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CONTROL CIRCUIT FOR STARTING, SUSTAINING AND OPERATING ARC LAMPS

  • US 3,699,385 A
  • Filed: 12/30/1970
  • Issued: 10/17/1972
  • Est. Priority Date: 12/30/1970
  • Status: Expired due to Term
First Claim
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1. A control circuit for starting, sustaining and operating an arc lamp from a source of alternating current comprising, in combination, a ballast transformer having input means for connection to said source of alternating current and output means for connecting said arc lamp in a lamp operating circuit loop, differentiating circuit means coupled across the output means of said ballast transformer for detecting a voltage transition in said lamp operating circuit loop and generating a trigger signal in response thereto, and means coupled to said lamp operating circuit loop and responsive to said trigger signal for introducing a voltage pulse of sufficient energy to ignite said arc lamp.

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