Voltage stabilizing equipment for use with a fluctuating a. c. voltage

Claim 1

AN ALTERNATING VOLTAGE STABILIZING CIRCUIT ARRANGEMENT COMPRISING, IN COMBINATION, INPUT MEANS HAVING A FIRST AND SECOND INPUT TERMINAL FOR APPLYING A VARIABLE ALTERNATING INPUT VOLTAGE; A LINEAR INDUCTANCE COIL CONNECTED AT ONE END THEREOF TO SAID FIRST INPUT TERMINAL AND HAVING A TAP AT A PREDETERMINED INTERMEDIATE POINT OF THE LENGTH OF SAID INDUCTANCE COIL, SAID TAP CONSTITUTING ONE OUTPUT TERMINAL FOR DELIVERING A STABILIZED ALTERNATING OUTPUT VOLTAGE; A TANK CIRCUIT CONNECTED BETWEEN SAID SECOND INPUT TERMINALS AND THE OTHER END OF SAID LINEAR INDUCTANCE COIL, THAT END OF SAID TANK CIRCUIT WHICH IS CONNECTED TO SAID SECOND INPUT TERMINAL CONSTITUTING A SECOND OUTPUT TERMINAL FOR DELIVERING SAID STABILIZED ALTERNATING OUTPUT VOLTAGE, SAID TANK CIRCUIT COMPRISING VARIABLE INDUCTANCE MEANS INCLUDING AT LEAST TWO BRANCHES EACH COMPRISING INDUCTOR MEANS OF THE SELF-SATURATING TYPE AND A RECTIFIER IN SERIES THEREWITH, SAID TWO BRANCHES BEING CONNECTED IN PARALLEL WITH EACH OTHER, THE RECTIFIER IN ONE OF SAID BRANCHES BEING ARRANGED WITH ITS CURRENT-PASSING DIRECTION IN OPPOSITION TO THAT OF THE RECTIFIER IN THE OTHER BRANCH, AND CAPACITIVE CIRCUIT MEANS CONNECTED IN PARALLEL WITH AT LEAST A PART OF SAID VARIABLE INDUCTANCE MEANS.