Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 638
THOMSON S SPHERICAL MACHINE. 617 current is in a given direction, and then through another phase,during which the current is in the other direction. Each sectionis cutting lines of force of one polarity during one-half of therevolution, and of the opposite polarity during the other half.The… … Fig. 408. They are attached to the shaft of the field magnet, as shown atB, in fig. 407, and the brushes point outward on the inside surfaceof the commutator segment. The brushes are adjusted to makecontact with the commutator at points corresponding to the neu-tral portions of the ring. The…
Electrical engineering
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