Patents by Inventor Raymond A. Vos

Raymond A. Vos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ballast circuits for gas discharge lamps
    Patent number: 5134344
    Abstract: A ballast circuit includes a load circuit. A reservoir capacitor is effective to supply charge to the load circuit. A capacitive charge pump circuit is effective to transfer charge from a charge pump capacitive circuit to the load circuit and to the reservoir capacitor. The load circuit includes the primary winding of a transformer. A secondary winding of this transformer is for connection across a discharge lamp. In operation of the ballast circuit, the primary winding of the transformer drives the capacitive charge pump circuit.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: July 28, 1992
    Assignee: Thorn Emi plc
    Inventors: Raymond A. Vos, Francis Moll
  • Ballast circuits for discharge lamps
    Patent number: 5117157
    Abstract: A ballast circuit for the operation of a discharge lamp includes a bridge rectifier. A capacitive energy storage device and a load circuit are connected in series across the bridge rectifier. A charge circuit provides charge to the capacitive energy storage from the load circuit in a potential so as to add to the potential from the outlet of the bridge rectifier.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: May 26, 1992
    Assignee: Thorn EMI plc
    Inventor: Raymond A. Vos