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 111
e.—In the small and medium size dynamos, the coreis attached direct to the shaft. There are two kinds of core: 1. Smooth; 2. Slotted. ARMATURE CONSTRUCTION 323 Ques. What may be said of the smooth type of core? Ans. It has become obsolete, except in special cases, as formachines used for… … THREAD FORCOMMUTATORRETAINING NUT BEARING THREAD FORARMATURERETAINING NUT Fig. 350.—Laminated smooth core armature partly assembled. It consists of numerousdiscs of thin sheet iron threaded on the shaft and pressed together by end plates. Theobject of this construction is to prevent eddy currents.…
Electrical engineering
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