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. 05, 2021
Filed:
Jan. 19, 2018
Applicant:
Siemens Schweiz Ag, Zürich, CH;
Inventors:
Aleksandar Duric, Zug, CH;
Hilmar Konrad, Baar, CH;
Assignee:
SIEMENS SCHWEIZ AG, Zurich, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 17/10 (2006.01); G08B 17/107 (2006.01); H05B 45/10 (2020.01); G01N 15/06 (2006.01); H01L 33/50 (2010.01); H01L 33/48 (2010.01);
U.S. Cl.
CPC ...
G08B 17/107 (2013.01); G01N 15/06 (2013.01); H01L 33/505 (2013.01); H05B 45/10 (2020.01); G01N 2015/0693 (2013.01); H01L 33/486 (2013.01);
Abstract
An optical smoke detector using a two-color principle is provided. The smoke detector may include a light emitting diode (LED), and a photosensor spectrally coordinated with the LED. The LED includes an LED chip configured to emit light in a first wavelength range, and a light converter configured to convert part of the emitted light from the LED chip into light in a second wavelength range, wherein the second wavelength range has a spectral half-width having a maximum of 150 nm.