Closure fasteners – Bolts – Sliding
Patent
1980-05-12
1983-07-26
Zugel, Francis K.
Closure fasteners
Bolts
Sliding
29216921, E05B 902
Patent
active
043950639
ABSTRACT:
A self-interlocking dead bolt assembly for the door on a safe depository or like security container has a dead bolt guide mounted on the inner face of the door and a bore extends end to end through the dead bolt guide to permit an elongated dead bolt of high strength steel to be slidably mounted in said bore and movable to extend beyond said dead bolt guide for engagement with a strike or keeper to lock the door when it is in the closed position, and the bore has a locking groove inwardly of this end of the bore. The dead bolt has an inner bore or chamber which defines an annular wall thereon having a spaced plurality of sized transverse passages therethrough at a predetermined medial position. A corresponding plurality of sized ball members mounted in the transverse passages are actuated by a suitable actuating assembly in said inner bore to move radially outward on movement of the dead bolt to the locked position when the transverse passages are brought into alignment with the locking groove to self interlock the dead bolt in this locked position. The actuating assembly must be moved in a direction to cause the ball members to be released from the locking groove before the dead bolt can slide from the locked to the unlocked position. The actuating assembly desirably includes a breakaway device to insure against unauthorized tampering with the dead bolt assembly or door of the safe depository or like security container.
Further, the combination of the above described self interlocking dead bolt assembly with an operatively associated operating lever or live bolt forming part of a suitable operating mechanism such as a combination lock affixed to and extending through from the inner face to the exterior face of the door for direct drive movement of the actuating assembly of the self interlocking dead bolt assembly.
REFERENCES:
patent: 1748599 (1930-02-01), Dermody
patent: 3696744 (1972-10-01), Etchell
patent: 3748880 (1973-07-01), Atkins
patent: 3792887 (1974-02-01), Ramsey
patent: 3877261 (1975-04-01), Robins
patent: 4183585 (1980-01-01), Allemann
Aschenbrenner Peter A.
Bobis Daniel H.
Zugel Francis K.
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