Patents by Inventor Jacek Cachel

Jacek Cachel 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).

  • Electronic ballast having open circuit in output
    Patent number: 6720741
    Abstract: Gas discharge lamps may conduct current from the common rail to earthen ground through a fixture containing the lamps. A transistor is coupled in series in the current path to the common rail. When the ballast is placed in a quiescent state, the transistor is rendered non-conducting, thereby solating the lamps from the common rail and preventing flicker. In accordance with another aspect of the invention, the control electrode of the transistor is coupled to a source of low voltage and the transistor is rendered non-conducting when the source of low voltage is turned off. The lamps can also be isolated from the common rail by using a semiconductor switch in the rectifier section or by referencing the output of the inverter to the high voltage rail.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: April 13, 2004
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Kent E. Crouse, Gueorgui L. Grouev, William L. Keith, Jacek Cachel
  • Electronic ballast having open circuit in output
    Publication number: 20030146716
    Abstract: Gas discharge lamps may conduct current from the common rail to earthen ground through a fixture containing the lamps. A transistor is coupled in series in the current path to the common rail. When the ballast is placed in a quiescent state, the transistor is rendered non-conducting, thereby solating the lamps from the common rail and preventing flicker. In accordance with another aspect of the invention, the control electrode of the transistor is coupled to a source of low voltage and the transistor is rendered non-conducting when the source of low voltage is turned off. The lamps can also be isolated from the common rail by using a semiconductor switch in the rectifier section or by referencing the output of the inverter to the high voltage rail.
    Type: Application
    Filed: February 1, 2002
    Publication date: August 7, 2003
    Applicant: Energy Savings, Inc.
    Inventors: Kent E. Crouse, Gueorgui L. Grouev, William L. Keith, Jacek Cachel