Patents by Inventor John W. Vrablec

John W. Vrablec 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).

  • Electrical yoke tester
    Patent number: 5296818
    Abstract: A tester is provided for a control yoke of an oil-filled electrical power switch. The tester can be easily and safely used by a line crew member. The tester is connected to the yoke which carries electrical signals to control the position of the switch. Control signals are then furnished to the yoke in the usual manner. Indicators on the tester identify whether the yoke or the switch is the source of the problem.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: March 22, 1994
    Assignee: Houston Industries Incorporated
    Inventor: John W. Vrablec