Image: Early Tesla coil drawing 1891

Description: 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..
Title: Early Tesla coil drawing 1891
Credit: Retrieved May 1, 2015 from Thomas Cummerford Martin (1894) The Inventions, Researches and Writings of Nikola Tesla, 2nd Ed., The Electrical Engineer, p. 193, fig. 127 on Google Books. The schematic is a copy of an illustration used by Nikola Tesla in his May 20, 1891 lecture before the American Institute of Electrical Engineers at W:Columbia College, New York reprinted as Nikola Tesla, "Experiments with alternate currents of very high frequency and their application to methods of artificial illumination" in Electrical World magazine, W. J. Johnson Co., New York, Vol. 18, No. 2, May 20, 1891, p. 26, fig. 32
Author: Nikola Tesla
Usage Terms: Public domain
License: Public domain
Attribution Required?: No