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 224
o using wrought iron for the core since,on account of its small size, the length of each turn of the 204 HAWKINS ELECTRICITY magnetizing coil is reduced. For heavy yokes, where lightness isnot essential, but very often the reverse, cast iron is used, asits cross section can be made larger than that… … Pigs. 207 to 209.—Various sections of cast iron yoke. In form, these yokes may be eithercircular or segmental as shown in figs. 205 and 206.
Electrical engineering
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