Smoke detector

Details Smoke detector Smoke detector

1981-04-27

1983-05-24

Swisher, S. Clement

Measuring and testing

Instrument casing

250384, G01D 1124

Patent

active

043844880

ABSTRACT:
A smoke detector containing at least one smoke measuring chamber which possesses a mounting or socket plate having an upper surface intended to be mounted at the ceiling of a room or other appropriate area to be monitored and a housing enclosing the smoke measuring chamber and suspendingly secured at the socket plate. The housing possesses openings for the entry of the ambient air into the smoke measuring chamber. The smoke detector comprises a manually adjustable device by means of which it is possible to change the air entry openings in a manner such that the smoke detector can be accommodated to different environmental or ambient conditions, especially those containing different quantities of dust and other contaminants.

REFERENCES:
patent: 3495521 (1970-02-01), Foster
patent: 3903419 (1975-09-01), Lehsten
patent: 3908957 (1975-09-01), Schutt
patent: 4220862 (1980-09-01), Byrne
Bulletin Des Schweizerischen Elektrotechnischen Vereins, Band 43 No. 23, Nov. 1952 Meili: "Ionisations-Feuermelder" pp. 933-939.
Electronique Industrielle No. 79 Dec. 1964 Henry: "La detection dlectronique des incendies" pp. 437-441.

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