File:Resonance apparatus (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg
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DescriptionResonance apparatus (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg |
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 (not shown) 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 (in box, top). 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 treatment of diseases. |
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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) | |||||
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current | 14:52, 29 June 2010 | 702 × 769 (82 KB) | Andy Dingley (talk | contribs) | {{Scans from 'Rankin Kennedy, Electrical Installations', 1903 |volume=V |page= |figure= |title= |description= }} Category:Induction coils |
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