Twentieth century hand-book for steam engineers and electricians, with questions and answers .. (1905)
Swingle, C. F. [from old catalog], Horstmann, Henry Charles, 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] · Chicago, F. J. Drake & co. · leaf 479
ERS In Figs. 32 and 33 we show the incorrect way. By remembering that each one of the commutatorbars is the end of a coil, and then just mentally tracingthe current through the coils from one brush to theother, we can readily understand what the results arewhen the brushes are neglected and left in… … figure 33. of care can prevent damage to armature, commutatoror brushes, if a machine is permitted to be overloaded.Sometimes the commutator will contain one or morebars which, as the commutator gets old and wearsdown, will wear away either too fast or too slow, dueto the metal being harder or…
