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 1190
mature^ as the cross connectors ondrum armatures also form an inactive part of the circuit. In Fig. 514 is shown a simple ring wound armature witha bi-polar field. The end of one coil is connected to thebeginning of the next^ and the winding therefore forms acontinuous spi-ral^, encircling the iron… … Fig. 514 tator as the case may be. It will be seen that with an arma-ture of this kind each individual coil is generating an electro-motive force which is proportional to the number of lines offorce being cut by the coil. Assuming for the present thatwe have a uniform field, it is plain that the…
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