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 418
45 64 36 As will be noted from the table, most of the hard solders are alloysof copper and zinc. An easily fusible hard solder may be made ofone part copper to two parts zinc, this, however, makes a joint thatwill be weaker than when an alloy more difficult to melt is used. 3,072 HAWKINS… … Fig. 4,424.—Plumbers gasoline furnace, adapted to heating soldering pots and copper bolts.In construction, the gasoline supply for the blast passes through AA, and is providedwith valve H and clean out plug I. The lower end of the supply-extends nearly to thebottom of the reservoir. The gasoline…
Electrical engineering
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