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 1211
he methods of winding used with bi-polarfields. As has been explained elsewhere there are many con-ditions where the use of a bi-polar field is not advisable, andnumerous advantages are gained by using a multi-polar field,or a field consisting of more than one pair of poles. The same general… … Fig. 525 schemes of winding which are in the main only extensionsof the principles here shown. Fig. 524 shows an armature winding, with its develop-ment, Fig. 525, consisting of 18 conductors and a 4-polefield. Following out the circuits from one commutator seg-ment to the next or the developed…
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