Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1242
d ring armatures only. 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… … Fig. 540 wound drum, or ring armature in connection with manypoles, it is not customary to do feo. 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…
