International Library of Technology · Scranton, International Textbook Co. · leaf 227
14. The resistance coil is made up of a coilof German silver wire R, insulated with silk,wound on a wooden bobbin, or spool, 5.Through the head of the spool two pieces ofheavy copper wire /, t are driven, the ends ofthe resistance coil being soldered to thesewires; they form the terminals of the… … Fig. 1014. slipping the two terminal wires through those holes, andclamping them in position by means of the milled-headscrews. With each bridge are furnished two resistance coils, oneof 1 ohm, the other of about 10.5 ohms, resistance. Thesemay be readily distinguished, as the 1-ohm coil is…
Electrical engineering
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