Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 54
eutral field, idle, and the currents in each 50 Operating and Testing direction are generated by two coils under the influ-ence of each field and one under the influence of thethe other; but this latter coil is not generating in har-mony with the other two, it is actually opposing themas it is… … Figure 34 until they are at right angles to the neutral line thevoltage can be reduced to zero. If the brushes areshifted still farther the voltage will again begin torise but in the external circuit current will be in theopposite direction. In present day practice the brushes are used to reg-ulate…
Electrical engineering · Electric testing
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