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 1196
rmature, 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 spiral, 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 thatwre have a uniform field, it is plain that the…
