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 122
the latter should be thor-oughly insulated. Japan or en-amel insulation is not sufficientbecause it is liable to have bub-bles or minute holes in it, or bepierced by particles of metalor by the rough edges of the corediscs. Two or more layers ofstrong paper, fibre, canvas ormica, should be applied… … Fig. 367.—Holzer Cabot partially wound barrel wound armature showing arrangement ofcoils. The core is built up of thin discs of soft annealed steel, which are slotted to allow thewire to sink below the surface, this being sometines called iron clad construction. Thediscs are held by end plates,…
Electrical engineering
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