Voltage generator for electrolytic erosion processes

Claim 1

VOLTAGE GENERATOR FOR ELECTROLYTIC EROSION PROCESS COMPRISING RECTIFIER MEANS INCLUDING CONTROLLED SEMICONDUCTOR RECTIFIER COMPONENTS, CONTROL CIRCUIT MEANS IN CIRCUIT WITH SAID SEMICONDUCTOR RECTIFIER COMPONENTS FOR CONTROLLING RECTIFICATION OF AT LEAST ONE PHASE ALTERNATING CURRENT, SAID CONTROL CIRCUIT MEANS INCLUDING DELAY MEANS FOR DELAYING THE IGNITION POINT OF SAID SEMICONDUCTOR RECTIFIER COMPONENTS, SAID RECTIFIED DIRECT CURRENT BEING ADAPTED TO BE APPLIED ACROSS A GAP DEFINED BY A WORKPICE ELECTRODE AND TOOL ELECTRODE, AN INTEGRATING NETWORK ELECTRICALLY COUPLED WITH SAID GAP TO PRODUCE A SIGNAL INDICATIVE FOR THE OCCURRENCE OF AN ARC OR SPARK DISCHARGE BETWEEN THESE ELECTRODES, SAID INTEGRATING NETWORK BEING ELECTRICALLY CONNECTED TO SAID CONTROL CIRCUIT SUCH THAT THE IGNITION OF THE SEMICONDUCTOR COMPONENTS IS DELAYED UPON OCCURRENCE OF ARC OR SPARK DISCHARGES, TO THEREBY REDUCE THE DIRECT CURRENT VOLTAGE APPEARING AT THE GAP.