St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 115
Fig. 152. These consist 112 THB ELECTRIC CURRENT TRANSFORMED. essentially of two belt-type machines on a common base,diredl coupled together, one machine acfting as a motor toreceive current at a certain voltage, and the other actingas a dynamo to give out the current usually at a differentvoltage.… … Fig. 153- machines, while the smaller sizes have but two bear-ings, the two armatures being fastened to a commonspider. Applications. The uses to which motor-dynamos areput are very various. They are extensively used in thelarger sizes as Boosters, for giving the necessary extraforce on long…
Electricity
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