Locks – Operating mechanism – Combination
Patent
1977-04-12
1979-01-30
Holko, Thomas J.
Locks
Operating mechanism
Combination
206 15, 273113, 273153R, E05B 3720
Patent
active
041365429
ABSTRACT:
There is disclosed a lock mechanism requiring movement through an enabling combination of preselected, sequential positions for operation. The lock mechanism is preferably embodied in a locking box and includes a latch formed with a pair of opposed hooks that capture a retainer of the box cover. The opposed hooks are carried on separate members yieldably interconnected. Release of the lock requires positioning a ball in an actuation cavity to block movement of one of the members, thereby permitting the hooks to be separated, releasing the retainer pin carried by the box cover. The ball is positioned in the actuation cavity by advance through a torturous passageway of a three-dimensional labyrinth within the box. Passageway defining partitions of the labyrinth have apertures at preselected locations to provide the desired, preselected sequential combination of positions. The partitions are removeable, reversible and/or interchangeable to permit changing of the combination and can have bypass apertures to further increase the complexity of the enabling combination of positions.
REFERENCES:
patent: 403012 (1889-05-01), Washburn
patent: 558066 (1896-04-01), Happersett
patent: 612572 (1898-10-01), Robertson
patent: 753355 (1904-03-01), Bruck
patent: 1714019 (1929-05-01), Gornicec
patent: 1733772 (1929-10-01), Battersheu
patent: 3234767 (1966-02-01), Allander
patent: 3406971 (1968-10-01), Koff
patent: 3540731 (1970-11-01), Moncey
patent: 3785651 (1974-01-01), Smith
patent: 3787054 (1974-01-01), Stafford
Prof. A.M. Low "Wizard's Boxes" Popular Science, Mar. 1953, pp. 188-191.
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