Opening-devices for smoke- and heat-vents

Details Opening-devices for smoke- and heat-vents Opening-devices for smoke- and heat-vents

1976-07-16

1978-05-23

Camby, John J.

49 1, 49 7, 49 8, 98 42R, F23L 1702

Patent

active

040904377

ABSTRACT:
Compact and autonomous device of high power for the opening of a smoke and heat vent, placed between the fix and the opening frame of the vent and composed of a fix arm forming the fix frame and a pivoting arm, the opening force being transmitted to the opening frame by means of a hinge fixed on a fitting piece gliding in the pivoting arm, which is retained in a closed position by means of a pivoting hook, driven by different pulling means, among which a pivoting lever kept in a retaining position by an electro-magnet, all forces and tensions being entirely taken up within the autonomous device and working in vertical and parallel planes, which are very close to one another. (Figure 1)

REFERENCES:
patent: 3182581 (1965-05-01), Poederoyen et al.
patent: 3337991 (1967-08-01), Adams
patent: 3516198 (1970-06-01), Lyons
patent: 3601437 (1971-08-01), Lyons
patent: 3738253 (1973-06-01), Jentoft
patent: 3877173 (1975-04-01), Lyons

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