Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 148
running in one direction and indiagram B when the direction is reversed. The controller shown in Fig. 144 is supplied with a blow-outcoil A which produces a magnetic field that passes from the frontarms B to the back arms C, which arms are of iron. This magneticfield passes vertically through the… … / \
Electrical engineering
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