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:
Apr. 29, 2008
Filed:
Jun. 13, 2003
Kurt Hess, Wolfhausen, CH;
Urs Riedi, Jona, CH;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
The smoke detector contains an optical measuring chamber, having a sensor arrangement () with at least one light source (') and one light receiver (), and a labyrinth system () with screens () arranged on the periphery of the measuring chamber. The light source (′) and the light receiver () are each arranged in a housing (). The above-mentioned housings () have an elongated shape and a small window opening The at least one light source (′) and light receiver (′) are arranged in the rear part of their housings (), so that between the window openings of the housings () and the light-penetrated optical surfaces of the at least one light source (′) and/or the lens of the light receiver () a relatively large gap is formed. This gap is preferably greater than the diameter of the above-mentioned optical surfaces, or of the above-mentioned lens. In the measuring chamber between the light exit and entry side of the housings () and the screens () opposite them, a compact, open scattering space is formed.