Patents Represented by Law Firm Vaden, Eickenrohkt, Thompson & Boulware
  • High intensity discharge lamp self-adjusting ballast system sensitive to the radiant energy or heat of the lamp
    Patent number: 4682084
    Abstract: A self-adjusting ballast system for a high intensity discharge lamp. A lightweight, inexpensive and efficient ballast controls the strike and warmup stages of the high intensity discharge lamp, in particular high wattage lamps, through direct sensing of the radiant energy or heat output of the lamp itself. A current controller corrects for current imbalance in the alternating current lamp circuit due to bulb rectification or magnetic imbalance in the inverter transformer system.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: July 21, 1987
    Assignee: Innovative Controls, Incorporated
    Inventors: Donald S. Kuhnel, Sidney A. Ottenstein