Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 223
of poles is not advisable except invery large machines, since it involves an increase in the expense FIELD MAGNETS 203 of machine work, fittings, etc., somewhat out of proportionto the reduction in cost of material and increase in efficiency. Ques. What materials are generally used for… … Figs. 205 and 206.—Solid and split construction of yoke for multi-polar dynamos. In thejattertype the yoke is in two halves joined along a horizontal diameter; while the upper halfmay be conveniently removed to give access to the armature, it has the disadvantage ofthe joint, which, no matter how…
Electrical engineering
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