Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 335
ndary circuit. 301. The In-duction Coil.— the transformer is utilized in induction coilTconWEd t°ogenerate very high^electromotive forces, capable of overeomW the resistance of the air and causing spark to pass SSJ2284\ w ln^ction coil, or Rhumkorffs inlctonum, Fig.284 w s.step-up-trawform*r since,… … Fig. 284.—Induction or Spark Coil.For use with direct currents. THE INDUCTION COlt. 3i» around which is wound the cylindrical primary coil, com-posed of several layers of heavy wire, while a secondary coilcomposed of thousands of turns of fine wire, is wound overthe primary, similar to Fig. 283.…
Electricity · Magnetism
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