Combination lock with self-canceling mechanism

Details Combination lock with self-canceling mechanism Combination lock with self-canceling mechanism

E - Fixed Constructions

05

B

70/27

E05B 43/00 (2006.01)

Patent

CA 1304950

COMBINATION LOCK WITH SELF-CANCELING MECHANISM ABSTRACT A combination door lock having a self-canceling combination mechanism which is secured inside the lock housing and is provided with spring-biased hook engaging fingers which engage one or more of the combination discs when these discs are aligned at a predetermined position where a retracting cam engages a bolt-retracting lever. Once the bolt is retracted by the lever these hook fingers engage with an associated combination disc and move it out of its predetermined position to a random position thereby scrambling or self-canceling the combination or the place- ment of the discs. Accordingly, it is not possible to predict the precise position of the combination discs after the bolt has been retracted and the door opened.

560336

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