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Gas discharge lamp, in particular for motor-vehicle headlights

  • US 6,445,129 B1
  • Filed: 03/04/1999
  • Issued: 09/03/2002
  • Est. Priority Date: 03/16/1996
  • Status: Expired due to Fees
First Claim
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1. A gaseous-discharge lamp for use in a motor-vehicle headlamp, comprising:

  • a burner vessel formed of a glass and containing a gas;

    a first gas-tight electrode bushing;

    a first main electrode extending into the burner vessel via the first gas-tight electrode bushing;

    a second gas-tight electrode bushing;

    a second main electrode extending into the burner vessel via the second gas-tight electrode bushing, an arc gap along which an electric arc develops during operation being formed between an end region of the first main electrode and an end region of the second main electrode; and

    an arrangement for producing, as an ignition gap that is spatially separated from the arc gap, at least one of a creepage spark gap along an inner wall of the burner vessel and a spark gap shorter than the arc gap, the arrangement for producing the creepage spark gap includes at least one ignition electrode, the at least one ignition electrode being arranged inside the burner vessel;

    wherein the burner vessel includes;

    a combustion chamber, a first tubular extension extending from the combustion chamber along a first direction and containing the first main electrode, the first tubular extension including an end region containing the first gas-tight electrode bushing, and a second tubular extension extending from the combustion chamber along a second direction that is opposite to the first direction and containing the second main electrode, the second tubular extension including an end region containing the second gas-tight electrode bushing, wherein the at least on e ignition electrode is coupled to one of the first main electrode and the second main electrode and extends up to a location situated near and being underneath another one of the first main electrode and the second main electrode in an operating state, and wherein the at least one ignition electrode corresponds to one of a rod-type side arm and a wire-type side arm of one of the first main electrode and the second main electrode.

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