Movable or removable closures – With means mounting closure for swinging – With latch or lock
Patent
1974-12-18
1976-11-02
Nunberg, Casmir A.
Movable or removable closures
With means mounting closure for swinging
With latch or lock
292201, 292227, E05B 6505, E05C 310
Patent
active
039888592
ABSTRACT:
A door is provided with an air-operated lock including a base structure mounted on the door adjacent the free vertical edge thereof, a bolt pivoted on the base structure for movement between retracted and extended positions, and an air cylinder between the base structure and the bolt for moving the bolt to its extended position. The air line from the lock passes from the door to the frame through a hinge capable of transmitting pressurized air.
REFERENCES:
patent: 518119 (1894-04-01), Schnepf
patent: 2093201 (1937-09-01), Love
patent: 2212563 (1940-08-01), Groeger
patent: 2726893 (1955-12-01), Zucker
patent: 3377092 (1968-04-01), Rohman
patent: 3722938 (1973-03-01), Bauer et al.
patent: 3872541 (1975-03-01), Peterson
C. Hager & Sons Hinge Manufacturing Company
Dorner Kenneth J.
Nunberg Casmir A.
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