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 63
cuts, also some types of generator or gas making outfit. MOTION PICTURES 2,717 The Electric Arc—The subject of electric arcs has beenpresented at length in Guide No. 9, and it is only necessary totreat here of its special adaptation to optical projection. The only modification of the ordinary arc… … Fig. 3,858.—Challenge multi-tip acetylene burner. _ It has eight tips set in pairs at an angle.The gas comes from each set at an upward and inward angle, meeting to form one flame. Ques. What kind of current is used for the arc? Ans. Either direct or alternating Ques. How is the direct current arc…
Electrical engineering
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