Patents by Inventor Jacob F. Michael

Jacob F. Michael 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).

  • Resistor-aided starting of metal halide lamps
    Patent number: 4258288
    Abstract: A metal halide high-intensity discharge lamp for connection to a constant wattage-type mercury ballast including a transformer having a secondary winding having a capacitor in series circuit arrangement therewith. The lamp includes starting aid means and warm-up assistance means to ensure reliable operation. The starting aid means is a voltage doubler comprising a diode and two resistors operating in conjunction with the ballast capacitor and also including a normally closed heat-responsive switch means operative to prevent voltage stress on the diode after the lamp starts.
    Type: Grant
    Filed: May 9, 1979
    Date of Patent: March 24, 1981
    Assignee: Westinghouse Electric Corp.
    Inventors: Jacob F. Michael, Daniel A. Larson
  • Metal halide lamp for operation with a mercury ballast
    Patent number: 4258289
    Abstract: A metal halide high-intensity discharge lamp for connection to a constant wattage-type ballast including a transformer with a secondary having a capacitor connected in series circuit arrangement therewith. The lamp includes starting aid means including a voltage doubler comprising a diode and two resistors operating in conjunction with the ballast capacitor. The starting aid means further comprises a normally closed heat-responsive switch means operative to prevent voltage stress on the diode after the lamp starts.
    Type: Grant
    Filed: May 9, 1979
    Date of Patent: March 24, 1981
    Assignee: Westinghouse Electric Corp.
    Inventor: Jacob F. Michael