File:Tesla coil oscillator.gif
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English: 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. |
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| Source | Samuel D. Cohen, "Dr. Nikola Tesla and His Achievements" in The Electrical Experimenter magazine, The Experimenter Publishing Co., New York, Vol. 4, No. 10, February 1917, p. 713, fig. 3 | ||||||||||||||||||||
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:56, 16 May 2011 | | 960 × 1,314 (435 KB) | GLPeterson (talk | contribs) | {{Information |Description ={{en|1=Fig. 3. "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 |
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