Voltage control system for heating loads

Claim 1

IN COMBINATION, AN ELECTRICAL HEAT DISSIPATING LOAD, AN ALTERNATING CURRENT ENERGY SUPPLY ELECTRICALLY CONNECTED TO SUPPLY ENERGY TO SAID LOAD, A VOLTAGE RESPONSIVE SEMICONDUCTOR CONTROL MEANS HAVING ELECTRODES CONNECTED IN SERIES WITH SAID LOAD FOR CONTROLLING THE SUPPLY OF ENERGY FROM SAID SUPPLY TO SAID LOAD, PREPONDERANTLY INDUCTIVE CIRCUIT MEANS FOR REPEATEDLY APPLYING TO SAID CONTROL MEANS A VOLTAGE PEAK SUBSTANTIALLY AT THE TIME IN THE APPLICATION OF THE ALTERNATING VOLTAGE SINE WAVE TO SAID CONTROL MEANS WHEN THE VOLTAGE PASSES THROUGH ZERO COMPRISING A FIRST TRANSFORMER HAVING INPUT TERMINAL MEANS CONNECTED TO SAID ENERGY SUPPLY AND OUTPUT TERMINAL MEANS, A SECOND TRANSFORMER HAVING INPUT AND OUTPUT TERMINAL MEANS, MEANS COMPRISING FIRST CONDUCTOR MEANS AND A CURRENT CONTROL MEANS AND A RECTIFIER CONNECTING THE OUTPUT TERMINAL MEANS OF SAID FIRST TRANSFORMER WITH THE INPUT TERMINAL MEANS OF SAID SECOND TRANSFORMER, AND SECOND CONDUCTOR MEANS CONNECTING THE OUTPUT TERMINAL MEANS OF SAID SECOND TRANSFORMER WITH TWO ELECTRODES OF SAID SEMICONDUCTOR CONTROL MEANS FOR CONTROLLING THE ENERGY SUPPLY TO SAID LOAD IN SUBSTANTIALLY COMPLETE HALF CYCLES IN RESPONSE TO SAID CURRENT CONTROL MEANS.