Locks – Operating mechanism – Combination
Patent
1989-08-21
1990-06-26
Gall, Lloyd A.
Locks
Operating mechanism
Combination
70315, E05B 3716
Patent
active
049368940
ABSTRACT:
A lock includes a plurality of elongated buttons, each of which has on the sides thereof a plurality of gates spaced angularly and longitudinally from one another. A case contains the lock and defines a plurality of bores within which the buttons travel. The buttons are urged out a front cover of the case by biasing springs and are normally prevented from rotation by engagement with keying protrusions on the case. The lock includes a locking bolt which is coupled to a checker plate. The checker plate defines a plurality of edges that engage the sides of the buttons and are received in the gates therein only if the buttons are properly positioned.
REFERENCES:
patent: 656157 (1900-08-01), Alm
patent: 1085894 (1914-02-01), Eagle
patent: 1343459 (1920-06-01), Lacy
patent: 1374769 (1921-04-01), Schicke
patent: 1534836 (1925-04-01), Brede et al.
patent: 3099150 (1963-07-01), Check
patent: 3115028 (1963-12-01), Windle
patent: 3357216 (1967-12-01), Cook
patent: 3397046 (1976-02-01), Wang
patent: 4626007 (1986-12-01), Larson
patent: 4748833 (1988-06-01), Nagasawa
Larson Wayne F.
Risko John J.
Gall Lloyd A.
Supra Products, Inc.
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