Air control system

Details Air control system Air control system

1986-10-17

1989-09-19

Tanner, Harry B.

Automatic temperature and humidity regulation

Ventilator type

Responsive to fire or smoke

236 44R, 236 493, 237 80, 98 1, F24F 700

Patent

active

048673765

ABSTRACT:
An air control device, having a panel which opens and closes in response to changes in environmental conditions in a building, preferably is sized to replace a ceiling tile in a conventional drop ceiling. The air control device may be responsive, for example, to a change in temperature of the air space above a conventional drop ceiling, raising the panel when the temperature drops to near freezing, allowing air from below the drop ceiling to commingle with air above the drop ceiling. A support in rolling contact with the underside of the panel maintains the panel open, the support including a fusible fire link which fails or fractures in the event of a fire, thus allowing the panel to fall, insuring that the fire rating of the ceiling is not compromised.

REFERENCES:
patent: 2372164 (1945-03-01), Woodhams
patent: 3202079 (1965-08-01), Steiner
patent: 3230859 (1966-01-01), O'Hea
patent: 3643582 (1972-02-01), Mochida
patent: 3913344 (1975-10-01), Holloway et al.
patent: 3923096 (1975-12-01), Van der Lely
patent: 4090437 (1978-05-01), Bogaert
patent: 4520959 (1985-06-01), Kolt
patent: 4559867 (1985-12-01), Van Becelaere et al.
patent: 4625626 (1986-12-01), Aalto et al.

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