GB528679A - Magneto - Google Patents

Abstract

528,679. Magnetos. BOHLI, J. March 18, 1939, No. 8743. Convention date, April 1, 1938. [Class 35] In a multiple-winding magneto with a magnet system common to a number of magnetic circuits independent of each other and regularly distributed about the rotor axis, the primary and secondary winding of each firing circuit are distributed into at least two coils each comprising parts of the primary and secondary winding, these parts being connected in series to the corresponding parts of the other winding, so that each coil is arranged on a magnetic circuit which is independent of that of the other coil or coils of the same winding. In the form shown, the stator comprises six cores 5 each with a primary and a secondary coil 7, 6 disposed symmetrically about the shaft 2 and held between walls 23. The upper ends of the cores are bridged by sheet iron packets let into the upper wall. The shaft carries a rotor having six symmetrically spaced cylindrical magnets .3 bridged by sheet iron packets 4 with the polarities shown in Fig. 2, a distributer rotor 13 and cams for circuit breakers 8, 9, 19 disposed in a recess in the distributer member 11. The firing connections are as shown in Fig. 4, in which the rotary distributor plate 13 bridges contact pairs 14, 20 in series with series-connected pairs of primary and secondary coils 7, 6 on different magnetic circuits.