Closure fasteners – Bolts – Multiple
Patent
1976-05-27
1977-09-06
Foss, J. Franklin
Closure fasteners
Bolts
Multiple
292 66, E05C 112
Patent
active
040464105
ABSTRACT:
A security door assembly adapted for securing a single or double door in locking engagement with an adjacent door jamb structure. In the interior of a hollow door is located a locking assembly which includes a rotatably mounted plate member and a plurality of elongate locking members. The locking members have their proximal end portions connected to the plate member with respective distal end portions of the locking members being positioned for protruding through respective peripheral edges of the door. An operating level located on one face of the door is connected to the plate member to permit rotating the same inside the door. When the plate member is rotated, the respective locking members are moved longitudinally to protrude from the respective peripheral edges of the door and engage the adjoining door jamb structure and floor to lockingly secure the door in place.
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patent: 2823536 (1958-02-01), Watson
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patent: 3751949 (1973-08-01), Castle
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