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 252
stancecoils of the latter, through the heat developed, frequently breakin positions out of sight. If a defective contact of this naturecannot readily be seen, the contact arm should be moved slowlyover the contacts, as it is possible the broken coil may be cut outof circuit by this means. If a… … Figs. 744 to 746.—Cutler-Hammer motor starting rheostats with no voUage and overloadrelease. Fig. 744, starter with fixed button contact, fig. 74.T, with renewable button contact,and fig. 74G, with contact segments. In construction the resistance is enclosed in a pressedsteel box on which is…
Electrical engineering
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