Closure fasteners – Bolts – Multiple
Patent
1983-11-10
1986-11-18
Moore, Richard E.
Closure fasteners
Bolts
Multiple
70143, E05C 116
Patent
active
046231757
ABSTRACT:
A combined door latch and deadbolt is arranged to fit within the normal latch bolt openings provided in a pre-cut door. The solid combined longlatch and deadbolt is arranged to protrude at least one inch out from the door and into a striker plate which has a long angled depressor element against which the longlatch bears when the door is being swung closed. The longlatch is mounted in a cylinder which extends not only through the normal hole from the edge of the door, but also most of the way through the larger transverse hole provided in a pre-cut door, which is aligned with the usual position of the door handle. This relatively long cylinder provides the desired additional guidance for the longlatch with its increased travel as compared with conventional door latches. Aligned with the handle and the keyhole and tumbler mechanism is a rotatable member having a lever arm, and a latch pulling member is pivotally mounted to the lever arm to withdraw the latch from the striker plate when the handle or the key is operated. The longlatch pulling member is free to move in a direction perpendicular to the axis of movement of the longlatch in addition to axial movement so that it may follow the extended throw of the lever arm required for the one inch retraction of the longlatch and compress the biasing springs with full mechanical efficiency. A deadlocking plunger member is also provided, and special camming arrangements serve to operate a deadlocking catch to prevent forced movement of the longlatch when the deadlocking plunger is in engagement with the face of the striker plate.
REFERENCES:
patent: 188308 (1877-03-01), Sherman
patent: 663503 (1900-12-01), Laureyns
patent: 1199645 (1916-09-01), Wicks
patent: 2370690 (1945-03-01), Schlage
patent: 3159994 (1964-12-01), Schulz
patent: 3322451 (1967-05-01), Bredemus
patent: 3471188 (1969-10-01), Hawkins
patent: 3912309 (1975-10-01), Fischer et al.
patent: 4037865 (1977-07-01), Hook
patent: 4422677 (1983-12-01), Gater
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