Automatic voltage control for electrical precipitators

Claim 1

IN COMBINATION WITH AN ELECTRICAL PRECIPITATOR HAVING TWO ELECTRODES CONNECTED TO AN A.C. POWER SUPPLY VIA- A TRANSFORMER AND A RECTIFIER, AND AUTOMATIC VOLTAGE CONTROL SYSTEM COMPRISING, IN COMBINATION: FIRST LIMIT SENSOR MEANS FOR PICKING UP EXCESS CURRENT CONSUMED BY THE PRECIPITATOR DUE TO THE NUMBER OF INTENSITY OF TRANSIENT FLASHOVERS OCCURRING DURING A GIVEN UNIT TIME; SECOND LIMIT SENSOR MEANS FOR PICKING UP THE INCREASED VOLTAGE DROP DUE TO ARCOVERS; EACH OF SAID SENSOR MEANS INCORPORATING AN OSCILLATOR HAVING TWO COUPLED INDUCTION COILS WHICH ARE PHYSICALLY SPACED APART TO FORM AN AIR GAP BETWEEN THEMSELVES, A DECOUPLING SHIELD, AND MEANS FOR MOVING SAID SHIELD INTO SAID AIR GAP BETWEEN SAID COILS FOR DECOUPLING THE SAME FROM EACH OTHER WHEN THE RESPECTIVE LIMIT SENSOR PICKS UP A VALUE CORRESPONSING TO THE LIMIT TO WHICH IT IS SET, THEREBY TO INTERRUPT THE OSCILLATIONS OF SAID OSCILLATOR; TWO VARIABLE CONDENSERS;