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. 20, 2007
Filed:
Mar. 22, 2006
Takatoshi Yamagishi, Tokyo, JP;
Kazuhisa Nakano, Tokyo, JP;
Hidesato Morita, Tokyo, JP;
Nohmi Bosai Ltd., Tokyo, JP;
Abstract
A flame detector having the following features is capable of simple and reliable determination of the occurrence or nonoccurrence of fire resulting from a flame based on waveforms detected from detection signals from infrared sensors. The flame detector includes an infrared sensor for detecting an infrared ray, a RAM serving as a waveform storing unit for storing a plurality of waveforms detected from an output signal from the infrared sensor, and a CPU serving as a wavelength determining unit for determining succession of waveforms when at least a first predetermined number of waveforms stored in the RAM are produced for a first predetermined time and at least a second predetermined number of waveforms different from the first predetermined number of waveforms are produced for a second predetermined time different from the first predetermined time.