Safety apparatus for room heating device
Safety apparatus in gas heating device
Safety circuit for monitoring a flickering flame
Safety device for fan heater
Safety device of the friction ratchet type operable on extinctio
Safety equipment for gas burner
Safety pilot burners
Safety valve supply circuit for the ignition of a gas burner
Self-powered flame monitoring apparatus
Self-powered gas appliance
Self-powered intermittent ignition and control system for gas co
Shutoff system for gas fired appliances
Stationary flame scanner for tilting burner
System for redundantly processing a flame amplifier output signa