Patents by Inventor James C. Marsden

James C. Marsden 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).

  • Electronic circuit for the detection and analysis of normal zones in a superconducting coil
    Patent number: 4375659
    Abstract: A method of detecting and analyzing normal zones in a superconducting coil which involves generating a signal representative of the real power dissipated within the superconducting coil after the background noise and transient conditions within the coil have been accounted for. The power signal is integrated with respect to time to provide a signal proportional to the total energy dissipated within the superconductor which is then compared against a critical reference signal so that a quench signal is generated to immediately disconnect the superconducting coil when the reference signal is exceeded and to allow the coil to discharge its energy into an external device to prevent coil damage. An exemplary circuit for implementing the method is disclosed.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: March 1, 1983
    Assignee: General Dynamics Corporation/Convair Div.
    Inventors: Steven M. Cunningham, James C. Marsden, Hubert G. Arrendale, Jr.