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 248
RENEWABLECONTACTS … Figs. 737 and 738.—Sliding contact starters. Fig. 737, starter with button contacts; fig. 738,starter with renewable contacts. Motor starters in which the successive steps of resistanceare cut out by a pivoted lever carrying a contact shoe which slides over button contactsor over contact segments,…
Electrical engineering
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