Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 285
. Their reliability, when suppliedwith electric energy from large city service mains, is equal tothat of the cells, but this cannot be said in the case ofsmall towns. The telephone companies sometimes employ MOTOR-GENERATORS. 273 dynamotors for the purpose of charging storage cells.Such a machine… … Fig. 175- means of heating surgeons electro-cauteries. Cauteryknives take from 3 to 8 amperes at 5 volts, while domecauteries take from 15 to 20 amperes at the samevoltage. III. Motor-Generators. — A motor-generator is a trans-forming device consisting of a motor mechanically connectedto one or…
Electric machinery
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