Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 201
speed control. Thus, the inter-pole motorsof the Electro-Dynamic Company, Bayonne, New Jersey, havea practicable range of speed control from n revolutions perminute at greatest field excitation to /\n revolutions per minuteat the weakest permissible field excitation, whereas the practicablerange of… … Fig. 12 Company. The commutating poles are wound with coarse wireas above explained and these poles are small in area, being nar-rower than the main field poles and also shorter in the directionparallel to the shaft of the machine. 98. Standard ratings and guarantees. — In the early days…
Dynamos · Electric motors
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