Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 46
of curves as shownin Figure 26. Everything above the neutral line Nbeing taken as representing E.M.P. in one directionand everything below as in the opposite direction.These curves show us also that the currents actuallygenerated in a dynamo-electric-machine are alternat-ing in direction and… … Figure 27 Figure 28 The nature and general construction of the commu-tator can be seen from Figure 27. It consists in thesesimple cases of two sections of copper connected tothe terminals of the coils arranged as an armature.If the coil equipped with such a commutator is nowrevolved, it will be…
Electrical engineering · Electric testing
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