专利名称：Flame detection system
发明人：Stuart M. Oliver,Ralph A. Proud, Jr.,Sanford J.
Parsons
申请号：US05/484283申请日：19740628公开号：US03967255A公开日：19760629
摘要：A flame detection system comprising two light responsive photovoltaicphotocell sensors in combination with corresponding light filters, a photovoltaic sensingamplifier, a control amplifier, and a power source. The photocell/filter combinations areresponsive to spectral energy in two different regions of the spectrum, said regionsbeing such that illumination from a hydrocarbon flame causes a reversal in voltagepolarity of the signal from the pair of photovoltaic photocells. The photovoltaic
photocells are serially connected in voltage opposition and the voltage produced by thecombination is applied as an input coupled to the sensing amplifier. The latter is arrangedand configured to respond to a selected voltage polarity generated by the photovoltaiccombination, when illuminated by a hydrocarbon flame, by providing a control signal tothe control amplifier. The control amplifier is typically coupled to a relay and/or solenoidvalve which controls the turn-on of a fire alarm and/or extinguishing means. Wheneverthe control amplifier receives a control signal (indicative of the presence of a
hydrocarbon flame), it activates the relay and/or solenoid valve and, thereby, causes thealarm and/or extinguishing means to turn on.
申请人：THE DELPHIAN FOUNDATION
代理人：Norman Zafman,Theodore Scott Park
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