Adjustable voltage transformer

Claim 1

A VOLTAGE TRANSFORMER COMPRISING: (A) A MAGNETIC CORE HAVING THREE SUBSTANTIALLY PARALLEL LEGS, RESPECTIVELY, A FIRST LEG, A SECOND MIDDLE LEG AND A THIRD LEG, (B) MEANS CONNECTING EACH OF SAID THREE LEGS TOGETHER AT A FIRST END PORTION OF SAID LEGS, (C) THE SECOND END PORTION OF SAID LEGS BEING SEPARATE FROM EACH OTHER, THERE BEING A FIRST DIMENSION SPANNING SAID FIRST AND SECOND LEGS AND A SECOND DIMENSION SPANNING SAID FIRST AND THIRD LEGS, (D) A MAGNETIC SHUNT MOVABLE ACROSS SAID SECOND END PORTION, (E) SAID SHUNT HAVING A LENGTH GREATER THAN SAID FIRST DIMENSION AND LESS THAN SAID SECOND DIMENSION, SAID SHUNT BEING ADJUSTABLY MOVABLE FROM A FIRST POSITION SPANNING SAID SECOND LEG AND SUBSTANTIALLY ALL OF SAID FIRST LEG THROUGH A SECOND POSITION SPANNING ALL OF SAID SECOND LEG AND PARTS OF BOTH OF SAID FIRST POSITION TO THIRD LEGS TO A THIRD POSITION SPANNING SAID SECOND LEG AND SUBSTANTIALLY ALL OF SAID THIRD LEG AND BACK THROUGH SAID SECOND POSITION TO SAID FIRST POSITION TO VARY THE RELUCTANCE OF THE MAGNETIC PATH BETWEEN SAID FIRST AND SECOND LEGS, (F) A PRIMARY WINDING ON SAID SECOND MIDDLE LEG, (G) A SECONDARY WINDING ON SAID SECOND MIDDLE LEG, (H) SAID SECONDRY WINDING ON THE MIDDLE LEG PROVIDING SUBSTANTIALLY THE MINIMUM RATED VOLTAGE OF SAID TRANSFORMER, (I) A SECONDARY WINDING ON THE FIRST LEG IN SERIES ADDITION WITH THE SECONDARY WINDING ON SAID SECOND LEG, THE SECONDARY WINDING ON SAID FIRST LEG PROVIDING SUBSTANTIALLY ONE-HALF THE VOLTAGE OF THE SECONDARY WINDING ON THE SECOND LEG, (J) SCREW THREAD MEANS FOR MOVING SAID MAGNETIC SHUNT ON THE SECOND END PORTION OF SAID THREE LEGS, AND (K) LOCK MEANS FOR LOCKING SAID MAGNETIC SHUNT IN A PREDETERMINED POSITION.