Patents by Inventor Lester C. Dain

Lester C. Dain 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).

  • Metal-cased electrolytic capacitor
    Patent number: 4987518
    Abstract: A wound electrolytic capacitance section is housing within a metal can having a plurality of circumferential indentations or ribs. The uppermost rib provides a seat for the capacitor cover. The lowermost rib determines the depth to which the section extends into the can and provides bottom support for the section. At least one intermediate rib provides lateral support for the section and prevents its lateral movement.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: January 22, 1991
    Assignee: Sprague Electric Company
    Inventor: Lester C. Dain
  • Electrolytic capacitor assembly
    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
  • Capacitor with mounting ring
    Patent number: 4802064
    Abstract: A mounting ring is secured in the mouth end of a capacitor casing by being engaged under the rolled-over rim of the fully sealed capacitor.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: January 31, 1989
    Assignees: Sprague Electric Company, Universal Products, Inc.
    Inventors: Lester C. Dain, Steven A. Rubin