Patent ID: 6222719
Filing Date: 2001-04-24
Classification: F23N,F23Q

Abstract:
Igniter circuit for a furnace gas burner in which an igniter starts a flame in the burner, and in which pulsating current is applied to a coil in order to actuate the furnace; the igniter circuit comprisinga flyback rectifier having a first electrode connected to said relay coil and a second electrode;charge storage means coupled to the second electrode of the flyback rectifier to accumulate a flyback voltage;a step-up transformer having a primary winding and a secondary winding, the secondary winding being connected to the igniter to provide a high voltage thereto; andswitching means coupled between the first charge storage means and the primary winding of the step-up transformer for discharging the accumulated flyback voltage on said charge storage means, including a switching arrangement that automatically discharges said accumulated flyback voltage through said primary winding whenever the flyback voltage reaches a predetermined threshold.