Stronghold combination lock

Details Stronghold combination lock Stronghold combination lock

1976-10-22

1977-12-20

Frazier, Roy D.

Locks

Special application

For closures

70309, 292175, 292335, E05B 6506, E05B 6320, E05B 3704

Patent

active

040634361

ABSTRACT:
A combination lock with a combination dial having a shaft extending through an elliptically shaped door aperture, through a wheel post, and through an elliptically shaped aperture in a lock stand to mount a cam and a plurality of locking wheels each having a slot which when properly positioned permits sliding movement of the dial, post wheels and a locking bolt mounted on the post to a release position in response to manually applied lateral force as the aligned slots move into an upstanding fence on the stand. A spring connected to the stand extends about the post to urge the post in the opposite direction toward a latch position. A detent member is pivotably mounted on the door with an upstanding portion engaging a cut-out portion of the bolt to latch the bolt in the release position and a cam portion which engages a rail on the door jamb when the door is shut to pivot the detent member against the urging of a spring to disengage the upstanding portion and permit the bolt, dial, wheels and post to return to the latch position.

REFERENCES:
patent: 244783 (1881-07-01), Arnold
patent: 316285 (1885-04-01), McKeen
patent: 601975 (1898-04-01), Morris
patent: 1107736 (1914-08-01), Wilkinson et al.
patent: 1662449 (1928-03-01), Zubow
patent: 2597056 (1952-05-01), Beder
patent: 2797271 (1957-06-01), Augustine
patent: 2881612 (1959-04-01), Smith et al.
patent: 3063282 (1962-11-01), Aytes

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