Patents by Inventor Jerry J. Kral

Jerry J. Kral 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).

  • Detection of faults in the insulation of an electrical conductor using a liquid electrolyte
    Patent number: 4240026
    Abstract: Faults, such as pinholes, in the insulation of an electrical conductor are detected by passing the conductor through a liquid electrolyte which acts as a liquid electrode. A regulated DC supply is connected to the electrolyte, the conductor core grounded, and the DC bias to the electrolyte monitored. Any variation in the DC bias, is detected and for any change over a predetermined minimum value a signal is produced, which can be used to actuate a marker or stop the line. More than one conductor can pass together, for example twisted pairs or quads as used for telecommunications.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: December 16, 1980
    Assignee: Northern Telecom Limited
    Inventors: Peter Murphy, Yvon O. Dionne, Jerry J. Kral, John Stefaniszyn