Permutation controlled padlock

Details Permutation controlled padlock Permutation controlled padlock

1978-02-24

1979-10-16

Wolfe, Robert L.

Locks

Portable

Padlocks

70 25, 70314, E05B 3710

Patent

active

041708849

ABSTRACT:
Permutation and key-operated padlock having a driver tumbler formed integrally with its tumbler post. The tumbler post extends through the top face of the padlock casing and is retained to the dial knob for dialing the tumblers by a spinning operation to form an integral dial knob and tumbler post assembly which cannot be removed from the casing by unauthorized efforts to release the shackle. The permutation mechanism includes the driver tumbler and driven tumblers freely rotatable on the tumbler post and biased into engagement with each other. A spindle for the driven tumblers extends within the tumbler post and the driver and driven tumblers have the usual axially extending driver lugs to rotate said tumblers upon movement of the driver tumblers to the correct combination numbers and align radially extending slots in the tumblers to receive a tongue from a rocker carrying a latch bolt and accommodate release movement of said rocker and release of the latch bolt from the shackle. The shackle has a one-piece upsetter on its longer leg having one arm upsetting the innermost driven tumbler upon outward movement of the shackle and misaligning the tumbler slots. The upsetter has a second upsetter arm engaging an upsetter lug on the driven tumbler to move the last number of the combination on the dial out of registry with the combination marker on the lock casing. A spring extends across the padlock casing and engages the casing at one end and the rocker at its opposite end to move the rocker tongue out of the tumbler slots when aligned and accommodate release of the shackle.

REFERENCES:
patent: 1369850 (1921-03-01), Steen
patent: 2441895 (1948-05-01), Miller
patent: 3563067 (1971-02-01), Foote
patent: 4055972 (1977-11-01), Calegan

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