Practical electricity, with questions and answers (1901)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 103
ure. In the other style of bipolar machine the leakage co-efficient is less than 1.1. The reason that it is so muchlower is that only a small surface of fully charged pole isexposed to the air. In the case of the Edison dynamo Fig. 39) the verylarge pole pieces N. and S. are exposed to the air and… … Figure 40Magnetic leakage in internal pole bipolar frame. Another great advantage of the internal pole type isthat what leakage there is is inside the machine, where itis not apt to draw wire nails and bits of iron dust; but inthe case of the Edison dynamo the magnetic leakage willattract all the…
Electricity · Electric generators
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