Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 392
DIRECT CURRENT DYNAMOS. 373 … Fig. 357. -Magnetic Circuit of ManchesterField Frame. yokes are cast iron, the lower one forming the bed-plate,and the magnet cores are of soft wrought iron. The magnetcoils are connected so that the upper end of each limb tendsto produce the same pole, a consequent pole is thus formed ineach yoke,…
Electricity · Magnetism
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