Patents by Inventor Jean Douville

Jean Douville 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).

  • High voltage measuring circuit coupled to the capacitive grounding tap bushing of an HV device
    Patent number: 4914382
    Abstract: A high voltage measuring circuit for broadband measurement of transient signals occurring in high voltage apparatus. The measuring circuit is housed in a shielded housing having an input sensing circuit for connection to a capacitive grounded tap of the high voltage apparatus. The sensing circuit is connected to an output circuit through an electrical shielded connection. The measuring circuit generates output signals which are replicas of the transient signals appearing on the bushing of the high voltage apparatus. The broadband of the measuring circuit extends over a frequency range of from about 1 Hz to 1 MHz and has a signal level higher than background noise.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: April 3, 1990
    Assignee: Hydro-Quebec
    Inventors: Jean Douville, Ryszard Malewski, Louis Lavallee