Fail-safe energizing circuit for a functional device
Flame detection system using a voltage clipper means
Flame failure device
Fluid control system
Fuel burner having an intermittent pilot with pre-ignition testi
Fuel burner safe starting system
Fuel control unit for a gas furnace and method of making the sam
Fuel control unit for a gas furnace and method of making the sam
Fuel gas supply and ignition system with single valve
Fuel ignition control system
Fuel ignition control system
Fuel ignition system control arrangement providing total fuel sh
Fuel ignition system having contact interlock protection
Fuel ignition system including an igniter providing a lingering
Fuel ignition system providing fuel shutoff under simultaneous f
Fuel valve control system