Patents by Inventor William Harold Castle

William Harold Castle 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).

  • Selectable dual ratchet feed for a printer platen
    Patent number: 4064985
    Abstract: A line feed ratchet arrangement is disclosed which allows selectability between two different line feeds such as the 5 1/3 lines per inch and six lines per inch and utilizes a drive pawl arrangement having two pawls driven identically. The drive ratchets are selectively engaged by coaxial shifting of a drive member in response to operator movement of a selector knob or similar control.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: December 27, 1977
    Assignee: International Business Machines Corporation
    Inventors: William Harold Castle, William Ray Crowe, James Lester Herriford