Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 162
armature current could easily flowinto it. If this should be the case the current in the coil bwould have to be built up almost instantly and a large cur-rent would flow from the tip of the brush into the com-mutator bar c just as the bar was leaving* the brush.Enough current would flow, in fact,… … Figure 58 Current from armature 50 amperes. Brush covers half bar e all of b and half of a. Current into bar c, 12>^ amperes. Current into bar b, 25 amperes. Current into bar a, 12}4 amperes. Current through coil b, 12j^ amperes. Current through coil a, 12^ amperes. to make commutation still…
Electricity
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