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- · New York, T. Audel · leaf 160
dinary series, shunt, or compound bipolardynamos may be reversed by simply reversing the brusheswithout changing any of the connections, then changing thepoint of contact of the brush tips 180°. In multipolar dynamos, a similar change, amounting to 90°for a four pole machine, and 45° for an eight… … Fig. 670.—Method of assembling core discs. For this operation two wooden horses should beprovided to support the core at a convenient height, as shown in the illustration. This rule does not apply to arc dynamos and other machines,which have to be run in a certain direction only, in order to…
Electrical engineering
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