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 378
3417 \7 Fig. 3,394—Lord flaming arc lamp for direct oralternating current and detail showing econo-mizer. In the view at the left the parts are: 3,414insulating block (grooved); 3,415, insulatingblock (plain); 3,417, bridging bar; 3,424, bondwire (with beads); 3,432, binding posts; 3,433,thumb nut;…
Electrical engineering
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