Patents by Inventor Samuel E. Bigbie

Samuel E. Bigbie 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).

  • Print head motor control system using analog and digital feedback
    Patent number: 4490796
    Abstract: A control system for a bidirectional printer having a print head carriage movable at different speeds on different printing lines employs a microcomputer which generates a desired velocity profile for the carriage motion. This desired velocity profile is continuously compared with the actual velocity and the error voltage generated is used to control pulse width modulator circuitry which supplies driving power to carriage drive motor.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: December 25, 1984
    Assignee: International Business Machines Corporation
    Inventors: Samuel E. Bigbie, Barry R. Cavill, David F. Dodgen, Albert A. Nawy
  • Printer control system with error count averaging
    Patent number: 4459675
    Abstract: In a control system for a bidirectional printer capable of printing at different speeds on different lines and in which the actual velocity of the print carriage is compared with a desired velocity profile to generate an error count, the error count is measured and averaged out for each direction and speed of carriage movement to compensate for the effect of changes in the printer system dynamics such as aging, wear, debris buildup, etc.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: July 10, 1984
    Assignee: International Business Machines Corporation
    Inventors: John E. Bateson, Samuel E. Bigbie, Barry R. Cavill, Albert A. Nawy