Capacitor discharge ignition system

Claim 1

AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE COMPRISING, AN IGNITION COIL HAVING A PRIMARY WINDING AND A SECONDARY WINDING, SAID SECONDARY WINDING BEING ADAPTED TO BE CONNECTED WITH A SPARK PLUG OF SAID INTERNAL COMBUSTION ENGINE, A SOURCE OF DIRECT CURRENT, AN INDUCTOR, A FIRST SWITCHING MEANS OPERATIVE TO PERIODICALLY CONNECT AND DISCONNECT SAID SOURCE OF DIRECT CURRENT AND SAID INDUCTOR, A CAPACITOR, A CHARGING CIRCUIT CONNECTING SAID CAPACITOR AND SAID INDUCTOR, THE ENERGY DEVELOPED IN SAID INDUCTOR WHEN SAID SWITCHING MEANS IS OPENED BEING TRANSFERRED TO SAID CAPACITOR THROUGH SAID CHARGING CIRCUIT, A SECOND SWITCHING DEVICE HAVING CURRENT CARRYING TERMINALS AND A CONTROL TERMINAL, THE CURRENT CARRYING TERMINALS OF SAID SECOND SWITCHING DEVICE BEING CONNECTED IN SERIES WITH SAID CAPACITOR AND WITH THE PRIMARY WINDING OF SAID IGNITION COIL WHEREBY SAID CAPACITOR DISCHARGES THROUGH SAID SECOND SWITCHING DEVICE AND THROUGH THE PRIMARY WINDING OF SAID IGNITION COIL WHEN SAID SECOND SWITCHING DEVICE IS BIASED TO A CONDUCTIVE CONDITION, AND A CONTROL CIRCUIT COUPLING SAID CHARGING CIRCUIT WITH SAID CONTROL TERMINAL OF SAID SECOND SWITCHING DEVICE, SAID CONTROL CIRCUIT RESPONSIVE TO THE DIRECTION OF CURRENT FLOW IN SAID CHARGING CIRCUIT AND OPERATIVE TO SUPPLY A TURN ON CURRENT TO SAID SECOND SWITCHING DEVICE AT THE INSTANT THAT SAID CAPACITOR IS COMPLETELY CHARGED BY SAID INDUCTOR.