Tesla oscillators - Electrical Experimenter July 1919 p 228
Summary
Collection of Tesla coils in 1919 built by the inventor, Serbian-American engineer Nikola Tesla. They consist of an induction coil or transformer, an interrupter to repeatedly interrupt the primary current, a capacitor, and a resonant air core transformer consisting of a few turns of heavy wire primary around a secondary of many turns of fine wire, connected to the high voltage binding posts. Some contained a vibrator interrupter, some a mercury interrupter. These small compact Tesla coils were produced by Tesla for industrial purposes such as powering his gas discharge lamps and for producing ozone for water purification. A technical article describing how they work and giving circuit diagrams is "Tesla circuit controllers for obtaining oscillatory currents of high frequency" in The Electrical Engineer, New York, Vol. 26, No. 538, August 25, 1898, p. 180-182
Nikola Tesla (1856–1943) Serbian American inventor and engineer who discovered and patented the rotating magnetic field, the basis of most alternating-current machinery. He also developed the three-phase system of electric power transmission. He immigrated to the United States in 1884 and sold the patent rights to his system of alternating-current dynamos, transformers, and motors to George Westinghouse.
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