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 49
resistance equal to one-sixteenth that of the total resistance of the entire ring. When the coils are connected in two circuits or series parallel, itrequires only two brushes at two neutral points on the commutator,for any number of poles; this arrangement is shown in fig. 269. THEORY OF THE… … Fig. 284.—Mordays method of measuring the variation of voltage around the commutatorby use of a single exploring brush and volt meter. It consists in connecting one terminalof the volt meter (preferably an electrostatic one) to one brush of the machine, and theother terminal to the exploring brush,…
Electrical engineering
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