Duct smoke detector

Details Duct smoke detector Duct smoke detector

1986-07-28

1988-07-19

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specified housing

116273, G08B 2300

Patent

active

047588276

ABSTRACT:
Apparatus for sensing smoke in a duct includes a housing with inlet and outlet ports and a flow chamber which directs gas flow on a path between the ports and to and from a smoke detector. A vaned rotor on the path is visible through a window in the housing gives a visual indication of the existence or nonexistence and direction of gas flow and thus whether or not normally flowing duct gas is being sensed.

REFERENCES:
patent: 3922525 (1975-11-01), Kozak et al.
patent: 4164866 (1979-08-01), Mitchell et al.
patent: 4172381 (1979-10-01), Aiguer
patent: 4565090 (1986-01-01), Gotanda

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