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Control circuitry

  • US 4,800,290 A
  • Filed: 11/18/1987
  • Issued: 01/24/1989
  • Est. Priority Date: 11/18/1987
  • Status: Expired due to Fees
First Claim
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1. Control circuitry comprising:

  • a first voltage source for supplying a first voltage V1;

    a second voltage source for supplying a second voltage V2;

    a first circuit comprising an energizable means and a first diode arrangement connected in series therewith across said first and second voltage sources;

    a second circuit comprising a second energizable means and a second diode arrangement connected in series therewith across said first and second voltage sources;

    said first and second voltages being arranged so that V1-V2 is greater than a first value, said first diode arrangement becomes conductive and said first energizable means is energized and, when V1-V2, is less than a second value, said second diode arrangement is conductive and said second energizable means is energized.

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