Combination lock with anti-pick feature

Details Combination lock with anti-pick feature Combination lock with anti-pick feature

1982-02-16

1984-04-24

Wolfe, Robert L.

Locks

Portable

Padlocks

70312, 70333R, E05B 3706, E05B 6300

Patent

active

044440294

ABSTRACT:
A combination padlock has dial-driven rotary sleeves mounted within the lock casing on a longer leg of the padlock shackle. The sleeves have peripheral teeth with at least one tooth being omitted on each sleeve to define a bypass gap. To open the lock, the dials must be rotated so as to turn each of the bypass gaps into alignment with a respective blocking projection in the lock casing. To thwart any attempt to pick the lock, alternate teeth on each sleeve are shorter than the adjacent teeth whereby a detent-type feel may be produced when the sleeve is rotated, simulating the feel produced when the bypass gap is brought into line with the respective blocking projection.

REFERENCES:
patent: 3720082 (1973-03-01), Feinberg et al.
patent: 3732711 (1973-05-01), Albert
patent: 3879968 (1975-04-01), Schweizer

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