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 325
one rodto the other and the arc thus formed will be maintained acrossthe gap in the circuit. Ques. How is the arc maintained ? Ans. By the conductivity of a bridge of carbon vapor allow-ing a continuance of current. 2,416 HAWKINS ELECTRICITY Ques. How is the carbon vapor produced? Ans. By the… … Figs. 3,324 to 3,329.—Various electric arcs. Fig. 3,324, normal shape of direct current openarc; fig. 3,325 direct current open arc with a rounded top on the negative carbon; fig.3,326 enclosed arc wich solid carbons; fig. 3,327 alternating arc; fig. 3,328 direct currentflame arc burning normally;…
Electrical engineering
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