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 375
atisfactorylight when the arc voltage drops below 65, while the metallic arc willgive good results when the drop across the arc is less than 55 volts. Another advantage of the metallic arc lies in the increased length ofthe life of the electrodes over that of the enclosed carbon arc,… … Fig. 3,391.—Electrode arrangement of Westinghouse metallic flame arc lamps. As shown,the larger portion of the light comes from the flame which always surrounds the negativeelectrode and the natural light distribution results when the negative electrode is arrangedabove the positive. This…
Electrical engineering
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