Transistorized ignition system using plural primary windings

Claim 1

AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE COMPRISING: AN INDUCTION COIL INCLUDING A HIGH VOLTAGE SECONDARY WINDING CONNECTED TO A DISTRIBUTOR AND A FIRST AND SECOND PRIMARY WINDING, ALL OF SAID WINDINGS WOUND ON A FERROMAGNETIC CORE; A FIRST AND SECOND TRANSISTOR EACH HAVING A BASE, AN EMITTER, AND A COLLECTOR; A CHARGING CIRCUIT INCLUDING A SOURCE OF DIRECT CURRENT WITH ITS POSITIVE TERMINAL CONNECTED TO THE EMITTER OF THE FIRST TRANSISTOR, SAID FIRST PRIMARY WINDING CONNECTED BETWEEN THE COLLECTOR OF THE FIRST TRANSISTOR AND THE EMITTER OF THE SECOND TRANSISTOR, AND SAID SECOND PRIMARY WINDING CONNECTED BETWEEN THE COLLECTOR OF THE SECOND TRANSISTOR AND THE NEGATIVE TERMINAL OF THE SOURCE OF CURRENT; AND A BIASING CIRCUIT FOR CONTROLLING DIRECT CURRENT PULSES THROUGH SAID PRIMARY WINDINGS INCLUDING A PAIR OF CONTACTS OPERATED BY THE DISTRIBUTOR, AID CONTACTS CONNECTED BETWEEN THE NEGATIVE TERMINAL OF THE SOURCE AND THE BASE OF SAID SECOND TRANSISTOR, SAID BIASING CIRCUIT ALSO INCLUDING CIRCUIT CONNECTIONS BETWEEN BOTH BASES AND BOTH EMITTERS FOR CUTTING OFF THE CURRENT THROUGH THE PRIMARY WINDINGS WHEN THE CONTACTS ARE OPEN.