Patents by Inventor Robert L. Foisy

Robert L. Foisy 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: 5053927
    Abstract: A pocket within the molded casing of a solid electrolyte capacitor is of greater volume than a fuze passing through the pocket, thereby ensuring that the fuze will not reestablish its conductive path after being blown. The pocket is established between layers of polyester tape that insulate the cathode of the capacitor from its leadframe and protect the fuze from the molding material.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: October 1, 1991
    Assignee: Sprague Electric Company
    Inventors: Richard D. Baker, Robert L. Foisy
  • Patent number: 5011067
    Abstract: A standard tinned nickel-iron alloy lead frame has a plurality of pairs of extending tab portion positioned in a straight row. A long straight piece of an exothermically alloyable fuse wire, with a core of aluminum coaxially clad with palladium in approximately equal volumes, is held in contact with the plurality of pairs of lead frame tabs. Heat is applied to the fuse strand at two points; namely, on one and the other sides of each pair of tabs initiating progressive alloying in two directions from each heated point. When the progressive alloying and melting of the fuse strand reaches a tab, the tab is heated and heat sinks the fuse strand to stop the progressive alloying and melting. There is simultaneously formed a metallurgical bond between the ends of each remaining elemental fuse strand, respectively, and each of the pair of tabs that are bridged by that remaining elemental strand.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: April 30, 1991
    Assignee: Sprague Electric Company
    Inventor: Robert L. Foisy