Door exit fixture with pneumatic means for maintaining a latch b

Details Door exit fixture with pneumatic means for maintaining a latch b Door exit fixture with pneumatic means for maintaining a latch b

1974-07-29

1976-03-23

Wolfe, Robert L.

Closure fasteners

Bolts

Emergency operating means

292144, E05C 1502

Patent

active

039456706

ABSTRACT:
An exit fixture for a door is connected with the lock on the door and includes manually operated means which when depressed retracts the bolt of the lock, thereby releasing the door. Springs act upon the manually operated means to restore the manually operated means to its original position wherein the bolt will again project from the door. A bellows or other pneumatic device when filled with pressurized air overcomes the force exerted by the springs so as to allow the manually operated means to assume the position in which the latch bolt is retracted, thus permitting the door to be opened and closed without operating the lock.

REFERENCES:
patent: 2571379 (1951-10-01), Parsons
patent: 3481076 (1969-12-01), Bedard
patent: 3677043 (1972-07-01), Cox
patent: 3722938 (1973-03-01), Bauer
patent: 3767238 (1973-10-01), Zawadzk
patent: 3801144 (1975-04-01), Diehl

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