Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 727
aced by a flat rectangulargalvanometric helix, so constructed as to embrace as perfectly aspossible the curve of the armature. The changes of direction inthe current took place in the galvanometric helix, and, the polesof the armature always remaining the same, there were no illeffects due to… … Fig. 469. In the interior of the hollow sphere a spherical electro magnet,with an iron core, N, revolves around an axis, a. The flatsprings, L L, press against the solid parts of the commutator insuch a way as to send into the wire, / a current always of thesame direction; but the springs, 11\…
Electrical engineering
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