Pin-tumbler-type lock having antipick security action

Details Pin-tumbler-type lock having antipick security action Pin-tumbler-type lock having antipick security action

1979-06-04

1981-08-11

Wolfe, Robert L.

Locks

Operating mechanism

Key

70419, E05B 6300

Patent

active

042827310

ABSTRACT:
In a removable core-type lock, the internal tumbler pin mechanism is modified to incorporate an antipick jamming action that is actuated whenever an attempt is made to pick the tumbler pins. The jamming action comprises a pair of security tumbler pin assemblies that cooperate with the lock's cylindrical plug which incorporates the lock's keyway and serves as the primary locking element, and with a modified control sleeve structure which forms part of the jamming action and serves as a control means for releasably retaining the core in the lock's casing. In reaction to tampering of the lock by an attempt to pick the tumbler pins, one of the security pins is forced to a position that locks the control sleeve structure and plug together in a manner that prevents the opening of the lock or the removal of the core from the lock casing by means other than the use of a properly notched primary or control key.

REFERENCES:
patent: 1953535 (1934-04-01), Hurd
patent: 3349588 (1967-10-01), Hines

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