Showing papers on "Magneto published in 1978"

Magneto ignition system for an internal combustion engine

Abstract: To prevent reverse-direction operation of an internal combustion (IC) engine to which the ignition system is connected which, possibly, may lead to dangerous conditions if the IC engine is used, for example in a chain saw, lawn mower, or the like, a diode (35) is connected across a second, ignition instant modifying R/C circuit (34, 33) in the control network (29) of the magneto ignition system, which includes a first R/C circuit (30, 31) to provide for immediate conduction of a control transistor (27) and hence blocking of a controlled ignition transistor (21) and disconnection of the ignition system in case of reverse rotation. This system is a further development of the basic ignition system described in U.S. Pat. No. 4,188,929, to which reference is made.

Breakerless flywheel magneto ignition system

Abstract: In a flywheel magneto ignition system, opposite terminals of the primary winding are respectively connected with the collector and emitter terminals of a transistor device. A biasing coil, inductively coupled with the magneto armature core, has its terminals respectively connected to the transistor base and emitter terminals to bias the transistor on during an interval terminating at the time of ignition. An SCR, non-conductive during said interval, is connected for short circuiting the biasing coil. A trigger coil, connected with the SCR gate through a zener diode, provides gating current for the SCR at the time of ignition. A diode in series with the biasing coil and the base-emitter junction of the transistor ensures fast transistor turn-off.

Magneto-acoustic oscillations in a current carrying plasma column

Abstract: The forced radial magneto-acoustic oscillations in a partially-ionized, low- beta plasma column with non-uniform densities, temperature and axial current are investigated theoretically. By using a method of successive approximations to include resistive and viscous dissipations, the description of these oscillations has been reduced to the solution of a second order differential equation in the axial magnetic field disturbance bz(r). A detailed numerical solution is presented for a case where the plasma carries a force-free current and the dissipation is resistive. The steady current enhances the magnetic field amplitudes at magneto-acoustic resonance.

Production for rotor of flywheel magneto

Abstract: PURPOSE:To provide a low cost rotor of a flywheel magneto which is capable of providing sufficient airflow by constituting same such that a Silocco fan shaped from a sheet of metal plate by press work is attached to the flywheel.