Patents by Inventor Michael K. Webb

Michael K. Webb 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).

  • Power control circuit for printers and other devices
    Patent number: 6908164
    Abstract: A power control circuit is connected between a power source and an electronic controller in a device such as a printer and includes a latchable power delivery state for delivering power to an electronic controller of the device. Temporary closure of a switch latches the power control circuit in its power delivery state. The electronic controller subsequently detects temporary closure of the switch and responds with an output signal that unlatches the power control circuit into a power non-delivery state. The power control circuit may include an associated kick-start circuit portion for causing the power control circuit to latch into its power delivery state in response to initial application of power by the power source.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: June 21, 2005
    Assignee: Lexmark International, Inc.
    Inventors: Hugh E. Gilbert, Marvin Nicholson, III, Ricky E. Robbins, Michael K. Webb
  • Power control circuit for printers and other devices
    Publication number: 20040135834
    Abstract: A power control circuit is connected between a power source and an electronic controller in a device such as a printer and includes a latchable power delivery state for delivering power to an electronic controller of the device. Temporary closure of a switch latches the power control circuit in its power delivery state. The electronic controller subsequently detects temporary closure of the switch and responds with an output signal that unlatches the power control circuit into a power non-delivery state. The power control circuit may include an associated kick-start circuit portion for causing the power control circuit to latch into its power delivery state in response to initial application of power by the power source.
    Type: Application
    Filed: January 13, 2003
    Publication date: July 15, 2004
    Inventors: Hugh E. Gilbert, Marvin Nicholson, Ricky E. Robbins, Michael K. Webb
  • Method and apparatus for machine specific overcurrent detection
    Patent number: 6758547
    Abstract: The invention is drawn to a test circuit for an ink jet printer which measures the voltage decay over time. Specifically, the test circuit utilizes a known resistor connected to the power source (voltage) and the printer. The printer functions as a capacitor to complete the test circuit as an RC circuit. After isolating the power source from the test circuit, the voltage decay is monitored to indicate the presence of a short circuit.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: July 6, 2004
    Assignee: Lexmark International, Inc.
    Inventors: Adam J. Ahne, Ricky E. Robbins, Michael K. Webb
  • Method and apparatus for machine specific overcurrent detection
    Publication number: 20040008233
    Abstract: The invention is drawn to a test circuit for an ink jet printer which measures the voltage decay over time. Specifically, the test circuit utilizes a known resistor connected to the power source (voltage) and the printer. The printer functions as a capacitor to complete the test circuit as an RC circuit. After isolating the power source from the test circuit, the voltage decay is monitored to indicate the presence of a short circuit.
    Type: Application
    Filed: July 10, 2002
    Publication date: January 15, 2004
    Inventors: Adam J. Ahne, Ricky E. Robbins, Michael K. Webb