Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include timed pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.

Abstract: An ignition system adapted to generate high frequency and high energy arcs between electrodes effective to initiate combustion of fuels, such as manufactured or natural gas, supplied for heating purposes to residential furnaces, appliances and the like, the ignition system including low voltage control circuitry enabling the use of high voltage breakover devices in high voltage pulse generator circuitry incorporated in the ignition system without requiring the use of high voltage switches for controlling the conduction of the high voltage breakover devices.

Abstract: A primary oil burner safety control and intermittent ignition system for initiating and supervising the combustion of fuel oil in furnaces, the system including thermostatic switch means controlling the energization of a relay having contacts controlling the energization of an oil burner, means constantly monitoring the state of the relay contacts with respect to the state of the thermostatic switch means, and means to effect safety shutdown of the oil burner in the event the state of the relay contacts disagrees with the state of the thermostatic switch means.

Abstract: A solid state ignition system particularly adapted for use in igniting fuel oil, the system including plasma generator means, electronic trigger means and electronic brake means and being effective to produce an improved ionization arc between electrodes for the purpose of initiating fuel oil combustion.

Abstract: A solid state oil burner safety control system with integral ignition and particularly adapted for use with a motor powered oil burner, the system providing intermittent ignition, timed safety shutdown, motor starting capability and automatic restart in the event of combustion failure. The system is also adapted to prevent burner motor starting if the line voltage is below a predetermined value.