System for the increase of the number of differing locking possi

Details System for the increase of the number of differing locking possi System for the increase of the number of differing locking possi

1980-07-21

1982-04-20

Wolfe, Robert L.

Locks

Operating mechanism

Key

70364A, 70378, 70409, E05B 2704

Patent

active

043252419

ABSTRACT:
In rotary cylinder locks with spring-loaded, two-piece tumbler pins which are disposed radially to the lock cylinder and which interact with recesses 9, 10, 11 arranged in the side surfaces of flat keys 4, some of the recesses 10, 11 are disposed in steps. In this manner, one recess (for instance 10) shows differing control surfaces 10a, 10b, 10c, which can interact with differently disposed inner pins. By omitting some control surfaces (for instance 10a), auxiliary or single keys can be created, which can only position part of all inner pins of the same group. In this manner the number of differing locking possibilities of such locks can be multiplied.

REFERENCES:
patent: 1644365 (1927-10-01), Bennett
patent: 3393542 (1960-07-01), Crepinsek
patent: 3738136 (1973-06-01), Falk
patent: 3797520 (1973-12-01), Crepinsek

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