Showing papers on "Magneto published in 1976"

Transistor ignition circuit

Abstract: The present invention discloses an ignition system for internal combustion engines. The ignition system is particularly applicable to such engines including a magneto. The ignition system includes a semi-conductor ignition circuit in which a first transistor has its collector-emitter conduction path connected in series with the primary winding of an ignition coil assembly. A resistor is connected between base and collector of the first transistor to permit it to conduct. A control circuit connected between the base of the first transistor and the primary winding, turns the first trnasistor off when it is desired to interrupt the primary winding current. The ignition system also includes a magneto ignition coil assembly which has a low inductance primary winding having a relatively low number of turns. The coil assemblies of the present invention are generally unsuitable for use with conventional mechanical breaker points.

Power frequency converter

Abstract: Circuitry for converting the nominally 600 hertz output of a gasoline engine driven magneto to 60 hertz. A pair of oppositely poled controllably enabled full wave rectifiers is connected to the magneto and the load. A zero crossing detector is coupled between the magneto and a counter. A rectifier control circuit is responsive to the counter output for controlling which of the full wave rectifiers is enabled.