Patents by Inventor Allen M. Barnwell

Allen M. Barnwell 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).

  • Helical inductor for power lines and the like
    Patent number: 3991394
    Abstract: Current distribution between parallel-connected, coaxial, helical coils is determined by rectangular conductors having a selected radial thickness and longitudinal widths so that each coil carries the desired current. First adjacent ends of all of the coils are connected together at the same physical location by a first common terminal, and second adjacent ends of all of the coils are connected together at the same physical location by a second common terminal. The rectangular conductors facilitate winding and supporting coaxial coils, and different conductor widths and winding pitches permit each coil to be designed so that it has the desired characteristics and importantly so that it carries the desired current.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: November 9, 1976
    Assignee: General Electric Company
    Inventors: Allen M. Barnwell, Wiley C. Smith, Jr.