Security locks

Details Security locks Security locks

1989-09-27

1990-11-13

Wolfe, Robert L.

Locks

Special application

For closures

70465, 70DIG49, 292229, E05B 6510

Patent

active

049693433

ABSTRACT:
A lock mechanism for an emergency exit door or the like is constructed with a tongue pivotable between two positions--an extended position and a retracted position, the former for use when the door is closed and locked, and the latter when the door is open--and a pawl arranged for releasably retaining the tongue in either or both of the two positions, the tongue being releasable from the pawl by depressing a breakable seal or by a cylinder key. The mechanism has the advantage of being readily releasable from the inside yet capable of being sealed against unauthorized use.

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