File:Oudin coil.png

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Summary

DescriptionOudin coil.png	Woodcut of an early Oudin coil, a high voltage resonant transformer similar to a Tesla coil, invented by French physician Paul Marie Oudin around 1899 for use in medical electrotherapy. Components from the right: induction coil (black box), 2 Leyden jars, adjustable primary coil (small horizontal coil), resonator or secondary coil (vertical coil), and spark gap (on top of coil). In this early type the secondary coil was not magnetically coupled to the primary coil, just connected to a tap on the primary. The tap on the primary was adjusted until the primary circuit resonated at the same frequency as the secondary. In use, a wire from the high voltage terminal on the top of the secondary went to an electrode on a long insulated handle, which the doctor held to apply the high voltage streamer discharge to the patient's body. Caption read: "Isenthal-Oudin Resonator". Alterations to image: Rotated image 90° CW, cropped out caption, converted to 32 color PNG.
Date	1908
Source	Downloaded from Frederick Finch Strong (1908) High Frequency Currents, Rebman Co., New York, p.69, fig.43 on Google Books
Author	Frederick Finch Strong
Permission (Reusing this file)	Public domain - published in USA prior to 1923.

Public domain	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.	United States
	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
current	02:39, 22 May 2008		967 × 748 (109 KB)	wikimediacommons>Chetvorno	{{Information \|Description=Woodcut of an early Oudin coil\|. The Oudin coil was a high voltage resonant transformer similar to a Tesla coil, invented by French physician [[Wikipedia:Paul Oudin\|Paul Marie O

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