Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1255
Fig. 546 The brushes may be improperly set. The brushes may notmake sufficient contact with the commutator. The com-mutator may be rough or worn. The fields may be ofuneven strength. 881. How can a wrong connection of the coils be testedfor? Ans. In order to see how this test can be made let…
