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 235
Brush Holder Fig. 139. — Commutatorand brush with itsholder. 206 ELECTRICITY AND MAGNETISM which the wires lie (Fig. 140). Since the active wires in oneslot are connected across the end with active wires in anotherslot, there are no idle wires inside the core. … Fig. 140. — Slotted armature core, drum type. Partly wound. 144. Field magnets. The magnetic field in which the arma-ture revolves is ordinarily produced by a great electromagnet.The frame of this electromagnet (Figs. 141 and 142) is so ar-ranged that it can hold the windings required to set up the…
Electricity · Magnetism
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