Practical electricity, with questions and answers (1901)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 159
hich it is ap-proaching. The E. M. F. generated in the coil b will be op-posite to that generatedwhile the coil was underthe influence of the northpole; therefore, as soon asthe coil b is shortcircuitedby the brush theE.M.F.setup therein tends to reducethe current in the coil tozero and next to… … Figure 56 Diagram of correct and sparkless commutation. 147 ditions obtain, there is no possibility of any arcing betweenthe commutator bars and the brush, and consequently thecommutation is sparkless. It is necessary that the coil bshould be in a field which will not tend to increase thecurrent…
Electricity · Electric generators
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