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- · New York, T. Audel · leaf 161
n order to suittheir regulating devices. If the direction of current generated by a dynamo be oppositeto that desired, the two leads should be reversed in the ter-minals, or the residual magnetism should be reversed by acurrent from an outside sovu-ce^ JNn^^y^^y. «^ *^if Cr^frCAT»,«•*.«.. 580… … Figs. 671 and 672.—Tinning block for electric soldering tooL It is made with two soft bricks.One brick is used to support the soldering tool, and the other to contain the tinningmaterial and to furnish a material which will keep the copper bit bright enough to receiveits coating of tin. Fig. 671…
Electrical engineering
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