Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 674
Fig. 437.which they are made of malleable cast-iron. Fig. 437 repre- THE CABELLA ARMATUKE. 653 sents a machine designed for experimental purposes, and for usein schools and colleges. Fig. 438 shows a form of generator … Fig. 438. designed for telephone exchange use, for ringing bells and drop-ping annunciators; and is said to be*capable of satisfactorily-working the longest trunk lines. THE CABELLA ARMATURE. The axle of the Cabella armature is covered with an insulat-ing coating, in which, are fixed, in suitable…
Electrical engineering
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