Patents by Inventor John Wesley Griffith

John Wesley Griffith 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).

  • Generator magnetic armature wedge
    Patent number: 6683398
    Abstract: A magnetic armature wedge is provided for replacing conventional dovetail wedges in high-powered large-size turbine generators. The magnetic armature wedges that are used for supporting the armature bars are made by molding resin, e.g., epoxy with ferromagnetic particles, wires, laminates and the like embedded therewithin. The magnetic particles, wires, laminates and the like increase the magnetic permeability of the wedges causing higher slot flux leakage and high generator subtransient reactants.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: January 27, 2004
    Assignee: General Electric Company
    Inventors: Wei Tong, Frederick John Rink, Jr., James Michael Fogarty, John Wesley Griffith, Christian Lee Vandervort
  • Method for increasing subtransient reactance of a generator
    Patent number: 6674209
    Abstract: A magnetic armature wedge is provided for replacing conventional dovetail wedges in high-powered large-size turbine generators. The magnetic armature wedges that are used for supporting the armature bars are made by molding resin, e.g., epoxy with ferromagnetic particles, wires, laminates and the like embedded therewithin. The magnetic particles, wires, laminates and the like increase the magnetic permeability of the wedges causing higher slot flux leakage and high generator subtransient reactants.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: January 6, 2004
    Assignee: General Electric Company
    Inventors: Wei Tong, Frederick John Rink, Jr., James Michael Fogarty, John Wesley Griffith, Christian Lee Vandervort
  • Generator stator core vent duct spacer posts
    Patent number: 6583526
    Abstract: Generator stator cores are constructed by stacking many layers of magnetic laminations. Ventilation ducts may be inserted between these layers by inserting spacers into the core stack. The ventilation ducts allow for the passage of cooling gas through the core during operation. The spacers or spacer posts are positioned between groups of the magnetic laminations to define the ventilation ducts. The spacer posts are secured with longitudinal axes thereof substantially parallel to the core axis. With this structure, core tightness can be assured while maximizing ventilation duct cross section for gas flow and minimizing magnetic loss in the spacers.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: June 24, 2003
    Assignee: General Electric Company
    Inventors: John Wesley Griffith, Wei Tong
  • GENERATOR STATOR CORE VENT DUCT SPACER POSTS
    Publication number: 20030048030
    Abstract: Generator stator cores are constructed by stacking many layers of magnetic laminations. Ventilation ducts may be inserted between these layers by inserting spacers into the core stack. The ventilation ducts allow for the passage of cooling gas through the core during operation. The spacers or spacer posts are positioned between groups of the magnetic laminations to define the ventilation ducts. The spacer posts are secured with longitudinal axes thereof substantially parallel to the core axis. With this structure, core tightness can be assured while maximizing ventilation duct cross section for gas flow and minimizing magnetic loss in the spacers.
    Type: Application
    Filed: October 19, 1999
    Publication date: March 13, 2003
    Inventors: John Wesley Griffith, Wei Tong
  • Method for increasing subtransient reactance of a generator
    Publication number: 20020121830
    Abstract: A magnetic armature wedge is provided for replacing conventional dovetail wedges in high-powered large-size turbine generators. The magnetic armature wedges that are used for supporting the armature bars are made by molding resin, e.g., epoxy with ferromagnetic particles, wires, laminates and the like embedded therewithin. The magnetic particles, wires, laminates and the like increase the magnetic permeability of the wedges causing higher slot flux leakage and high generator subtransient reactants.
    Type: Application
    Filed: March 20, 2002
    Publication date: September 5, 2002
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Wei Tong, Frederick John Rink, James Michael Fogarty, John Wesley Griffith, Christian Lee Vandervort
  • Generator magnetic armature wedge and method for increasing subtransient reactance of a generator
    Publication number: 20020096960
    Abstract: A magnetic armature wedge is provided for replacing conventional dovetail wedges in high-powered large-size turbine generators. The magnetic armature wedges that are used for supporting the armature bars are made by molding resin, e.g., epoxy with ferromagnetic particles, wires, laminates and the like embedded therewithin. The magnetic particles, wires, laminates and the like increase the magnetic permeability of the wedges causing higher slot flux leakage and high generator subtransient reactants.
    Type: Application
    Filed: December 1, 2000
    Publication date: July 25, 2002
    Inventors: Wei Tong, Frederick John Rink, James Michael Fogarty, John Wesley Griffith, Christian Lee Vandervort