Patents by Inventor Hendrikus M. W. Goossens

Hendrikus M. W. Goossens 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).

  • Hybrid ballast for high pressure discharge lamp
    Patent number: 5589739
    Abstract: A circuit for operating a discharge lamp includes input terminals for connection to a supply voltage source and a first apparatus coupled to the input terminals for generating a low-frequency alternating current from a supply voltage delivered by the supply voltage source. A second apparatus is coupled to the input terminals for generating from the supply voltage a further current which is superimposed on the low-frequency alternating current. The polarity of the further current is the same as that of the low-frequency alternating current. As a result, instabilities do not arise in the discharge arc of a high-pressure discharge lamp operated by the circuit.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: December 31, 1996
    Assignee: U.S. Philips Corporation
    Inventor: Hendrikus M. W. Goossens