Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 410
io. The field-magnets are placed horizontally, andconsist of 12 cylindrical iron bars overwound with wire, united tosolid-iron pole-pieces weighing many tons. Between the upperand lower pole-pieces rotates the armature, which is a modifica-tion of the dmm-armature of Siemens, and is made up of 9S… … CHAP. X.] ELECTRICITY AND MAGNETISM. 385 long rods of copper connected by copper discs at the ends insteadof coils of wire. The commutator or collector consists of 49parallel bars of copper, like the split-tube commutator of theother machines. The circuit of the armature runs from one barof the…
Electricity · Magnetism
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