Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 554
e first machines made years ago by ThomasEdison there were only two magnets, and therewas such a small coil of wire that he had torevolve the cylinder, upon which it was mounted,at a tremendously high rate of speed to make upfor it. And even then, at over two thousandrevolutions per minute, he got… … FIG. 3. DIAGRAM OF SIX-POLE GENERATOR, END VIEW. A, commutator segments; B, brushes; C, coils of wire collectingpressure impulses; D, wire connecting negative brushes; E, wireconnecting positivebrushes; N-S, the field magnets —N, north poles;S, south poles; +, the positive, or outflowing, current;…
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