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 472
rust very quickly on exposure to the air. Galvanized iron can be welded butthe coating must be burned off first, making the operation a trifle slower than with plainsheets. Copper, brass, bronze and aluminum are# usually unsatisfactory materials forwelding as they are such good conductors of… … \ CLAMPING TREADLfc.JEIFASING^TREADLE Fig. 4,507.—Toledo butt welder; view showing different parts. There are no auxiliary devicesrequired when installing a welder, except the switch, fuses and water supply. Two wiresrun to the machine from the source of supply. Connect these to the wires from the…
Electrical engineering
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