Patents by Inventor Timothy W. Crocket

Timothy W. Crocket 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).

  • Fault detection circuit for printers with multiple print heads
    Patent number: 7547087
    Abstract: A fault detector apparatus for a printer having a first print head and a second print head with a plurality of print head elements in each print head is disclosed. The apparatus includes a test circuit in signal communication with all the print heads to test the plurality of print head elements. The test circuit includes a test power supply for generating a test voltage, a first resistor, a second resistor, and an analog to digital converter in signal communication with the second resistor. The first resistor is in series connection between the test power supply and the plurality of elements in the first print head. The second resistor in series connection with the test power supply, the first resistor, and the plurality of elements in the second print head. The fault detector apparatus will also work for a printer with only one print head.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: June 16, 2009
    Assignee: International Business Machines Corporation
    Inventors: Robert T. Cato, Timothy W. Crocket, Charles R. Kirk
  • FAULT DETECTION CIRCUIT FOR PRINTERS WITH MULTIPLE PRINT HEADS
    Publication number: 20080204035
    Abstract: A fault detector apparatus for a printer having a first print head and a second print head with a plurality of print head elements in each print head is disclosed. The apparatus includes a test circuit in signal communication with all the print heads to test the plurality of print head elements. The test circuit includes a test power supply for generating a test voltage, a first resistor, a second resistor, and an analog to digital converter in signal communication with the second resistor. The first resistor is in series connection between the test power supply and the plurality of elements in the first print head. The second resistor in series connection with the test power supply, the first resistor, and the plurality of elements in the second print head. The fault detector apparatus will also work for a printer with only one print head.
    Type: Application
    Filed: February 23, 2007
    Publication date: August 28, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert T. Cato, Timothy W. Crocket, Charles R. Kirk