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 433
uous solder is wipedoff with a clean damp rag.The surface should thenpresent a bright silveryappearance when properly tinned. Once a soldering bithas been well tinnedcare should be taken not SOLDERING AND BRAZING 3,087 to overheat it. If the bit at any time reach a red heat it will be nec-essary to… … Figs. 4,454 and 4,455.—Tinning block for electric soldering tool. It is made with two softbricks. One brick is used to support the soldering tool, and the other to contain thetinning material and to furnish a material which will keep the copper bit bright enough toreceive its coating of tin. Fig.…
Electrical engineering
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