Stabilization circuit for arc lamps

Claim 1

AN AUTOMATICALLY REGULATED BALLAST CIRCUIT COMPRISING ALTERNATING CURRENT INPUT MEANS CONNECTABLE TO A CURRENT SUPPLY, A BALLAST CONNECTED IN SERIES IN THE INPUT MEANS, A PAIR OF SATURABLE REACTORS HAVING POWER WINDINGS, THE BALLAST INCLUDING THE POWER WINDINGS, MEANS FOR DIRECTING ONE HALF-WAVE OF THE SUPPLY CURRENT THROUGH THE POWER WINDINGS OF ONE REACTOR, MEANS FOR DIRECTING THE OTHER HALF-WAVE OF THE SUPPLY CURRENT THROUGH THE POWER WINDINGS OF THE OTHER REACTOR; EACH REACTOR HAVING A CORE AND FIRST AND SECOND CONTROL WINDINGS; MEANS FOR SUPPLYING A FIRST, STABILIZED DIRECT CURRENT SIGNAL TO THE FIRST CONTROL WINDING OF EACH REACTOR FOR MAGNETICALLY BIASING BOTH CORES EQUALLY AND BEYOND THE SATURATION DEGREE REQUIRED FOR OPTIMUM CURRENT SUPPLY CONDITIONS; MEANS FOR DERIVING, FROM THE ALTERNATING CURRENT SUPPLY, A SECOND DIRECT CURRENT SIGNAL WHICH IS A FUNCTION OF THE SUPPLY VOLTAGE; AND MEANS FOR SUPPLYING SAID SECOND SIGNAL TO THE SECOND CONTROL WINDING OF EACH REACTOR FOR OPPOSING, EQUALLY IN EACH CORE, THE SATURATION PRODUCED BY THE FIRST STABILIZED DIRECT CURRENT SIGNAL IN THE FIRST CONTROL WINDING WITH THE SECOND SIGNAL.