Patents Assigned to Magnetek Universal Mfg. Co.
  • Filment switch for a lamp ballast
    Patent number: 5132595
    Abstract: A filament switch for a rapid start fluorescent lamp disconnects or reduces through phase modulation the heating current to a plurality of lamp filaments to save power. The switch uses a trigger in series with a voltage sensitive element and an impedance element, the switch being responsive to the difference between a lamp starting voltage and a lamp sustaining voltage for determining when and for how long the filaments are heated.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: July 21, 1992
    Assignee: Magnetek Universal Mfg. Co.
    Inventors: Robert A. Kulka, Frederick P. Bauer