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 1248
It is the only methodthat can be used with ring armatures, and also with drumarmatures where the wire is to encircle the whole armature.The larger dynamos are now made mostly multipolar, andin these the coils do not return at nearly, or wholly, diam-etrically opposite points as they do in those… … Fig. 540 wound drum, or ring armature in connection with manypoles, it is not customary to do so. In general the coilwound on a multipolar armature has its return windingspaced about as far from the first turn, as it is from thecenter of one pole piece to the center of the next one. 865. How does…
