Flame and smoke detector
January 20, 2018. 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 ReferencesDetection of presence or absence of flames Fire detection system Count discriminating fire detector Optical fire detection system responsive to spectral content and flicker frequency Automatic fire extinguisher with infrared ray responsive type fire detector Light-attenuation type fire detector assembly Combined scatter and light obscuration smoke detector Flame detector using a discrete fourier transform to process amplitude samples from a flame signal Method and apparatus for detecting flame with adjustable optical coupling Self-programming non-invasive motor overload prevention system InventorsAssigneeApplicationNo. 009054 filed on 01/20/1998US Classes:340/577, Flame250/336.1, INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING250/338.1, Infrared responsive250/339.01, With selection of plural discrete wavelengths or bands250/554, Flame light source340/578, By radiant energy340/628, Smoke340/629, Ionization340/630PhotoelectricExaminersPrimary: Wu, David W.Assistant: Pham, Hoa Q. Attorney, Agent or FirmInternational ClassG08B 017/12AbstractA fire and smoke detector utilizes a statistical analysis of the near infrared radiation incident on it. The spectral radiation intensities incident on the fire detector are continuously measured at two near-infrared wavelengths, and a time series of apparent source temperatures is obtained from these measurements. The power spectral density and the probability density function of the apparent source temperatures are sufficient to determine the presence of a fire in the vicinity of the detector. The detector can indicate the presence of a fire in an adjoining room from the radiation which is incident on it due to reflections from common building materials. The present invention relates to fire and/or smoke detection methodology and associated apparatus. The detector utilizes fiber optic as a viewing and absorption/scattering detection means.Field of SearchFlameBy radiant energy Smoke Ionization Photoelectric With additional noninfrared wavelengths Infrared responsive Flame light source INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING With selection of plural discrete wavelengths or bands Including detector array Including Fourier transform infrared spectrometry Sensing flame or explosion Methods Ultraviolet light responsive means | |
