Current supply apparatus

Claim 1

CURRENT SUPPLY APPARATUS COMPRISING A CORE OF MAGNETIC MATERIAL HAVING A FIRST, A SECOND AND A THIRD LEG, THE MAGNETIC MATERIAL FORMING SAID SECOND LEG HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP, A FIRST WINDING ON SAID FIRST LEG FOR SETTING UP IN SAID FIRST LEG AN ALTERNATING MAGNETOMOTIVE FORCE WHEN CURRENT FROM A SOURCE OF ALTERNATING CURRENT IS SUPPLIED TO SAID FIRST WINDING, THE ALTERNATING FLUX IN SAID SECOND LEG RESULTING FROM SAID ALTERNATING MAGNETOMOTIVE FORCE SATURATING SAID SECOND LEG DURING A PORTION OF EACH HALF CYCLE PERIOD OF SAID ALTERNATING FLUX, FLUX FLOWING IN SAID THIRD LEG DURING SAID PORTION OF EACH HALF CYCLE PERIOD WHEN SAID SECOND LEG IS SATURATED, A SECOND WINDING ON SAID SECOND LEG, A THIRD WINDING ON SAID THIRD LEG, AND MEANS RESPONSIVE TO CURRENT INDUCED IN SAID SECOND WINDING DURING THE PORTION OF EACH HALF CYCLE PERIOD WHEN SAID SECOND LEG IS UNSATURATED FOR COMPLETING AN ALTERNATING-CURRENT CIRCUIT INCLUDING SAID THIRD WINDING, THE RESULTING ALTERNATING CURRENT FLOWING IN SAID THIRD WINDING SETTING UP IN SAID THIRD LEG AN ALTERNATING MAGNETOMOTIVE FORCE WHICH OPPOSES CHANGES OF FLUX IN SAID THIRD LEG.