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 336
posed of thousands of turns of fine wire, is wound overthe primary, similar to Fig. 283. The inner or primary coilis connected to a battery through an automatic interrupter,Fig. 285. At the make and the break of the primarycircuit currents areinduced in the sec-ondary according tothe laws of… … Condenser Fig. 285.— Diagram of Connections of a Spark Coil. Exp. 87: The students induction coil illustrated in Fig. 266, maybe mounted on a base provided with a contact screw and vibratorarm, when induced currents can be produced automatically from thesecondary coil. This arrangement is shown in…
Electricity · Magnetism
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