File:Oudin electrotherapy outfit.jpg
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Summary
[edit]DescriptionOudin electrotherapy outfit.jpg |
English: Oudin coil therapy equipment used in the Victorian-era medical field called electrotherapy from about 1900 to 1930. The Oudin coil (right) is a spark-excited resonant transformer circuit similar to a Tesla coil, which generates very high voltage, low current, high frequency electricity. A handheld electrode attached by a wire to the coil's high voltage terminal at top produces streamer arcs which were applied to the patient's body to treat various medical conditions. The induction coil (center) produces a potential of 2 - 15 kV which powers the Oudin coil oscillator, which generates 200 - 1000 kV at a frequency of 200 kHz to 5 MHz. The switchboard (left) contains the interrupter power supply which produces the pulsing DC current which powers the primary of the induction coil. The couch (foreground) was called an "auto-condensation couch". Its metal back acted as a capacitor plate to apply the currents to the patient's entire body. The return path for the current was through the ground electrodes on the arms, which the patient would grip. High frequency therapy was not generally painful for the patient, because currents of this frequency do not cause the sensation of electric shock Caption: "Complete installation for high frequency treatment, comprising switchboard with dipper-break, coil, Oudin-Dean resonator, and couch for auto-condensation" |
Date | |
Source | Retrieved December 5, 2014 from Chisholm Williams 1903 High-Frequency Currents in the Treatment of Some Diseases, Rebman, Ltd., London, frontispiece on Google Books |
Author | Chisholm Williams |
Licensing
[edit]Public domainPublic domainfalsefalse |
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. | |
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Annotations InfoField | This image is annotated: View the annotations at Commons |
Oudin coil
Leyden jar primary capacitors
Induction coil to power the Oudin coil
Mercury interrupter breaks primary current to induction coil
Power panel to control primary current to induction coil
"Condensing couch" for applying high voltage to patient's entire body.
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