Wikipedia

File:Tesla high-frequency apparatus (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg

Original file ‎(960 × 540 pixels, file size: 77 KB, MIME type: image/jpeg)

Summary

Description
English: "D'Arsonval apparatus", invented by French physicist and doctor Jacque Arsene D'Arsonval around 1890 used in an obsolete Victorian-era medical field called electrotherapy. It was a high frequency resonant "oscillation transformer" similar to a Tesla coil without the secondary winding, which generated high voltage, high frequency electricity. It consisted of an induction coil (rear) that generated a high voltage of around 4 - 15 kV. This repeatedly charged the two Leyden jar capacitors, which repeatedly discharged with a spark through the spark gap. The capacitors together with the solenoid coil (front) formed a tuned circuit and the spark excited damped oscillations in the tuned circuit. The device produced an oscillating voltage of 20 - 30 kV with substantial current at frequencies of around 300 kHz - 5 MHz. Wires from both ends of the coil to electrodes applied the current to the patient's body. It was used for diathermy (deep heating of tissue) and several other therapies.
Date
Source Scan from Kennedy, Rankin (1903 edition (five volumes) of pre-1903 four volume edition.) Electrical Installations, vol. V, London: Caxton
Author Andy Dingley (scanner)
Permission
(Reusing this file)
Public domain

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.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
Other versions

other:Tesla high-frequency equipment (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg(Template:Len:Tesla high-frequency equipment (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg)

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current14:55, 29 June 2010Thumbnail for version as of 14:55, 29 June 2010960 × 540 (77 KB)Andy Dingley{{Scans from 'Rankin Kennedy, Electrical Installations', 1903 |volume=V |page= |figure= |title= |description= }} Category:Tesla coils
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Retrieved from "https://en.wikipedia.org/wiki/File:Tesla_high-frequency_apparatus_(Rankin_Kennedy,_Electrical_Installations,_Vol_V,_1903).jpg"