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
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. … Figs. 4,494 to 4,496.—Thermit pipe welding operation. Fig 4,494, slag flowing into mouldand coating inside of pipe and inside of mould. Fig. 4,495, slag in mould and steel following,displacing slag in bottom part. Fig. 4,496, both slag ana steel in mould but steel separatedfrom pipe and mould by…
Electrical engineering
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