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:
Jun. 19, 2007
Filed:
Apr. 30, 2004
Applicant:
James R. Qualey, Iii, Rindge, NH (US);
Inventor:
James R. Qualey, III, Rindge, NH (US);
Assignee:
SimplexGrinnell LP, Westminster, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 17/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A smoke detector includes a smoke detection chamber containing a white light LED and a light detector. The light detector detects light within at least two distinct optical wavelength bands, and generates respective signals indicative of the intensities of the detected light. An analyzer determines, based on the measured light intensities of the different wavelength bands, whether a dangerous smoke/fire condition is present.