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Early Tesla coil drawing 1891 - Public domain portrait drawing
Summary
One of the first drawings of a Tesla coil circuit, an illustration used by Nikola Tesla in his May 20, 1891 lecture Experiments with Alternate Currents of Very High Frequency and Their Application to Methods of Artificial Illumination before the American Institute of Electrical Engineers at Columbia College, New York. In this lecture he introduced the circuit as a means of generating high voltage, high frequency alternating current for a "wireless" lighting system. He patented the circuit April 25, 1891..
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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