Patents by Inventor John Barry Link

John Barry Link 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).

  • Method and apparatus for detecting faults in buried insulated conductors
    Patent number: 4039938
    Abstract: An electrical leakage path fault in the insulation of a buried conductor is located by applying, between the conductor and earth, an alternating signal which is then sensed at locations along the path of the conductor. The alternating signal is started at substantially the same phase angle at least once during each interval when it is being sensed. The sensed signal is rectified and divided by two to produce a reference signal which is phase compared with the sensed signal to trace the conductor to the fault.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: August 2, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: John Barry Link