Electronic ignition system using multiple thyristors

Claim 1

IN AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING A SOURCE OF ELECTRICAL ENERGY AND A COIL WITH A PRIMARY WINDING AND A SECONDARY WINDING, MEANS FOR INDUCING AN IGNITION VOLTAGE AT THE COIL SECONDARY WINDING COMPRISING A FIRST THYRISTOR IN SERIES WITH THE COIL PRIMARY WINDING, A SECONDARY THYRISTOR HAVING ITS CATHODE COUPLED TO THE CATHODE OF SAID FIRST THYRISTOR, A CAPACITOR COUPLING THE ANODES OF SAID FIRST AND SECOND THYRISTORS, A TOW-STAGE TRIGGER MEANS ACTUATABLE BY ROTATING PARTS OF SAID ENGINE, SAID TRIGGER MEANS TURNING ON SAID FIRST THYRISTOR WHEN IN ONE OF THE STAGES, TRANSFORMER MEANS FOR CHARGING SAID CAPACITOR WHEN SAID FIRST THYRISTOR IS ON, AND CIRCUITRY FOR TURNING SAID SECOND THYRISTOR ON WHEN SAID TRIGGER MEANS SWITCHES TO ITS OTHER STAGE, SAID SECOND THYRISTOR DISCHARGING SAID CAPACITOR THROUGH SAID THYRISTOR TO TURN SAID FIRST THYRISTOR OFF RAPIDLY.