Locks – Operating mechanism – Combination
Patent
1989-03-17
1990-03-27
Wolfe, Robert L.
Locks
Operating mechanism
Combination
70303A, 70322, E05B 3700
Patent
active
049109812
ABSTRACT:
An automatically self locking and self scrambling combination lock is disclosed wherein a spring biased bolt is moveable by its bias toward a locking position and a detent is provided on an end of the fence arm associated with a fence lever connected to the bolt whereby on movement of the bolt towards its locking position, the detent engages the edge of a single one of the tumbler wheel gates to scramble that tumbler wheel alignment relative the other tumbler wheels as the fence arm leaves the tumbler wheel gates. Additional spring means are provided in the form of a multiple armed spring member having a first spring arm which urges the fence lever toward the tumbler wheels when the spring member is deflected under the action of an actuator roller once on each rotation of an associated lock shaft, a second spring arm which normally urges the fence lever away from the tumbler wheels when the spring member is not deflected and a third spring arm which normally biases the spring member toward its non-deflected position of rest. In addition, an eccentric roller rim associated with the actuator roller for deflecting the spring member is provided so that the timing of such defective movement of the spring member in response to rotation of the lock shaft varies from rotation to rotation in response to incremental movements of the eccentric rim about its mounting post as it goes through successive engagements with the spring member.
REFERENCES:
patent: 1845021 (1932-02-01), Hope
patent: 3481167 (1969-12-01), Barner
patent: 4142388 (1979-03-01), Phillips
patent: 4541259 (1985-09-01), Oyeda
patent: 4756176 (1988-07-01), Oyeda
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