Spark ignition apparatus for internal combustion engines

Claim 1

SPARK IGNITION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING IN COMBINATION A GENERATOR HAVING A STATOR, A ROTOR DRIVEN BY THE ENGINE, AN OUTPUT COIL, AND MEANS ASSOCIATED WITH THE STATOR AND ROTOR FOR GENERATING ACROSS SAID OUTPUT COIL A VOLTAGE WHICH DURING EACH REVOLUTION OF THE ENGINE VARIES FROM A MINIMUM TO A MAXIMUM A NUMBER OF TIMES DEPENDENT ON THE NUMBER OF ENGINE CYLINDERS, A TRIGGER CIRCUIT OPERABLE BY THE VOLTAGE ACROSS SAID OUTPUT COIL TO PRODUCE AN OUTPUT PULSE WHEN THE VOLTAGE ACROSS SAID OUTPUT COIL REACHES A PREDETERMINED VALUE, A CONTROL CIRCUIT OPERABLE BY SAID OUTPUT PULSE FOR SUPPLYING A SPARKING VOLTAGE TO A SPARK PLUG OF THE ENGINE, A SECOND OUTPUT COIL FORMING A PART OF THE GENERATOR, MEANS ASSOCIATED WITH SAID STATOR AND ROTOR FOR GENERATING A VOLTAGE IN SAID SECOND COIL AT AN INSTANT IN EACH VOLTAGE CYCLE BEFORE THE MAXIMUM OUTPUT VOLTAGE IS ATTAINED ACROSS THE FIRST-MENTIONED OUTPUT COIL, THE SECOND OUTPUT COIL BEING ASSOCIATED WITH THE TRIGGER CIRCUIT SO THAT IN EACH VOLTAGE CYCLE THE VOLTAGE GENERATED IN SAID SECOND COIL WILL OPERATE THE TRIGGER CIRCUIT IN THE TRIGGER CIRCUIT HAS NOT PREVIOUSLY BEEN OPERATED BY THE VOLTAGE ACROSS THE FIRST-MENTIONED OUTPUT COIL.