303498 (1884-08-01), Demming
patent: 306976 (1884-10-01), Thumshirn
patent: 615206 (1898-11-01), Babcock
patent: 913923 (1909-03-01), Solomon
patent: 1702430 (1929-02-01), Fremon
patent: 1904882 (1933-04-01), Prior, Jr.
patent: 2179947 (1939-11-01), Miller
patent: 2528964 (1950-11-01), Lurtz
patent: 2696727 (1954-12-01), Schlabach
patent: 4599877 (1986-07-01), Rabinow

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