Patents by Inventor Thomas W. Efford

Thomas W. Efford 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).

  • Patent number: 5673168
    Abstract: A capacitor structure for dissipating heat, for example, generated by high ripple currents. The capacitor includes an outer casing of substantially annular cross section comprising an outer side wall, a bottom and an interior tube integrally formed from a substantially continuous piece of thermally conductive material. A capacitor winding of substantially annular cross section is disposed within the outer casing which is sealed at a top. The capacitor winding may be in close thermal contact with the inner tube, the bottom and the outer side wall to improve heat dissipation.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: September 30, 1997
    Assignee: United Chemi-Con Manufacturing
    Inventors: Thomas W. Efford, Gary J. Buczkowski, Mitchell D. Weaver
  • Patent number: 4803598
    Abstract: A plurality of electrolytic capacitor sections are sealed within a common cube-like case. An internal wall divides the case into isolated chambers. Upon sealing of the case, the assembly takes up substantially no more space on a circuit board than an individual capacitor of the prior art. Each capacitor chamber has its own vent located in the case at the junction of a side wall (parallel to the internal wall) and the top wall by means of a bevel which reduces the walls to the desired vent thickness.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: February 7, 1989
    Assignee: Sprague Electric Company
    Inventors: Thomas W. Efford, Lester C. Dain
  • Patent number: 4547829
    Abstract: A capacitor assembly has a wound and flattened non-extended foil capacitor section with at least one electrode tab connected to each electrode and is enclosed in a case having an insulating cover and an insulating base. Conductive members are secured to said base by conductive means which extend through the members and the base; one end of each conductive means is covered by a folded portion of the conductive member and welded. The electrode tabs are attached by welding to a side portion of the conductive member.
    Type: Grant
    Filed: May 30, 1984
    Date of Patent: October 15, 1985
    Assignee: Sprague Electric Company
    Inventors: Thomas W. Efford, Joseph A. Moresi, Jr.