Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 337
Fig. 286.^Students Induction Coil as aSpark Coil. 285. The current from the battery flows through the soft ironpivoted armature. A, free to move, to the stationary contactpost, C, the armature being held in contact with the point, C,by the spring, S. From C the current circulates around theprimary… … ~7 papeh. Fig. 287.—Detail of CondenserConstruction. minates in a piece of platinum wire and there is also a pieceof sheet platinum fastened to the vibrator arm at the point ofcontact with the screw C. Platinum is used to prevent theoxidation due to the spark at the contact points. The instantthe…
Electricity · Magnetism
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