Room ventilating device

Valves and valve actuation – Rotary valves – Ball valve

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Details

49 31, 251134, 181224, F24F 700

Patent

active

042573190

ABSTRACT:
Ventilating device for rooms having air passage apertures and closure means movable by an electric drive between an open position and a closed position, a noxious gas sensor and electrical control means responsive to the gas sensor for operating the electric drive so that the closure means is moved to the open position when the gas sensor senses noxious gas concentration in the room above a predetermined level.

REFERENCES:
patent: 2566784 (1951-09-01), Waff
patent: 3011718 (1961-12-01), Joerren et al.
patent: 3282557 (1966-11-01), Capps

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