The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 169
construction generally used onlarge machines, one reason being that it makes the armatureeasier to insulate. But it is also possible to have the field mag-nets stationary while the armature is made to revolve. Small 164 DYNAMO-ELECTRIC MACIIIN ERY. machines are often built this way. The principle… … Fig 103.—Circuit diagram of revolving-armature alternator. A, arma-ture ; F, frame ; P, poles ; R, collector rings ; B, brushes ; TT, termi-nals of field circuit; XX, leads to external circuit. When a is passing under the AT pole, coming toward the reader,the electromotive force in it is to the…
Telegraph, Wireless · Radio
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