73166863
Apr 18, 1978
May 15, 1979
A FLAME SCANNER AND COMBUSTION SAFETY CONTROL DESIGNED TO MONITOR GASEOUS AND/OR LIQUID FUEL FLAMES IN SEMI-AUTOMAAICALLY CONTROLLED BOILERS AND FURNACES AND TO DE-ENERGIZE AUTOMATIC FUEL SHUT-OFF VALVES UPON LOSS OF FLAME DETECTION SIGNAL
Electrical and Scientific Apparatus