Spark erosion with non-distorted impulses

Claim 1

A CIRCUIT FOR SPARK EROSION HAVING MEANS FOR CONTROLLING AT LEAST THE FREQUENCY OF THE IMPULSES CONVEYED TO THE EROSION GAP BY THE CIRCUIT AND COMPRISING; A SUBSTANTIALLY STORAGE FREE WORKING CIRCUIT INCLUDING AN EROSION GAP, A WORKING CONTROL SUCH SWITCH IN SAID WORKING CIRCUIT ADAPTED TO BE CONTROLLED BY AN IMPULSE GENERATOR, A QUENCHING CIRCUIT INCLUDING A CONDENSER FOR STORING ENERGY FOR QUENCHING THE WORKING SWITCH, A QUENCHING SWITCH IN SAID QUENCHING CIRCUIT ALSO ADAPTED TO BE CONTROLLED BY AN IMPULSE GENERATOR, MEANS FOR CHARGING SAID CONDENSER THROUGH SAID QUENCHING SWITCH, MEANS FOR REVERSING THE CHARGE ON SAID CONDENSER, MEANS FOR APPLYING THE REVERSED CHARGE ON SAID CONDENSER VIA SAID QUENCHING SWITCH TO SAID WORKING CIRCUIT FOR QUENCHING SAID WORKING SWITCH, AND MEANS FOR RECHARGING SAID CONDENSER VIA SAID QUENCHING SWITCH IMMEDIATELY FOLLOWING THE QUENCHING OF SAID WORKING SWITCH, SAID MEANS FOR REVERSING THE CHARGE ON SAID CONDENSER COMPRISING AN AUXILIARY CHARGE REVERSING CIRCUIT CONNECTED IN PARALLEL WITH SAID CONDENSER AND INCLUDING AN INDUCTANCE, AND A RECTIFIER IN SERIES, SAID QUENCHING CIRCUIT COMPRISING SAID CONDENSER, SAID QUENCHING SWITCH, SAID EROSION GAP AND SAID WORKING CONTROL SWITCH IN SERIES.