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 235
D MAGNETS 215 Ques. Describe the methods of constructing spoolwound coils. Ans. The spool is made in various ways, sometimes entirelyof brass, or of sheet iron with brass flanges, or of very thin castiron. Some builders use sheet metal with a flange of hardwood,such as teak. If a spool be simply… … Fig. 238.—Method of winding magnet spool so that the two ends of the coil will come to theoutside. This method has also been used for induction coils, where it is desirable to keepthe ends of the wire away from the core and primary coil. layers. To avoid this difficulty, the wire is sometimes…
Electrical engineering
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