Allen M Robison

US Patent:

41365429, Jan 30, 1979

Filed:

Apr 12, 1977

Appl. No.:

5/786759

Inventors:

Allen M. Robison - Long Beach CA

International Classification:

E05B 3720

US Classification:

70290

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.