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High intensity discharge lamp with ignition aid

  • US 8,766,518 B2
  • Filed: 07/08/2011
  • Issued: 07/01/2014
  • Est. Priority Date: 07/08/2011
  • Status: Expired due to Fees
First Claim
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1. A high intensity discharge lamp comprising:

  • an electrically insulating arc tube comprised of light transmissive material having a central portion and two legs each of which extends from said central portion, said central portion forming an interior discharge region;

    electrical conductors each extending through one of said legs and being spaced apart from each other in said discharge region;

    a sealed shroud comprised of light transmissive material enclosing said arc tube and electrical connection to said electrical conductors through said sealed shroud;

    an electrically conductive frame member disposed in an interior of said shroud that is electrically connected to one of said electrical conductors;

    an ignition aid comprising electrically conductive foil that is fastened to said frame member and forms a closed loop that encircles one of said legs of said arc tube around one of said electrical conductors, wherein said foil encircles said leg by a range of at least 270 degrees to 360 degrees; and

    wherein said foil includes two end portions, and a central portion therebetween that encircles said arc tube leg, a first said end portion of said foil being connected to said frame member and a second said end portion of said foil being connected to said foil between said central portion and said first end portion of said foil.

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