Abstract: A method of winding coils in one and the same wire size, so that they can be tailored to prevailing circuit requirements, includes, for example, when a lower resistance is required, a partial winding is first wound in one direction from a first connection to a second connection, the wire then being wound from the second connection in the opposite direction for joining to the first connection.

Abstract: Apparatus in magneto ignition systems for providing time separated sequences for charging and triggering in cophased charging and triggering voltage sequences, including inhibition of the ignition sequence in such apparatus. The ignition system includes a triac as a control member, a rectifier being included in the control circuit of the triac, the rectifier having its polarity disposed such that time-separated charging and triggering intervals are obtained. Across the rectifier there is connected a short-circulating circuit or providing triggering control voltages to the triac, even during the charging interval, thus preventing charging, which results in inhibition of the ignition sequence.

Abstract: A magneto flywheel includes arcuate ceramic magnets of non-uniform radial thickness. A rotor for the flywheel is made of soft material. The magnets of the magneto flywheel have a set of radial poles of alternating polarity, and an other set of opposite poles directed toward the cylindrical periphery of the magneto rotor. A ferromagnetic band of deflectible material with the surface projection is disposed between the rotor and the magnets.

Abstract: In the disclosed ignition apparatus for internal combustion engines provided with flywheel magnetos, the ignition spark interval is purely mechanically provided at the manufacturing stage. In the direction of rotation, the edges of both pole shoes and core legs which meet each other are sharply defined. The pole shoe, first in the direction of rotation, is formed so that it substantially coacts with the leg, second in the direction of rotation, when the leading edge of the second pole shoe comes into coaction with the front edge of the leg situated first.

Abstract: An electronic ignition system for use with a flywheel having a magnet comprises a unitary core carrying a trigger coil, an ignition coil and a charging coil, the latter being coupled through a charging rectifier and a storage capacitor to the ignition coil, the transient oscillations that are created by sparking discharge being damped in the core portion carrying the ignition coil, and the windings of the ignition coil being so directed and of such number that induced voltages therein fall below the sparking voltage of the spark plug during the flux alternating sequence produced by the passage of the magnetic poles.

Abstract: For an internal combustion engine, there is provided an electrical power generator system and an electronic ignition system both disposed under the flywheel casing. Permanent magnet means provide a rotating magnetic field for the generating coils of the generator system and the charging coils of the ignition system, there being a separate trigger magnet for creating a magnetic field for a trigger coil of the ignition system. A shielding plate of ferromagnetic material is fixedly disposed between the permanent magnet means and the trigger magnet to shield the trigger coil magnetically from the field of the permanent magnet means whereby it will respond only to the field from the weaker trigger magnet. Preferably, the shielding plate can be angularly adjusted and supports the trigger coil to enable adjustment of timing.