Closure fasteners – Extension link – Slotted bar
Patent
1979-02-06
1980-10-07
Moore, Richard E.
Closure fasteners
Extension link
Slotted bar
E05C 1716
Patent
active
042264537
ABSTRACT:
A pivoting arm door lock mechanism is disclosed which allows the user to lock the door in a fully closed position or a partially opened position merely by positioning a single arm. The mechanism also permits the user to open the door to an intermediate position without locking it in that position. The mechanism consists of a slidable T-bolt attached to the door which slides along a generally horizontal axis. A slotted arm, being pivotable in a generally vertical plane, is attached to the door jamb such that the head of the T-bolt engages the slot in the pivoting arm. In order for the T-bolt head to pass through the pivoting arm, the arm must be in a vertical orientation. When in this position, the door is locked in a fully closed position since the longitudinal axis of the T-bolt passes through the pivoting axis of the arm. In order to open the door to either a first or second partially opened positions, the arm is rotated to a horizontal position which allows the T-bolt to slide along its slot. The bolt may not be withdrawn when the arm is in its horizontal position since the height of the T-head is wider than the width of the slot. A locking mechanism on the pivoting arm enables the user to lock the door in its second partially opened position.
REFERENCES:
patent: 197577 (1877-11-01), Whipple
patent: 251732 (1882-01-01), Phillips
patent: 388074 (1888-08-01), Reardon et al.
patent: 416874 (1889-12-01), Trabold
patent: 622556 (1899-04-01), Speirs
patent: 1038752 (1912-09-01), Hofbauer
patent: 1722736 (1929-07-01), Derbyshire
patent: 2102729 (1937-12-01), McDonald
patent: 3458226 (1969-07-01), Carlston
patent: 4062578 (1977-12-01), Chen
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