Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 129
position shown in fig. 36A the pressure is 0. Thus arise and fall of potential is producedduring each half revolution. Becauseof this wavelike changeability, andbecause the commutation of largecurrents is impractical at the fullpressure required by our industries,the one coil was replaced by… … Fig. 37. ELECTRICAL ENGINEERING 129 brushes are sliding. (See fig. 37.) The two brushes are setso as to take the current from the coils which at the momentare cutting the lines of force at the least angle. The currentthrough the armature, from the negative to the positive brushflows in two paths,…
Electrical engineering
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