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Ignitor circuit for discharge lamps with novel ballast

  • US 5,017,840 A
  • Filed: 05/07/1990
  • Issued: 05/21/1991
  • Est. Priority Date: 12/16/1987
  • Status: Expired due to Term
First Claim
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1. A starting and operating circuit for a discharge lamp including a ballast reactance, said ballast reactance having a body including a coil with first, second and third coil segment means, each with a number of windings, at least one of said first and second coil segment means having a substantial number of more windings than said third coil segment means, each coil segment means with two ends, said third coil segment means being electrically connected between said first coil segment means and said second coil segment means and forming electrical connections therewith regardless of the physical location of said third coil segment means on said coil relative to the physical locations of said first and second coil segment means and also comprising a discharge lamp with two terminal means, one terminal means connected to one end of said second coil segment means and the other terminal means for connection to an AC power supply return, a voltage sensitive switching means with two ends, one end connected to the electrical connection between said first and third coil segment means and a capacitor with two ends, one end of said capacitor connected to the electrical connection between said second and third coil segment means, a resistor with two ends, one end of said resistor connected to the other ends of said voltage sensitive switching means and said capacitor, said resistor having its other end for connection to said AC power supply return and packaging means integral with the body of said reactance for packaging said voltage sensitive switching means, said capacitor and said resistor with said body as an integrated unit.

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