The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 189
h quarterrevolution, and if each brush make contact with theapproaching segment before breaking contact with the 172 DYNAMIC ELECTRICITY AND MAGNETISM. receding segment, so as to bridge the intervening space,no intermission can occur. But as the coils, at each revolution, cut a varyingnumber of… … Fig. 71. though continuous, would be uneven, but with eightsegments, as shown in Fig. 70, it becomes at a highspeed of the armature practically even, being made stillmore even as the number of segments is increased. It is evident that the current cannot pass from onesegment to another without…
Electricity · Magnetism
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