Patents by Inventor James R. Harper

James R. Harper 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).

  • Signal adapter
    Patent number: 7319191
    Abstract: A signal adapter comprising an explosion proof housing, a circuit member disposed on an inside of the explosion proof housing, a signal input connector electrically connected to the circuit member, a signal output connector electrically connected to the circuit member, and a seal disposed on the inside of the explosion proof housing and around the circuit member, creating an explosion proof seal between the signal input connector and the signal output connector.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: January 15, 2008
    Assignee: Thermo Fisher Scientific Inc.
    Inventors: King L. Poon, James R. Harper
  • Signal adapter
    Publication number: 20030083038
    Abstract: A signal adapter comprising an explosion proof housing, a circuit member disposed on an inside of the explosion proof housing, a signal input connector electrically connected to the circuit member, a signal output connector electrically connected to the circuit member, and a seal disposed on the inside of the explosion proof housing and around the circuit member, creating an explosion proof seal between the signal input connector and the signal output connector.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 1, 2003
    Inventors: King L. Poon, James R. Harper
  • Adjustable drive system for matching surface speeds of a transfer roll and plate roll and method thereof
    Patent number: 4428288
    Abstract: A variable speed flexographic printer with means to match surface speeds of an ink transfer roll with the associated plate roll. A tachometer measures the rotational speed of a plate roll providing a variable DC input through means which adjust said input proportional to the diameters of the plate and ink transfer rolls providing a proportional variable DC signal to a variable speed DC motor driving the ink transfer roll. A wiper and metering blade is mounted to a block adjustably movable to and from the ink roll depending upon the diameter thereof.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: January 31, 1984
    Assignee: Harper Corporation of America
    Inventors: James R. Harper, Charles L. O'Klatner
  • Adjustable drive system for matching surface speeds of a transfer roll and plate roll and method thereof
    Patent number: 4424744
    Abstract: A variable speed flexographic printer with means to match surface speeds of an ink transfer roll with the associated plate roll. A tachometer measures the rotational speed of a plate roll providing a variable DC input through means which adjust said input proportional to the diameters of the plate and ink transfer rolls providing a proportional variable DC signal to a variable speed DC motor driving the ink transfer roll. A wiper and metering blade is mounted to a block adjustably movable to and from the ink roll depending upon the diameter thereof.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: January 10, 1984
    Assignee: Harper Corporation of America
    Inventors: James R. Harper, Charles L. O'Klatner