Closure fasteners – Bolts – Swinging
Patent
1976-04-05
1977-11-01
Wolfe, Robert L.
Closure fasteners
Bolts
Swinging
292117, 292198, 292216, 292DIG49, 292127, 292227, E05C 316
Patent
active
040562760
ABSTRACT:
A door lock device suitable for operation with electrically operated means, which in turn can be actuated by magnetic card, special turn key, or a key punch combination for security purposes. If desired the lock device may be operated with a suitable mechanical or key lock mechanism. The door lock comprises a pivoting latch dog or bolt which is triggered to a locked position upon closing of a door. The pivoting dog or bolt is controlled by a toggle linkage which can be positioned near, on, or over-center to hold the door positively locked against external pressure. Means are provided for releasing the toggle linkage, even under loads against the door, by force directly applied to the toggle linkage between the end pivots of the linkage, and in addition springs are provided for moving the latch dog to an open position positively once the toggle linkage has been released. As the linkage is released the latch bolt moves the door to an ajar position.
REFERENCES:
patent: 1184498 (1916-05-01), Wells
patent: 1937978 (1933-12-01), Miller
patent: 2325225 (1943-07-01), Burke
patent: 2767007 (1956-10-01), Burke
patent: 2833578 (1958-05-01), Burke
patent: 3065986 (1962-11-01), Barker
LandOfFree
Door lock does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Door lock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door lock will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4812