Patents by Inventor Dario A. Cardona

Dario A. Cardona 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 switch having improved reliability electrical contacts and electrical contacts therefor
    Patent number: 6191375
    Abstract: An electrical switch (10) has a contact system in which first and second contact protrusions (22a, 22b; 22a′, 22b′; 22a″, 22b″) are offset from the center line of the long axis of a twistable movable contact arm. In a preferred embodiment the movable contact (22) is formed with a groove (22e, 22e′) formed through the contact running generally along the center line to form first and second generally wedge shaped contacts on either side of the center line. In one preferred embodiment, converging surfaces (22f, 22g) form a groove with an angle alpha of approximately 125° and approximately 158° in another preferred embodiment. In another preferred embodiment the protrusions (22a″, 22b″) are generally hemispherical.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: February 20, 2001
    Assignee: Texas Instruments Incorporated
    Inventors: Dario A. Cardona, Louis J. Leyes