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 185
DYNAMO-ELECTRIC MACHINERY. At the four segments marked + or — contact is made withbrushes leading to the external circuit. By the right-handrule 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… … Fia. 113. Scheme oj -4 - t^o!<= Drorn Wi.ndin^ \,7,3 .etc . CommoTATof a>e-2j^*^^ 1 *■ ~ Loo<itior\ of broihes 3,b,c., etc.. Arm«sitijre c-orvcJocTor^ ^J,S>. - Fi<sl<J bol«5 the brushes, which are thus seen to be alternately, one positiveand the next negative, as we go around the…
Telegraph, Wireless · Radio
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