Smoke detector sensitivity testing apparatus

Details Smoke detector sensitivity testing apparatus Smoke detector sensitivity testing apparatus

1996-02-23

1997-09-23

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

340630, 340515, 73 1R, 22240213, 252305, G08B 1710

Patent

active

056709463

ABSTRACT:
Apparatus for testing the sensitivity of a smoke detector (12) in-situ, including a head assembly (1) comprising a housing (14) for surrounding a smoke detector in-situ and forming part of a sensing loop (14, 15, 16, 17)through which air carrying an aerosol will circulate, a sensor (25, 26, 27) for sensing the concentration of aerosol in the air circulating in the loop, a fan (20) for causing air to circulate in the loop, an aerosol container (24) for supplying aerosol to the loop and a control unit 2 for controlling the concentration of aerosol in the air circulating in the loop by controlling the fan (20) and the aerosol container (24) in response to the output of the sensor.

REFERENCES:
patent: 3693401 (1972-09-01), Purt et al.
patent: 4093867 (1978-06-01), Shah et al.
patent: 4271693 (1981-06-01), Bute
patent: 4301674 (1981-11-01), Haines et al.
patent: 4462244 (1984-07-01), Lee
patent: 4827244 (1989-05-01), Bellavia et al.
patent: 5170148 (1992-12-01), Duggan et al.
patent: 5309148 (1994-05-01), Birk

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