Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 37
or had 32 field poles, the frequency willbe 32 X 30 or 960 alternations correspond-ing to 480 cycles. The student should understand that theforegoing description and drawing simplyshow in an elementary way the construc-tion and functioning of a generator. Thediagram is merely intended to indicate… … ELECTROMAGNETIC INDUCTION. 27 36. Direct Current Dynamo.—Direct current is obtained from dynamo coilsby a commutator, which, is placed on one end of the armature driving shaft. Insimple form it consists of a split brass or copper ring of two parts, C, D, whichis thoroughly insulated from the…
Telegraph, Wireless
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