Patents by Inventor Keith Philip Parker

Keith Philip Parker 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).

  • Converter for a DC power supply having a input resistance in series with a DC regulatory circuit
    Patent number: 6140804
    Abstract: A converter is provided for stepping-down a DC power input to produce a DC power output of lower voltage. The converter includes a regulating unit (3), and, in series with it, an input resistor (4). In use, the resistor (4) is separated from the regulating unit (3) and is mounted on a body of a piece of machinery, so that heat produced within the resistor is transmitted to that machinery, and does not interfere with the operation of the regulating unit (3). The regulating unit (3) employs a linear conversion circuit which produces a stable (DC) output but, unlike conventional DC-DC converters, generates substantially no stray electromagnetic fields.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: October 31, 2000
    Assignee: Autotronics Engineering International Limited
    Inventor: Keith Philip Parker
  • Converter for a DC power supply having an input resistance in series with a DC regulating circuit
    Patent number: 6014019
    Abstract: A converter is provided for stepping-down a DC power input to produce a DC power output of lower voltage. The converter includes a regulating unit (3), and in series with it an input resistor (4). In use, the resistor (4) is separated from the regulating unit (3) and is mounted on a body of a piece of machinery, so that heat produced within the resistor is transmitted to that machinery, and does not interfere with the operation of the regulating unit (3). The regulating unit (3) employs a linear conversion circuit which produces a stable (DC) output but, unlike conventional DC-DC converters, generates substantially no stray electromagnetic fields.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: January 11, 2000
    Assignee: Autotronics Engineering International Ltd
    Inventor: Keith Philip Parker