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Short-arc discharge lamp with starting device

  • US 4,053,809 A
  • Filed: 06/18/1976
  • Issued: 10/11/1977
  • Est. Priority Date: 06/18/1976
  • Status: Expired due to Term
First Claim
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1. An arc discharge lamp comprising an envelope having a bulb portion and an elongated stem extending from said bulb portion, and first and second electrodes extending into said envelope and spaced apart therein in said bulb portion to define an arc discharge path, said first electrode being part of an elongated electrode structure hermetically sealed in said stem at a region thereof spaced from said bulb portion, said first electrode extending through said stem from said seal region and into said bulb portion, wherein the improvement comprises a starting device of electrically conductive material positioned externally of said envelope and connected electrically to said second electrode and extending from said second electrode to and fitting around and substantially encircling said stem alongside said first electrode between said seal region and said bulb portion.

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