Safety lock mechanism

Details Safety lock mechanism Safety lock mechanism

1975-12-09

1977-09-20

Moore, Richard E.

Closure fasteners

Bolts

Swinging

2922515, E05C 1916

Patent

active

040493024

ABSTRACT:
In a safety lock mechanism, including a locking bolt pivotable about a door hinge so as to be able to swing to a door-locking position and an electromagnet provided to retain said bolt in said door-locking position, apparatus arranged, so that upon the interruption of current supplied to said electromagnet and the application of a force on the door leaf to open the door, said bolt is urged to pivot to a door-releasing position, thus ensuring that the door is openable under all circumstances, even when considerable pressure is exerted thereon, such as e.g. from crowds of people in a panic.

REFERENCES:
patent: 1344508 (1920-06-01), Hagstrom
patent: 2673755 (1954-03-01), Asp
patent: 2871676 (1959-02-01), Miller et al.
patent: 3129968 (1964-04-01), Graham

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