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 89
thin that a brush of the proper thickness to collect thecurrent would lap over, or bridge several segments. COMMUTATION AND THE COMMUTATOR 301 Types of Commutator.—Commutators are made in variousforms, but they may be grouped into two general types: 1. Commutators for closed coil armatures; These… … Fig. 328.—A large current low voltage bipolar dynamo built for electrolytic work and hereshown to illustrate the large size commutator and brushes necessary to collect the largecurrent. Carbon brushes would not be suitable for this class of machine because evenwith copper brushes, whose…
Electrical engineering
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