Fire detection method and apparatus using overlapping spectral bands
May 7, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3824391 3859520 Detection of presence or absence of flames Discriminating fire sensor Flame sensing system Two channel optical flame detector Optical flame and explosion detection system and method Flame detector Dual spectrum infrared fire sensor Fire and explosion detection InventorsAssigneeApplicationNo. 852086 filed on 05/07/1997US Classes:340/578, By radiant energy250/339.15Sensing flame or explosionExaminersPrimary: Hofsass, JefferyAssistant: Huang, Sihong Attorney, Agent or FirmForeign Patent References
International ClassG08B 017/12AbstractAn optical fire detector employs two or more sensors operating a different spectral bands. The spectral bands are selected to have approximately coincident cut-off wavelengths in order to make the detector's ability to positively identify a fire more uniform over its field of view. The use of three overlapping spectral bands provides the detector with enhanced detection capabilities for large, hot fires that behave like black body radiators. | |
