Closure fasteners – Extension link – Slotted bar
Patent
1975-12-05
1976-10-19
Moore, Richard E.
Closure fasteners
Extension link
Slotted bar
292259R, 70 93, E05C 1704
Patent
active
039867412
ABSTRACT:
Apparatus is described which is mountable on a door and across a doorway for securing the door in closed condition as well as in partially open condition. The apparatus includes a keeper which is adapted to be mounted on a door jamb along one side of the doorway opening. The keeper has a pair of plates one of which is securely fastened to the door jamb and is also pivotally connected to the other plate. The plates are releasably engaged with each other in closed condition. Only when disengaged, the pivotally mounted plate may swing laterally away from the doorway to open position. A bar structure extending across the doorway is pivotally connected to the door jamb on the opposite side of the opening from the keeper, as by being mounted on the same hinge which connects the door to the jamb, so as to swing with the door. The end of the bar opposite to the keeper includes a latch having a bolt which is movable into and out of a slot in the pivotally mounted plate of the keeper. The head of the bolt is larger in width than the width of the slot so that the bolt can not be removed when the keeper is in open condition. When the keeper is in closed position, the bolt may be inserted into the slot in the closed keeper so as to secure the door against any opening. If however limited entry is desired, the keeper may be released so as to permit the pivotal plate to swing into its open position while the bolt limits the extent to which the door may be opened; it being necessary to completely close the door, swing the arm of the keeper back to closed position and withdraw the bolt before the door can be completely opened. A high degree of security is provided both by the keeper structure which forms a box structure of rigid, strong material and also by the bar structure affording the latch which extends across the entire doorway from door jamb to door jamb and also must be advertently operated in order to permit any opening of the door.
REFERENCES:
patent: 741673 (1903-10-01), Kalb et al.
patent: 2407900 (1946-09-01), Paul
patent: 3458226 (1969-07-01), Carlston
patent: 3806179 (1974-04-01), Roessle
Lukacher Martin
Moore Richard E.
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