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:
Jan. 14, 2014
Filed:
May. 09, 2008
Thomas Goulet, Unterägeri, CH;
Peter Stahl, Zürich, CH;
Thomas Goulet, Unterägeri, CH;
Peter Stahl, Zürich, CH;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method, a fire alarm, and a fire alarm system enable detection and localization of a fire in monitored rooms, having two detector units for detecting a fire parameter, wherein an evaluation unit connected to both detector units is used for evaluation. According to the invention, the air in the monitored rooms is fed to the first detector unit via a first pipe conduit and to the second detector unit via a second pipe conduit. Both pipe conduits are arranged in each monitored room and provided with suction intakes. The air is supplied to both detectors by means of at least one suction unit, and the air speed in each pipe conduit is different. If at least one threshold value is detected, a time difference between the detection of the threshold value at the first detector unit and the detection of the same threshold value at the second detector unit is determined by the evaluation unit and, using the determined time difference, the location of the fire is determined according to the air speed in the first pipe conduit and the second pipe conduits.