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Electrodeless fluorescent lamp having a radio frequency gas discharge excited by a closed loop magnetic core

  • US 4,017,764 A
  • Filed: 12/18/1975
  • Issued: 04/12/1977
  • Est. Priority Date: 01/20/1975
  • Status: Expired due to Term
First Claim
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1. An improved fluorescent lamp comprising:

  • an evacuable, light-transmissive envelope having a substantially globular upper shell;

    a closed loop magnetic core contained within said envelope;

    means for energizing said core with a radio frequency magnetic field;

    a gaseous medium within said envelope adapted to sustain an electric discharge due to an electric field induced therein by said magnetic core and to emit radiation at a first wavelength when sustaining said discharge; and

    a luminescent phosphor at least on the interior of said envelope adapted to emit visible light when excited by said first wavelength radiation.

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