BREAKERLESS IGNITION SYSTEM

Conventional breaker points in an engine ignition system are replaced by switching means comprising a transistor device and a biasing coil that is coupled with a core and cooperates with a magnet assembly rotating in timed relation to the engine cycle. The magnet assembly has poles with substantial extension in the orbital direction, spaced a small distance apart. The core has one pole face with substantial extension in the orbital direction and another spaced therefrom by a small distance in said direction and substantially narrower. As applied to a flywheel magneto system, the biasing coil is wound on a straight core element mounted adjacent to the armature core leg first approached by the magnet assembly, at the departure side of that core leg.