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 1093
to the diagram of any winding will show that 1058 Steam Engineering the brush while collecting current is at the same time shortcircuiting one of the coils. In order that an excessive current may not be generatedin this short circuited coil it must be out in the interpolarspace at the time the… … Fig. 450 and deliver it to the outside wires in the case of a dynamo,and for the opposite in the case of a motor. There are many different designs and constructions ofbrushes and brush-holders, and these designs are broughtabout by the various ideas of different builders in their at-tempt to…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-640-275.webp)
