The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 334
it if the driving speed is kept constant.In the generator most generally used for telephone work thenumber of armature windings and commutator plates is 175. Dynamos are called series or shunt machines ac-cording to whether the field-magnet coils are joined up inseries or in shunt with the… … EXT CIRCUITFig. 309 magnet coils of shunt machines are generally wound to a muchhigher resistance than the armature. In compounddynamos a combination of both seriesand shunt windings is used. Figs. 308, 309 and 310 show howthe field-magnet coils are connectedin a series, a shunt, and a…
Telephone
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