Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 436
cial permission. 399 ELECTRIC WELDING The iinifonnity of the work, the control of the operation, theextreme localisation of the heat to the particular ])arts to beunited, and tlie fact that the process is not limited to iron andsteel, l)Ut can deal equally well with other metals, such as… … ELECTRIC WELDING MACHINE FOR IRON AND STEEL PIPE. which receives current from an electric station or dynamo gener-ator, at a voltage usually from one hundred to five hundredtimes that required to make a weld. The copper secondary circuitof the transformer is generally only a single turn of verj…
Electrical engineering
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