Alternating current voltage regulator utilizing electromagnetic switch means, an autotransformer and voltage sensing means

Claim 1

AN ALTERNATING CURRENT VOLTAGE REGULATING SYSTEM COMPRISING: FIRST AND SECOND INPUT TERMINALS FOR CONNECTION TO AN ALTERNATING CURRENT VOLTAGE SOURCE HAVING A VARIABLE POTENTIAL; A FIRST OUTPUT TERMINAL CONNECTED TO SAID FIRST INPUT TERMINAL; A SECOND OUTPUT TERMINAL; A VOLTAGE CHANGING TRANSFORMER HAVING A WINDING, FIRST AND SECOND WINDING TERMINALS DEFINING THE ENDS OF A FIRST SECTION OF SAID WINDING, AND A THIRD WINDING TERMINAL DEFINING ONE END OF A SECOND SECTION OF SAID WINDING EXTENDS FROM SAID FIRST WINDING TERMINAL; SAID FIRST WINDING SECTION HAVING A GREATER NUMBER OF TURNS THAN DOES SAID SECOND WINDING SECTION; A FIRST ELECTROMAGNETIC CONTACTOR HAVING A FIRST OPERATING COIL, A NORMALLY CLOSED FIRST SWITCH, A NORMALLY CLOSED SECOND SWITCH, AND A NORMALLY OPEN THIRD SWITCH, A SECOND ELECTROMAGNETIC CONTACTOR HAVING A SECOND OPERATING OIL, A NORMALLY OPEN FOURTH SWITCH, A NORMALLY OPEN FIFTH SWITCH AND A NORMALLY CLOSED SIXTH SWITCH; A VOLTAGE SENSING CIRCUIT CONNECTED TO SAID INPUT TERMINALS AND RESPONSIVE TO THE POTENTIAL APPLIED TO SAID INPUT TERMNALS, SAID VOLTAGE SENSING CIRCUIT INCLUDING A FIRST CONTROL MEANS CONNECTED TO SAID FIRST OPERATING COIL OF SAID FIRST CONTACTOR TO ENERGIZE THE SAME WHEN THE POTENTIAL APPLIED TO SAID INPUT TERMINALS EXCEEDS A PREDETERMINED LOW VALUE, SAID VOLTAGE SENSING CIRCUIT INCLUDING A SECOND CONTROL MEANS CONNECTED TO SAID SECOND OPERATING COIL OF SAID SECOND CONTACTOR TO ENERGIZE THE SAME WHEN THE POTENTIAL APPLIED TO SAID INPUT TERMINALS EXCEEDS A PREDETERMINED HIGH VALUE GREATER THAN SAID PREDETERMINED LOW VALUE; FIRST CIRCUIT MEANS INCLUDING SAID FIRST SWITCH CONNECTING SAID THIRD WINDING TERMINAL OF SAID TRANSFORMER TO SAID SECOND INPUT TERMINAL AND SECOND CIRCUIT MEANS INCLUDING SAID SECOND SWITCH CONNECTING SAID SECOND WINDING TERMINAL OF SAID TRANSFOMER TO SAID SECOND OUTPUT TERMINAL SO THAT SAID TRANSFORMER IS CONNECTED IN A STEP-UP MODE BETWEEN SAID INPUT AND OUTPUT TERMINALS WHEN SAID INPUT POTENTIAL IS BELOW SAID PREDETERMINED LOW VALUE;