Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 493
removing after the completion of operations;they give off fumes which are injurious to the health, unless theybe placed by themselves in properly built and ventilated closets. The adverse conditions obtaining in the case of batteries, have resultedin the general adoption of suitable types of dynamo… … Fig. 4,546.—Optimus double commutator, belt driven electroplating dynamo having acapacity of 750 amperes at 6 volts, or 375 amperes at 12 volts. Two commutators are usedin order to keep down the current density in the commutator bars. so that the use of batteries becomes compulsory. In such cases,…
Electrical engineering
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