Patents by Inventor Roy V. Twining

Roy V. Twining 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).

  • Integrated non-contact molten metal level sensor and controller
    Patent number: 5339885
    Abstract: A metal casting control device is provided for use in conjunction with a semi-continuous metal casting system. The control device is an integral module containing a metal surface elevation sensing device, a valve actuator for positioning a metal distribution control valve, and electronic circuits associated with these mechanical components. The control device module is adapted to be connected to an overhead metal distribution launder by a single quick-coupling for convenient and simple removal and replacement. Calibration of the control device is performed after installation by mounting a calibration target on the metal casting system and vertically adjusting the metal surface elevation sensing device until an integral calibration indicator positioned on the control device indicates that the proper vertical position has been attained.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: August 23, 1994
    Assignee: Wagstaff Inc.
    Inventors: A. David Sinden, Hans Fischer, Roy V. Twining