Tesla coil oscillator
Summary
A Tesla coil, built by the inventor Nikola Tesla as early as 1891, in operation. It is a resonant transformer circuit that produces very high voltages, which creates the brush discharge, several feet long, escaping from the top of the conical coil. The multiple spark gap which excites the primary can be seen at left. The source says Tesla invented the conical coil shown.
Caption:A "Tesla" Conical High Frequency, High Potential oscillator Coil Delivering a Very Powerful Discharge Several Feet in Diameter. The Condensers May Be Seen at Right and Left of Coil, as Well as 50,000 Volt D. C. Dynamo in Foreground.
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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