Single commutation means for single phase or multi-phase inverters

Claim 1

A GENERATOR OF CURRENT OF AN ADJUSTABLE POLARITY COMPRISING A PAIR OF INPUT TERMINALS CONNECTED TO A SOURCE OF D.C. POTENTIAL A SINGLE PAIR OF INPUT CONDUCTORS EACH CONNECTED TO A RESPECTIVE INPUT TERMINAL, SAID CONDUCTORS CONSISTING OF A POSITIVE INPUT CONDUCTOR AND A NEGATIVE INPUT CONDUCTOR, AT LEAST ONE LINE BREAKER UNIT CONNECTED ACROSS SAID INPUT CONDUCTORS AND HAVING TWO BRANCHES, EACH BRANCH INCLUDING A SOLID STATE THYRATRON CONNECTED IN SERIES WITH A DIODE TO A COMMON JUNCTION POINT, THE SOLID STATE THYRATRON OF EACH BRANCH BEING CONNECTED IN NORMAL POLARITY, AND THE ASSOCIATED DIODE IN REVERSE POLARITY WITH RESPECT TO THE POLARITY OF SAID INPUT CONDUCTOR, ONE THYRATRON OF EACH UNIT BEING CONNECTED, ON THE ONE HAND, TO THE POSITIVE INPUT CONDUCTOR AND, ON THE OTHER HAND, THROUGH ITS ASSOCIATED DIODE TO THE NEGATIVE INPUT CONDUCTOR, THE OTHER THYRATRON OF EACH UNIT BEING CONNECTED, ON THE ONE HAND, TO THE NEGATIVE INPUT CONDUCTOR AND, ON THE OTHER HAND, THROUGH ITS ASSOCIATED DIODE TO THE POSITIVE INPUT CONDUCTOR, THE COMMON JUNCTURE POINTS OF THE BRANCHES OF EACH UNIT BEING INTERCONNECTED WITH EACH OTHER AND WITH A RESPECTIVE OUTPUT TERMINAL OF THE GENERATOR, AN OSCILLATING CIRCUIT INSERTED SHUNTWISE ACROSS SAID INPUT CONDUCTORS WITH REFERENCE TO AT LEAST ONE UNIT AND INCLUDING A CONDENSER, AND A SHUNT CIRCUIT FOR SAID CONDENSER INCLUDING AN INDUCTION COIL AND A CONTACT-MAKER IN SERIES, THE CLOSING OF THE CONTACT-MAKER PRODUCING AN A.C. DISCHARGE OF THE CONDENSER TO APPLY AN OSCILLATING POTENTIAL BETWEEN SAID CONDUCTORS AND ACROSS SAID THYRATRONS AND SAID DIODES TO TRANSIENTLY REVERSE THE CURRENT FLOW THROUGH SAID THYRATRONS RELATIVE TO THAT SUPPLIED BY THE D.C. SOURCE THEREBY TO EXTINGUISH ANY IGNITED THYRATRON.