Patents Represented by Attorney James Magee, Jr.

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  • Zinc oxide varistor structure
    Patent number: 4959262
    Abstract: A varistor device comprised of a multi-layer zinc oxide varistor matrix containing metallizations of silver.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: September 25, 1990
    Assignee: General Electric Company
    Inventors: Richard J. Charles, Achuta R. Gaddipati
  • Process for reducing contamination of high temperature melts
    Patent number: 4959841
    Abstract: A method of reducing contamination caused by high intensity heating of metals is taught. Splatter, vapor droplets and particulate matter is collected to avoid return to the melt. An electric field is established in the heating zone to attract the vapor droplets and particles to charged plates.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: September 25, 1990
    Assignee: General Electric Company
    Inventors: Neil A. Johnson, Russell S. Miller, Gordon B. Hunter
  • Composite with Y-BA-CU-O superconductive film
    Patent number: 4959346
    Abstract: A composite is produced comprised of Y--Ba--Cu--O superconductive film having a zero resistance transition temperature of at least about 38 K, a zirconium dioxide film and a substrate wherein the zirconium dioxide film is intermediate the superconductive film and the substrate.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: September 25, 1990
    Assignee: General Electric Company
    Inventors: Antonio Mogro-Campero, Larry G. Turner
  • Hafnium containing Nb-Ti-Al high temperature alloy
    Patent number: 4956144
    Abstract: An alloy is provided which has good operating strength and ductility at temperatures of 2000.degree. to 2500.degree. F. and density of between 6.5 and 7.0 g/cm.sup.3.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: September 11, 1990
    Assignee: General Electric Company
    Inventors: Melvin R. Jackson, Shyh-Chin Huang
  • Transfer tube with in situ heater
    Patent number: 4946082
    Abstract: An integral transfer tube is produced comprised of a hollow high density ceramic oxide tube having its outer surface wall surrounded by a low density ceramic oxide shell, and having a heating element comprised of a heating wound portion and two end portions wherein the wound portion is intermediate the tube and the shell, and wherein at least a sufficient amount of the end portions are exposed for electrical attachment.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: August 7, 1990
    Assignee: General Electric Company
    Inventors: Milivoj K. Brun, Marcus P. Borom, Steven A. Miller, Lawrence E. Szala, Paul S. Svec
  • Method of obtaining a fiber-containing composite
    Patent number: 4944904
    Abstract: Fibrous material is coated with boron nitride and a silicon-wettable material, the coated fibrous material is admixed with an infiltration-promoting material which is at least partly elemental carbon and the mixture is formed into a preform which is infiltrated with a molten solution of boron and silicon producing a composite containing boron nitride coated fibrous material.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: July 31, 1990
    Assignee: General Electric Company
    Inventors: Raj N. Singh, William A. Morrison
  • Process for producing a ceramic composite reinforced with noble metal coated ceramic fibers
    Patent number: 4933309
    Abstract: A composite is produced comprised of ceramic oxide fibrous material which is coated with a noble metal and disposed in a ceramic oxide matrix. The composite can be produced by contacting the coated fibrous material with matrix-forming oxide powder to form a compact and densifying the compact. Densification can be carried out by techniques such as sintering, isostatic pressing, and hot pressing. The composite can also be produced by forming the coated fibrous material into a preform having an open porosity and infiltrating the preform with a vapor of the matrix-forming material.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: June 12, 1990
    Assignee: General Electric Company
    Inventor: Krishan L. Luthra
  • Method of obtaining a filament-containing composite with a boron nitride coated matrix
    Patent number: 4931311
    Abstract: A composite is produced by admixing a matrix-forming material with organic binding material, forming the resulting mixture into a tape, disposing a layer of spaced boron nitride coated filaments between at least two of the tapes to form a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and hot pressing the resulting porous structure to form a composite containing spaced boron nitride coated filaments.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: June 5, 1990
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Nb-Ti-Al-Hf-Cr alloy
    Patent number: 4931254
    Abstract: An alloy having high strength at high temperature is provided.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: June 5, 1990
    Assignee: General Electric Company
    Inventor: Melvin R. Jackson
  • Method for calculating crack lengths of conductive sensors
    Patent number: 4924708
    Abstract: A method is provided for measuring crack growth in a solid comprising a sensor utilizing potential or voltage drop measurements across a preformed and propagating crack. Preferably the sensor is representative of a structural component and is exposed to an aggressive environment like that in which the structural component operates. Measured voltage values are plotted versus a distance at which the voltages are measured by a plurality of pairs of probes, and intercept values are obtained and used in combination with previously measured crack lengths in calculating subsequent crack lengths of a propagating crack.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: May 15, 1990
    Assignee: General Electric Company
    Inventors: Harvey D. Solomon, William R. Catlin
  • Process for preventing contamination of high temperature melts
    Patent number: 4926439
    Abstract: A method of reducing "fall back" contamination caused by high intensity heating of metals is taught. Splatter, vapor droplets and particulate matter resulting from the high intensity heating is repelled to avoid return to the melt. An electric field is established above the heating zone to repel the vapor droplets and particles from at least one charged electrode disposed above the surface where high intensity heat is applied to a metal surface.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: May 15, 1990
    Assignee: General Electric Company
    Inventors: Neil A. Johnson, Russell S. Miller, Gordon B. Hunter
  • Tungsten-modified titanium aluminum alloys and method of preparation
    Patent number: 4923534
    Abstract: A TiAl composition is prepared to have high strength and to have improved ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be a highly desirable effective aluminum concentration by addition of tungsten and rapid solidification from the melt according to the approximate formula Ti.sub.50-48 Al.sub.48 W.sub.2-4.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: May 8, 1990
    Assignee: General Electric Company
    Inventors: Shyh-Chin Huang, Michael F. X. Gigliotti, Jr.
  • Ceramic composite
    Patent number: 4921822
    Abstract: A composite is produced comprised of ceramic oxide fibrous material which is coated with a noble metal and disposed in a polycrystalline ceramic oxide matrix.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: May 1, 1990
    Assignee: General Electric Company
    Inventor: Krishan L. Luthra
  • Furnace enclosure having a clear viewpath
    Patent number: 4918705
    Abstract: A clear optical path is provided in a furnace in which high intensity top surface heating is carried out. The path extends through a viewport to the interior of the furnace chamber. The path extends to a clear metal mirror surface and from the mirror surfaced to other portions of the furnace chamber which are not viewable directly through the viewport.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: April 17, 1990
    Assignee: General Electric Company
    Inventors: Neil A. Johnson, Russell S. Miller, Gordon B. Hunter
  • Fiber- and filament-containing ceramic preform and composite
    Patent number: 4917941
    Abstract: A fiber- and filament-containing ceramic preform comprised of a mixture of discontinuous fibers and particulates surrounding a layer of continuous filaments extending substantially through the mixture is produced and infiltrated with a molten ceramic to produce a composite.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: April 17, 1990
    Assignee: General Electric Company
    Inventors: William B. Hillig, Henry C. McGuigan
  • Method of producing a coated fiber-containing composite
    Patent number: 4915760
    Abstract: A composite is produced by depositing an organic slurry of ceramic matrix-forming material on a layer of boron nitride coated fibrous material forming a tape therewith on drying, forming a layered structure of the tapes, laminating the structure, firing the laminated structure to burn out organic material and hot pressing the resulting porous structure to form a composite.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: April 10, 1990
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Gamma titanium aluminum alloys modified by carbon, chromium and niobium
    Patent number: 4916028
    Abstract: A TiAl composition is prepared to have high strength and to have improved ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be a highly desirable effective aluminum concentration by addition of chromium, carbon and niobium according to the approximate formula Ti.sub.51-43 Al.sub.46-50 Cr.sub.2 Nb.sub.1-5 C.sub.0.1.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: April 10, 1990
    Assignee: General Electric Company
    Inventor: Shyh-Chin Huang
  • High strength non-magnetic alloy
    Patent number: 4911884
    Abstract: This invention relates to corrosion resistant, austenitic, non-magnetic alloys. The alloys contain about 32 to 38% nickel, about 3 to 7% chromium, about 3 to 5% titanium, about 0.3 to 1.5% aluminum, about 0.5 to 1.5% molybdenum, an effective amount of vanadium, about 0.005 to 0.02% boron, up to about 0.02% carbon, and the balance substantially iron. The alloys are controlled temperature hot rolled and age annealed to provide strain hardening and precipitation strengthening to achieve yield strength objectives established for retaining rings in new high capacity generators. Yield strengths of at least about 200 ksi can be produced by the alloys of this invention making them suitable for use in new high capacity generators.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: March 27, 1990
    Assignee: General Electric Company
    Inventor: Keh-Minn Chang
  • High strength oxidation resistant alpha titanium alloy
    Patent number: 4906436
    Abstract: Alpha titanium alloys containing aluminum, hafnium and/or tantalum has been found to have improved creep and tensile strengths as well as oxidation resistance at temperature up to about 700.degree. C. without embrittlement.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: March 6, 1990
    Assignee: General Electric Company
    Inventors: Francis X. Gigliotti, Jr., Raymond G. Rowe, Gerald E. Wasielewski, deceased
  • Material system for high temperature jet engine operation
    Patent number: 4904546
    Abstract: A materials system is provided which is adapted for use in jet engines operable at high temperature and at lower density than possible with nickel base superalloys. A range of niobium base alloys is combined with a range of protective metallic coatings to provide a material system which permits a wide variety of alloy properties and performance characteristics to be combined in structural components of jet engines.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: February 27, 1990
    Assignee: General Electric Company
    Inventor: Melvin R. Jackson