Patents Represented by Attorney James C. Davis

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  • Redundant cryorefrigerator system for a refrigerated superconductive magnet
    Patent number: 5111665
    Abstract: A cryorefrigerator mount for a refrigerated superconductive magnet is disclosed. In particular, a cryorefrigerator system has two separate cryorefrigerators such that one of the cryorefrigertors contacts and cools the magnet while the other cryorefrigerator is held in a raised, standby position. If the first cryorefrigerator malfunctions and can no longer cool the magnet, the second cryorefrigerator is lowered to contact and cool the magnet. The first cryorefrigerator is then raised so it can be repaired, serviced or replaced.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: May 12, 1992
    Assignee: General Electric Company
    Inventor: Robert A. Ackermann
  • Superconductive magnet with thermal diode
    Patent number: 5113165
    Abstract: A superconductive magnet having at least one superconductive coil is provided. A thermal radiation shield is situated inside a vacuum vessel and the thermal radiation shield encloses the superconductive coil. A thermal diode is provided for thermally linking the superconductive coil and the thermal radiation shield when the thermal radiation shield is colder than the superconductive coil.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: May 12, 1992
    Assignee: General Electric Company
    Inventor: Robert A. Ackermann
  • Dynamic phase focus for coherent imaging beam formation
    Patent number: 5111695
    Abstract: A method for dynamic focus of received energy, in a vibratory energy imaging system, into a beam in which contribution from transducers in an array of N such transducers, are progressively enabled to contribute to beam focussing dependent upon distance between a particular j-th transducer (where 1.ltoreq.j.ltoreq.N) is responsive to the depth, or range R, of the focal point at any instant of time; the initial steering angle .theta., with respect to the array normal, is used in conjunction with a range clock, to determine the time when each off-normal transducer channel is enabled to add to the beam (dynamic apodization) and to finely adjust the channel time delay to properly focus the beam after the enablement of the channel.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: May 12, 1992
    Assignee: General Electric Company
    Inventors: William E. Engeler, Matthew O'Donnell, John T. Pedicone, John J. Bloomer
  • High-frequency current-viewing resistor
    Patent number: 5113171
    Abstract: A current-viewing resistor for accurately measuring high-frequency currents, e.g. at radio frequencies, includes a first resistance connected in series with a first inductance, the series combination being connected in parallel with a series combination of a second resistance and a second inductance. The second resistance is relatively large as compared with the first resistance, and the second inductance is relatively large as compared with the first inductance. The ratio of the first resistance to the first inductance is substantially equal to the ratio of the second resistance to the second inductance. As a result, the voltage measured across the second resistance is substantially equal to the voltage across the first resistance, and the current through the first resistance is substantially equal to the current to be measured.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: May 12, 1992
    Assignee: General Electric Company
    Inventor: Sayed-Amr A. El-Hamamsy
  • Optical fiber quick connect/disconnect having electrical contacts
    Patent number: 5113461
    Abstract: This invention discloses an optical fiber connect/disconnect for power lasers. The connect/disconnect should allow a laser/fiber user to quickly interface fiber injection input and fiber output couplers while providing electrical and optical alignment. The connect/disconnect also offers a fail safe connection in that the laser should not transmit any power unless and until electrical interlocks and optical alignments are completed.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: May 12, 1992
    Assignee: General Electric Company
    Inventor: Angel L. Ortiz, Jr.
  • Method of melt forming a superconducting joint between superconducting tapes
    Patent number: 5109593
    Abstract: Superconducting tapes having an inner laminate comprised of a parent-metal layer, a superconductive alloy layer on the parent-metal, a reactive-metal layer, and an outer laminate soldered thereon are joined in a superconducting joint by the method of this invention. The outer laminate is removed to form exposed sections, and the tapes are positioned so that the exposed sections are in contact. A melt zone within the exposed sections where the exposed sections are in contact is melted. The melt zone is at least large enough to provide sufficient parent-metal, superconductive alloy, and reactive-metal to form a melt that resolidifies as a continuous precipitate of the superconductive alloy. The melt resolidifies as a continuous precipitate of the superconductive alloy that is continuous with the superconductive alloy on the superconducting tape.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: Mark G. Benz, Bruce A. Knudsen, Lee E. Rumaner, Robert J. Zabala
  • Demountable coil form for epoxy-impregnated coils
    Patent number: 5111172
    Abstract: A demountable coil form for fabricating epoxy impregnated superconductive coils having a split ring and a collar clamp secured to the ring on either side of an axially extending opening for adjusting the size of the ring opening. The axially extending opening is widest at its inner diameter and tapers towards the outer diameter of the ring. Cap screws in contact with a wedge and connected to the ring are provided for securing the wedge in the opening in the ring. The wedge has a taper matching the taper of the opening in the ring and is positioned flush with the outer diameter of the ring. Annular side plates are secured to either axial side of the ring, with the side plates extending radially outwardly from the ring. The side plates define slots which create a passageway from the exterior of the side plates to the interior.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventor: Evangelos T. Laskaris
  • Preparation and polymerization of cyclic aromatic ketones
    Patent number: 5110893
    Abstract: A composition and method of making macrocyclic aryl ether ketones useful in the preparation of high molecular weight resins. Macrocyclic aryl ether ketone compositions having structural units of the formula ##STR1## wherein n is an integer from about 2 to about 20, are prepared by contacting a dihalo compound of the formula ##STR2## wherein X is a halogen with a compound of the formulaHO--A--OHin the presence of a dipolar aprotic solvent and a base, wherein A is a bridged biphenyl group selected from the group including formulas--A.sup.1 --Y--A.sup.2 -- and (I) ##STR3## wherein each A.sup.1 and A.sup.2 is a single ring divalent aromatic radical, Y is a bridging radical in which one or two atoms separate from A.sup.2, R.sup.1 is independently C.sub.1-4 primary of secondary alkyl or halo, and n.sub.1 is 0 to about 3.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventor: James M. Fukuyama
  • Multicellular FET having a Schottky diode merged therewith
    Patent number: 5111253
    Abstract: A semiconductor power switching device comprises a multicellular FET structure with a Schottky barrier diode structure interspersed therewith with at least some of the FET cells being free of Schottky barrier portions. The ratio of Schottky barrier contact area to FET cell area in the overall device may be adjusted to tailor the device for operation at specific current densities.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: Charles S. Korman, Bantval J. Baliga, Hsueh-Rong Chang
  • System for performing addition and subtraction of signed magnitude floating point binary numbers
    Patent number: 5111421
    Abstract: A versatile floating point adder which performs high speed floating point addition or subtraction on operands supplied in a signed magnitude format includes separate exponent and mantissa data paths for processing the exponent fields and mantissa fields of the floating point binary numbers to be added or subtracted. The exponent data path computes the absolute difference between the exponents of the floating point numbers, passes the large exponent, and adjusts the large exponent by an amount needed to normalize the mantissa and to reflect an overflow in the mantissa addition/substration and mantissa rounding operations. The mantissa data path denormalizes one of the input mantissas, adds the two mantissas after the denormalization operation, post-normalizes the resulting mantissa, and rounds the mantissa to the correct precision.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: Karl J. Molnar, Ho Chung-Yih, Daniel A. Staver, Barbara D. Molnar
  • Thermoplastic polycarbonate composition having improved oxygen barrier properties from diester diol
    Patent number: 5110897
    Abstract: High molecular weight, thermoplastic aromatic polycarbonate compositions exhibiting improved oxygen barrier properties are provided which comprise structural units derived from a diester bisphenol or a cyano-substituted bisphenol, or an aromatic dihydric phenol in admixture with either of the foregoing bisphenol compounds. Novel cyano-substituted bisphenol monomers are also provided.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: John C. Schmidhauser, Kathryn L. Longley
  • Transparent diamond films and method for making
    Patent number: 5110579
    Abstract: A method is provided for making substantially transparent polycrystalline diamond film having a thickness greater than 50 microns which can be used in glazing applications and as a heat sink in microelectric applications. A mixture of hydrogen and methane is conveyed into a heated filament reacting zone which is adjacent to an appropriate substrate, such as a molybdenum substrate to produce non-adherent polycrystalline substantially transparent diamond film.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: Thomas R. Anthony, James F. Fleischer
  • Substituted 3,4-polymethylenedioxythiophenes, and polymers and electro responsive devices made therefrom
    Patent number: 5111327
    Abstract: Substituted 3,4-dimethylenedioxythiophenes are provided. The substituted 3,4-dimethylenedioxythiophenes can be polymerized by chemical or electro-chemical means to produce polymers which are useful as EMI shielding and for making smart windows and switches.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: Margaret L. Blohm, James E. Pickett, Paul C. VanDort
  • Apparatus for controlling a dual evaporator, dual fan refrigerator with independent temperature controls
    Patent number: 5109678
    Abstract: A refrigerator apparatus is provided having a cabinet with a freezer compartment and a fresh food compartment. The compartments define two passageways allowing air circulation therebetween. A refrigerator system is included having a compressor, a condenser, an expansion valve, an evaporator situated in the freezer compartment. The refrigerator system elements are connected in series in a closed loop, in a refrigerant flow relationship. A first fan is situated in the freezer compartment for providing air flow over the evaporator. A second fan is situated in one of the two passageways for providing air circulation between the two compartments. A first thermostatic controller situated in the freezer compartment for maintaining a desired temperature in the freezer compartment by causing the compressor and the first fan to operate.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: May 5, 1992
    Assignee: General Electric Company
    Inventors: Heinz Jaster, Warren F. Bessler
  • Switching system for a multidimensional gas chromatograph
    Patent number: 5108468
    Abstract: A switching device for a high resolution multidimensional gas chromatograph and a method of supplying a constituent from a component of a sample in a gas chromatograph effluent to a mass spectrometer. A series of open-split interfaces are interposed between a series of gas chromatographs having gas chromatographic columns with different liquid phases. An inert auxiliary fluid such as helium is supplied to the interfaces for carrying the effluent through the various stages of the device. A transfer member of the first interface is initially positioned to a first position to divert the inert fluid and the effluent to atmosphere until the desired component starts eluting from the first gas chromatograph. The transfer member of the first interface is then repositioned to a second position to direct the component and the inert fluid to the second gas chromatograph.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: April 28, 1992
    Assignee: General Electric Company
    Inventor: Woodfin V. Ligon, Jr.
  • Epoxy/polyimide copolymer blend dielectric and layered circuits incorporating it
    Patent number: 5108825
    Abstract: A copolymer blend of epoxy and polyimide is used as a dielectric layer in a multilayer interconnect structure. This copolymer blend is free of cracking and crazing, provides good interlayer adhesion and following fabrication, is stable at temperatures in excess of 200.degree. C. A preferred composition is a siloxane polyimide in combination with a cycloalaphatic epoxy.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: April 28, 1992
    Assignee: General Electric Company
    Inventors: Robert J. Wojnarowski, Charles W. Eichelberger
  • Method for interconnecting a stack of integrated circuits at a very high density
    Patent number: 5107586
    Abstract: Interconnected integrated cirucits (16) packaged at a very high density are fabricated beginning with a plurality of substrates (50 or 400 or 500) where each substrate has metal edge contact sites (12 or 507). Several substrates are joined together in a stack (82 or 402 or 512) held together tightly by bolts (62) or by a thermoplastic adhesive (510). An interconnect pattern (250 or 423) electrically connects integrated circuits (16) on different substrates. Defective substrates are removable from the stack for repair by removing the bolts or by heating the adhesive to soften it sufficiently to allow removal of the individual substrate. The interconnect pattern, which is removed whenever a substrate is replaced, is reapplied after the removed substrate has been replaced.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: April 28, 1992
    Assignee: General Electric Company
    Inventors: Charles W. Eichelberger, Robert J. Wojnarowski
  • Curable dielectric polyphenylene ether-polyepoxide compositions useful in printed circuit board production
    Patent number: 5108842
    Abstract: Curable compositions containing a polyphenylene ether and a polyepoxide composition containing brominated and non-brominated bisphenol polyglycidyl ethers, in combination with further components including specific catalysts and hardeners, may be used in the preparation of laminates useful as printed circuit boards and bonding sheets therefor and having excellent physical and electrical properties.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: April 28, 1992
    Assignee: General Electric Company
    Inventors: John E. Hallgren, Victoria J. Eddy, James E. Tracy
  • Heat curable silicone compositions
    Patent number: 5106934
    Abstract: Heat curable silicone compositions are provided. Some of the heat curable silicone compositions are convertible to silicone elastomers having a high tear strength resulting from the employment of polydiorganosiloxane gum having condensed organoalkenylsiloxy units, which is used in combination with an organosilicon material having tetraorganodisilanoxy groups and a Group VIII metal catalyst, such as platinum in elemental or chemically combined form.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: April 21, 1992
    Assignee: General Electric Company
    Inventors: Jeffrey H. Wengrovius, Virginia M. Van Valkenburgh
  • One part heat curable organopolysiloxane compositions
    Patent number: 5106939
    Abstract: Shelf stable heat curable mixtures of vinyl substituted organopolysiloxane fluid and siloxane hydride are provided. The one part polyorganosiloxane mixtures are catalyzed with an inclusion compound of a cyclodextrin and a complex of a cyclopentadiene, 1,5-cyclooctadiene or norbornadiene and a platinum group metal material, such as a C.sub.(1-4) alkyl substituted platinum or a rhodium halide.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: April 21, 1992
    Assignee: General Electric Company
    Inventors: Chris A. Sumpter, Larry N. Lewis, Kevin X. Lettko, Mark W. Davis