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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 187

An illustration from The principles underlying radio communication, 1922, leaf 187 — 2 DYNAMO-ELECTRIC MACHINERY. At the four segments marked + or — contact is made withbrushes leading to the external circuit. By the right-handrule 10 the emf. in conductors under the N pole is toward theback end, so current flows into the armature at segment 3. Thebrush on that segment is therefore… … Scheme of A - po\a Drum Wl.ndin^l,?.3.«te. Commutator -.e.^m — nts T — + - Location of brvah«« &f},c.,ctc Armature conducTora *l,S. - r~i<»l<J ^oles the brushes, which are thus seen to be alternately, one positiveand the next negative, as we go around the commutator. Ifa machine having…

Telegraph, Wireless · Radio

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