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Nikola Tesla patented the Tesla coil circu … Nikola Tesla patented the Tesla coil circuit on April 25, 1891. and first publicly demonstrated it May 20, 1891 in his lecture "Experiments with Alternate Currents of Very High Frequency and Their Application to Methods of Artificial Illumination" before the American Institute of Electrical Engineers at Columbia College, New York. Although Tesla patented many similar circuits during this period, this was the first that contained all the elements of the Tesla coil: high voltage primary transformer, capacitor, spark gap, and air core "oscillation transformer".p, and air core "oscillation transformer".
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Primary circuit, showing oil capacitor bank ', 40 kV supply transformer and rotary spark gap ', and part of secondary winding
, Light bulb powered wirelessly by "receiver" coil tuned to resonance with the huge "magnifying transmitter" coil at Tesla's Colorado Springs lab, 1899.
, Coil in operation, at -12 million volts. The 10 ft diameter "extra" coil is shown. The 51 ft diameter secondary coil is visible dimly in background, and in the previous photo.
, Small Tesla coil for electrotherapy, 1905. The Tesla transformer is immersed in a tank of oil for insulation to prevent arcs.
, Henry Rowland's 1889 spark-excited resonant transformer, a predecessor to the Tesla coil.
, Longwave spark diathermy machine using Tesla circuit, 1921.
, Elihu Thomson's Tesla coil, published February 1892, identical to Tesla's except for a compressed air spark blowout .
, Demonstrating 10 inch brush discharge from hand, 1913
, Spark transmitter circuit from Marconi's 1900 patent. Its similarity to a Tesla coil can be seen; the only difference is the addition of a variable inductor to tune the antenna to resonance.
, Demonstration of inductance with a Tesla coil, 1906. RF current will not pass through the heavy copper wire because of the bend, and passes through the lamp instead.
, 3.15576E9
, Electrotherapy treatment of diabetes with a vacuum electrode, 1922. The series spark gap is visible mounted on the front of the machine.
, Combined Tesla / D'Arsonval / Oudin electrotherapy and x-ray outfit 1907
, A violet ray wand, a handheld Tesla coil sold as a quack home medical device until about 1940. Said to cure everything from carbuncles to lumbago.
, Powerful spark-gap transmitter, showing series spark gaps , Leyden jar capacitors , and resonant transformer
, --04-25
, Tesla electrotherapy coil manufactured by Adolphe Gaiffe, around 1900. The primary capacitor is in the box; the spark gap is mounted on top.
, RF current from Tesla coil lights the bulb's filament as it passes through the wire to charge and discharge the performer's body, which acts as a capacitor plate.
, Steps in Tesla's development of the Tesla transformer around 1892. Closed-core transformers used at low frequencies, rearranging windings for lower losses, removed iron core, partial core, final conical Tesla transformer, Tesla coil circuits
, Tesla's proposed wireless power system, from his 1897 patent. The transmitter ' consists of a Tesla coil ' driving an elevated capacitive terminal ' suspended by a balloon '. The receiver is a similar terminal and resonant transformer.
, Design on which the Wardenclyffe plant was based, from Tesla's 1902 patent
, --05-20
, Famous image of magnifying transmitter in operation with Tesla sitting next to it. This is a "trick" photo, a double exposure; Tesla was not in the room when the coil was operating.
, Effluvation treatment of knee with an Oudin coil , a high voltage transformer similar to a Tesla coil, 1915
, Discharge of same coil with a metal sphere capacitive terminal
, "Electrice" lighting a candle with brush discharge from her fingers. The current came from the electric chair she is touching, which is connected to the Tesla coil in the background.
, Diathermy of elbow 1945
, "Electrice" sideshow performer being "electrocuted" 1914
, Evangelist Irwin Moon shooting "lightning bolts" from fingers, 1938.
, Vacuum electrode "violet ray" wand in operation.
, Wardenclyffe Tower wireless station, essentially a huge Tesla coil intended as a prototype transatlantic radiotelegraphy and wireless power transmitter, built by Tesla at Shoreham, NY, 1901-1902. It was never completed.
, Treatment of cancer with an Oudin coil , 1910. The induction coil that powers the Oudin coil is behind the patient's head.
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The huge "magnifying transmitter" coil at … The huge "magnifying transmitter" coil at Tesla's Colorado Springs laboratory, 1899–1900, photos by photographer Dickenson Alley December 1899. The long arcs shown above were not a feature of the normal operation of the transmitter because they wasted energy; for these photos Tesla forced the machine to produce arcs by switching the power rapidly on and off.by switching the power rapidly on and off.
, Turn-of-the-century sideshow performers did stunts with Tesla coils that would be considered extremely dangerous today.
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, US patent 1119732 Nikola Tesla 1907 Apparatus for transmitting electrical energy.png
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, Tesla Colorado Springs lab-magnifying transmitter with metal ball.jpg
, Hercules Tesla-Thomson electrotherapy unit 1907.jpg
, Treatment of knee with Oudin coil.jpg
, Tesla Colorado Springs lab-12 million volts.jpg
, Preacher shooting sparks from fingers 1938.jpg
, Electrice sideshow act 1914 - lighting candle with fingers.jpg
, Tesla Colorado Springs lab-primary circuit of Magnifying Transmitter.jpg
, Nikola Tesla, with his equipment Wellcome M0014782 - restoration2.jpg
, Tesla Broadcast Tower 1904.jpeg
, Spark diathermy machine 1921 parts labeled.jpg
, System of electric lighting - Nikola Tesla US patent 454622 fig1.png
, Transtrom's Tesla coil stunts - brush discharge from hand.jpg
, Diabetes electrotherapy with vacuum electrode 1922.jpg
, Transtrom's Tesla coil stunts - lighting bulb in mouth.jpg
, TeslaWirelessIllustration.png
, Powerful spark gap transmitter.png
, Tesla drawing 1899 - Evolution of Tesla transformer.png
, Early Tesla coil drawing 1891.png
, Rowland resonant transformer.jpg
, Diathermy of elbow 1945.jpg
, Tesla coil .jpg
, US Patent 645576 Nikola Tesla 1897 System of transmission of electrical energy.png
, High frequency inductance experiment 1906.jpg
, Ducretet Tesla coil.jpg
, Elihu Thomson's Tesla coil circuit Feb 1892 rotated.png
, Violet wand.JPG
, The treatment of cancer by cytolsis. Wellcome M0015160.jpg
, Tesla coil at Griffith Observatory LA.jpg
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Nikola Tesla patented the Tesla coil circu … Nikola Tesla patented the Tesla coil circuit on April 25, 1891. and first publicly demonstrated it May 20, 1891 in his lecture "Experiments with Alternate Currents of Very High Frequency and Their Application to Methods of Artificial Illumination" before the American Institute of Electrical Engineers at Columbia College, New York. Although Tesla patented many similar circuits during this period, this was the first that contained all the elements of the Tesla coil: high voltage primary transformer, capacitor, spark gap, and air core "oscillation transformer".p, and air core "oscillation transformer".
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History of the Tesla coil
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http://dbpedia.org/resource/Colorado_Springs_Notes +
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