The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2005
Filed:
Dec. 31, 2002
Hidenari Matsukuma, Kanagawa-ken, JP;
Manabu Dohi, Kanagawa-ken, JP;
Hiroshi Honma, Tokyo, JP;
Hiroshi Shima, Kanagawa-ken, JP;
Hidenari Matsukuma, Kanagawa-ken, JP;
Manabu Dohi, Kanagawa-ken, JP;
Hiroshi Honma, Tokyo, JP;
Hiroshi Shima, Kanagawa-ken, JP;
Hochiki Corporation, , JP;
Abstract
A light scattering type smoke sensor comprising a holder with openings embedded with light emitting part and light detecting part respectively, which do not protrude into the smoke detection chamber. The optical axis of light emitting part intersects at a predetermined first angle α in the horizontal direction with the optical axis of the light detecting part at a predetermined second angle β in the vertical direction. The optical axis of the light emitting part and optical axis of the light detecting part further comprise a configuration angle δ in the range of 90˜120 degrees used as the supplementary angle for the scattering angle θ. Accordingly, the smoke detection part is further constituted in a thin-shaped light scattering smoke sensor which enables the setup of a scattering angle with no directivity in the smoke influx to the smoke detection chamber.