Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 161
Fiq. 70. Fig. n. Mr. Edison accomplishes this object by constructing the arma-ture in the shape of a disk or plate like that used by Arago inhis experiments, but divided into radial sections. These radialsections, which, form the inductive portion of the armature, arenaked copper bars connected…
Electrical engineering
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