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:
Feb. 25, 2020
Filed:
Feb. 12, 2016
Siemens Schweiz Ag, Zurich, CH;
Walter Vollenweider, Steinhausen, CH;
SIEMENS SCHWEIZ AG, Zurich, CH;
Abstract
The present disclosure relates to fire detectors. For example, a fire detector may include: a housing with a smoke inlet; a detection unit for specific fire parameters; an analyzing unit for generating a fire alarm; a light transmitter; and a light receiver connected to the analyzing unit for monitoring the smoke inlet for impermissible pollution. The light transmitter and the light receiver comprise a scattered light arrangement with a scattered light volume near the smoke inlet and susceptible to pollution. A part of a light bundle traverses the region without striking adjacent housing parts, or a part of the light strikes a housing part and the housing part deflects the second part of the light bundle away from the light receiver or absorbs it. The analyzing unit sends a service message if the scattered light detected by the light receiver exceeds a threshold value.