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:
Oct. 13, 2015
Filed:
May. 29, 2012
Hidenari Matsukuma, Tokyo, JP;
Hidenari Matsukuma, Tokyo, JP;
HOCHIKI CORPORATION, Tokyo, JP;
Abstract
To provide a scattered light-type smoke detection apparatus in which internally scattered light in a smoke detection space can be suppressed to improve the S/N ratio. A scattered light-type smoke detection apparatus includes: a smoke detection space that is provided in a light-shielded area that is light-shielded from the outside, into which smoke particles flow from the outside; a light emitter for emitting detection light toward the smoke detection space; and a light receiver for receiving scattered light caused by detection light emitted by the light emitter and scattered by smoke particles flowing into the smoke detection space, wherein the scattered light-type smoke detection apparatus includes an internally scattered light suppressing means for transmitting and guiding part or the whole of detection light emitted by the light emitter and passing through the smoke detection space to a predetermined area or the outside of the light-shielded area to suppress internally scattered light within the light-shielded area.