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Self-luminous light source

  • US 4,546,417 A
  • Filed: 07/19/1983
  • Issued: 10/08/1985
  • Est. Priority Date: 07/19/1983
  • Status: Expired due to Fees
First Claim
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1. A self-luminous light source comprising:

  • inner and outer glass tubes of substantially equal length, placed within one another to define an elongated axial space within the inner tube and an elongated annular space between the inner and outer glass tubes;

    annular glass end members extending between the inner and outer glass tubes at opposite ends thereof, the end members and coaxial tubes entirely closing the elongated annular space;

    a phosphor coating on at least one surface of the inner and outer tubes; and

    ,a radioactive gas disposed in the elongated annular space.

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