Apparatus for automatically calibrating and testing smoke detect

Details Apparatus for automatically calibrating and testing smoke detect Apparatus for automatically calibrating and testing smoke detect

1976-10-27

1978-06-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356207, G01N 2126

Patent

active

040938670

ABSTRACT:
Apparatus for automatically calibrating smoke detectors within desired ranges of values of smoke obscuration, and thereafter retesting them for valid calibration; in accomplishing this the smoke obscuration is continuously increased at a predetermined uniform rate.

REFERENCES:
patent: 3702734 (1972-11-01), Lindahl et al.
patent: 4009376 (1977-02-01), Faraguet

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