Patents by Inventor Robert D. Ball

Robert D. Ball 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).

  • Electric circuit interrupting apparatus
    Patent number: 4412202
    Abstract: An electric circuit interrupter arranged to interrupt overload currents and having a pair of relatively movable normally closed disconnect contacts is associated with an electric circuit interrupter arranged to interrupt load currents and having a pair of relatively movable normally closed contacts forming a parallel circuit to the disconnect contacts only during opening of said disconnect contacts so as to prevent arcing at said disconnect contacts during opening thereof.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: October 25, 1983
    Assignee: Kearney-National, Inc.
    Inventors: William H. Russell, Robert D. Ball
  • Electric connector apparatus and method
    Patent number: 3989341
    Abstract: An electric terminal bushing having a hollow tubular contact engageable with the contact pin of an electric elbow type connector is arranged so as substantially to reduce the arcing time during a switch closing operation and includes means for slidably mounting the hollow tubular contact within the bushing between normal and interim positions, and spring means arranged to move said contact toward its normal position following movement of said contact toward its interim position during a circuit closing operation.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: November 2, 1976
    Assignee: Kearney-National, Inc.
    Inventor: Robert D. Ball