Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 68
ionally to generate alternat-ing current from a D. C. source ofsupply. The distinguishing feature of these machines is the use of a single arma-ture for both A. C. and D. C, hence, but two bearings are required and the con-struction of the machine as a whole is simplified. These machines also… … Fig. 68—Cutler Hammer Type Field Rheostat.
Telegraph, Wireless
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