F - Mech Eng,Light,Heat,Weapons – 23 – N
Patent
F - Mech Eng,Light,Heat,Weapons
23
N
341/19
F23N 5/00 (2006.01) F23Q 7/22 (2006.01)
Patent
CA 1207407
AUTOMATIC IGNITION AND FLAME DETECTION SYSTEM FOR GAS FIRED DEVICES ABSTRACT OF THE DISCLOSURE Improved automatic ignition system (10) for gas fired devices such as boilers, clothes dryers, ranges and the like. The system (10) is of the type including a variable resistance ignition means (16) having a particular temperature characteristic disposed in proximity to the burner (14) for igniting gas flowing therethrough when the ignition means (16) is energized. The improved system includes detection means (12) for repeatedly measuring the resistance of the ignition means (16) and for comparing such measurements, and activating means (12) for activating the gas valve opening means (56) to open the valve (60) when the detection means (12) establishes that the ignition means (16) is in the portion of its temperature characteristic where the temperature thereof is sufficient to ignite gas. The preferred system (10) also includes means (12) for detecting a flameout, means (22) for detecting a low gas pressure condition, and visual means (28) for indicating system status as well as the existence and nature of system malfunctions.
434423
Peters Kenneth R.
Romanelli Pat
Meredith & Finlayson
Ram Products Inc.
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