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:
Nov. 19, 2013
Filed:
Feb. 16, 2009
Markus Loepfe, Feldmellen, CH;
Kurt Müller, Männedorf, CH;
Georges A. Tenchio, Ebmatingen, CH;
Walter Vollenweider, Steinhausen, CH;
Markus Loepfe, Feldmellen, CH;
Kurt Müller, Männedorf, CH;
Georges A. Tenchio, Ebmatingen, CH;
Walter Vollenweider, Steinhausen, CH;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A smoke alarm has a base element with a flat mounting surface, a light emitter that is attached to the mounting surface and that is configured to issue an illuminating light, and a light receiver that is attached to the mounting surface next to the light emitter and that is configured to receive a measurement light that results from a back-scattering of the illumination light at a measurement object located in a detection space. A data processing device is coupled to an output of the light receiver and configured to evaluate temporal changes of an output signal issued by the light receiver. Also, there is provided a method for checking the functional capability of the smoke alarm.