An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 233
at one brush and,after passing through anexternal resistance, suchas a lamp, could be ledback to the armatureagain at the other brush.In this case the armaturecircuit is double, consist-ing of its two halves inparallel. The adding ofbrushes and the externalresistance to the Grammering is like… … Fig. 138. RiiiK armature with com-mutator. DIRECT-CURRENT GENERATORS 205 the same number of active conductors in each half of the arma-ture circuit, and so the current delivered by the armature isnot only direct but also steady. In practice, however, it would be difficult to make a goodcontact…
Electricity · Magnetism
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