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 464
lling effect is overcome by using enough thermit steel to force the chilled portion upinto the riser and replacing it by metal which has practically the full temperature receivedduring reaction. The mould must be of a refractory material owing to the intense heat.When the mould and box are filled… … Figs. 4,492 and 4,493.—Thermit pipe clamps and mould. Fig. 4,492, pipes held in clamps.Mould partly assembled for thermit welding. Fig. 4,493, mould fully assembled readyfor weld.
Electrical engineering
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