Forward scatter smoke detector

Details Forward scatter smoke detector Forward scatter smoke detector

1984-11-19

1986-04-01

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

250574, 356439, G08B 1710

Patent

active

RE0321052

ABSTRACT:
An optical smoke detector having a conical masking body located directly between a light source and a light receiver. The masking body is provided with a reflecting surface so that rays from the light source are diverted into a reaction zone to supplement direct rays from the light source to the zone. In one embodiment the reflecting surface is cuspidate while in another embodiment a second masking body is added which shadows the light receiver from viewing the base of the first masking body.

REFERENCES:
patent: 3185975 (1965-05-01), Kompelien
patent: 3409885 (1968-11-01), Hall
patent: 3710365 (1973-01-01), Barnes
patent: 3787703 (1974-01-01), Topol
patent: 4111564 (1978-09-01), Trice, Jr.
patent: 4181439 (1980-01-01), Tresch et al.
patent: 4230950 (1980-10-01), Forss et al.
patent: 4241282 (1980-12-01), Tresch et al.
patent: 4269510 (1981-05-01), Horvath et al.

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