Locks – Operating mechanism – Key
Patent
1994-12-30
1998-12-08
Gall, Lloyd A.
Locks
Operating mechanism
Key
70409, 70419, 70420, 70453, E05B 2710
Patent
active
058455256
ABSTRACT:
A cylinder lock and key combination, wherein the lock comprises a side profile ridge (60) disposed in the key slot (53) and having a relatively shallow recess (61), in which a projection (55) on a side tumbler (54) is vertically movable, and a continuously extending edge portion (62). The key has a relatively shallow coded groove (17), which cooperates with the side tumbler projections (55) of the lock, and a rectilinear, deeper profile groove (16), into which the edge portion (62) of the side profile ridge fits. This unitary edge portion secures a good guidance of the key when the latter is inserted into the lock.
REFERENCES:
patent: 1244450 (1917-10-01), Christoph
patent: 2023207 (1935-12-01), Olson
patent: 3412588 (1968-11-01), Schwegler
patent: 4116025 (1978-09-01), Wolter
patent: 4356713 (1982-11-01), Widen
patent: 4516416 (1985-05-01), Prunbauer et al.
patent: 4964288 (1990-10-01), Braun et al.
patent: 5421179 (1995-06-01), Bergstrom
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