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 12
cient, possessing, as it does, possibilities in theway of better mechanical construction of the core, and in the 224 HAWKINS ELECTRICITY arrangement and fixing of the inductors thereon not to befound in the ring form. Less wire and magnetizing currentare required for the fie!d magnets for a given… … Fig. 249.—Modern form of Gramme ring armature. The core consists of a number of thinflat rings of well annealed charcoal iron, the outer diameter of each ring or disc beingUK inches, and its inner diameter 9X inches. Sheets of thin paper insulate each discfrom its neighbors to prevent the flow of…
Electrical engineering
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