Patents Represented by Attorney James O'Hare

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  • Shim lead assembly with flexible castellated connector for superconducting magnet
    Patent number: 5307037
    Abstract: A flexible castellated joint is included in the shim lead assembly electrically connecting the cryostat pressure vessel and the outer vacuum vessel in a superconducting magnet to accommodate relative motion between the two vessels during transportation of the superconducting magnet.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: April 26, 1994
    Assignee: General Electric Company
    Inventors: Daniel C. Woods, William S. Stogner
  • Coextruded laminates containing polyketone polymers
    Patent number: 5300338
    Abstract: A coextruded laminate may be formed by coextruding a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon (a polyketone polymer) with an other thermoplastic polymer, without the use of an adhesive or tie layer, wherein the other thermoplastic polymer is polyvinylidene fluoride, nylon-6,6, or phenoxy resin.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: April 5, 1994
    Assignee: Shell Oil Company
    Inventors: Paul S. Byrd, Jr., Dixie G. Waters
  • Method and apparatus for laminating foils into a superconducting tape for use in a superconducting magnet
    Patent number: 5299728
    Abstract: Apparatus and method for forming long lengths of laminated superconducting tape by passing three foils over idler pulleys, through a solder bath and between pinch rollers having a portion which extend above the solder bath to enable cleaning of the pinch rollers during the formation of the superconducting tape with means to adjust the pressure applied by the pinch rollers, and to adjust the laminated tape takeup tension independently from the foil process tension.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: April 5, 1994
    Assignee: General Electric Company
    Inventors: Christopher G. King, Gerhard S. Kobus, Anthony Mantone, Malvin L. Dennis, Frank D. Shaffer, Richard A. Stephens, Neil G. Fiddes
  • Adjustable alignment for cryogen venting system for superconducting magnet
    Patent number: 5291739
    Abstract: An adjustable alignment assembly for a cryogen venting system for a superconducting magnet including a radially adjustable floating flange connection with a cryogenic seal to enable precise alignment of the cryostat vent pipe with the ceiling vent pipe of the room in which the superconducting magnet is installed.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: March 8, 1994
    Assignee: General Electric Company
    Inventors: Daniel C. Woods, William S. Stogner, Robert R. Carey
  • Polymerization process
    Patent number: 5292699
    Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon comprises contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a reaction diluent and a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bis(diethylphosphino)alkane.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: March 8, 1994
    Assignee: Shell Oil Company
    Inventor: Eit Drent
  • Polymerization catalyst
    Patent number: 5292700
    Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, preferably propylene, includes an aromatic amine in the catalyst composition formed from a palladium salt, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus. The presence of the aromatic amine reduces the proportion of 3-alkyl-2,5-furandiyl moieties present in the polymer chain.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: March 8, 1994
    Assignee: Shell Oil Company
    Inventors: Peter A. A. Klusener, Johannes J. M. Snel, Hans A. Stil
  • Connector cooling and protection for power coupling assembly for superconducting magnets
    Patent number: 5291168
    Abstract: Power couplings are provided from outside the shell of a superconducting magnet through the intervening space and through the cryogen pressure vessel to the magnet coils within the vessel. The multi-pin shim magnet connector is replaceable without cutting the vessel open and the shim and main magnet main coil connectors include central apertures through which cryogen boil-off gas is flowed before venting to cool the connectors and reduce boil-off.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: March 1, 1994
    Assignee: General Electric Company
    Inventors: Daniel C. Woods, William S. Stogner, David R. Turner
  • Open architecture magnetic resonance imaging superconducting magnet assembly
    Patent number: 5291169
    Abstract: An open architecture Magnetic Resonance Imaging Magnet with a pair of spaced annular superconducting magnet assemblies utilizing a cantilevered main magnet coil and correction magnet coil within each assembly.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: March 1, 1994
    Assignee: General Electric Company
    Inventors: Oluwasegun O. Ige, Bu-Xin Xu
  • Variable focussed X-ray grid
    Patent number: 5291539
    Abstract: A flexible elongated slatted grid structure is suspended between a pair of spaced apart grid support frames each of which is adapted for rotation about a transverse axis intermediate the suspended ends of the grid. Mechanical adjustment means provides equal but opposite angular motion of the frames to curve the grid along a circular path.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: March 1, 1994
    Assignee: General Electric Company
    Inventors: Gary J. Thumann, Jonathan C. Boomgaarden, Daniel P. Miller
  • Polymer blends
    Patent number: 5288800
    Abstract: It is herein disclosed a blend comprising modified block copolymers and aromatic polycarbonates. These blends have and exhibit improved mechanical properties, particularly improved low temperature Notched Izod impact strength relative to unmodified block copolymers, such as KRATON.RTM. G.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: February 22, 1994
    Assignee: Shell Oil Company
    Inventor: John D. Wilkey
  • Polyolefin compositions
    Patent number: 5281670
    Abstract: It is herein provided a polymer blend comprising of polybutylene and a functionalized polyolefin such as maleated polypropylene. The blend has and exhibits an unexpectedly high degree of adhesion to polar polymers and metal surfaces, and enhances the use of polybutylene in applications for which adhesion to polar surfaces is required.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: January 25, 1994
    Assignee: Shell Oil Company
    Inventors: Robert W. Lee, Meredith S. Ott, Cesar O. Castro
  • Metallized films
    Patent number: 5281483
    Abstract: It is herein disclosed a metallized film having an exhibiting a superior surface gloss, said film comprising a blend of (i) no more than about 10% by weight of low molecular weight, isotactic poly-1-butene with a melt flow in the range, of greater than 20 to about 1500 g/10 min., and (ii) at least about 90% by weight of a propylene polymer.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: January 25, 1994
    Assignee: Shell Oil Company
    Inventor: Charles C. Hwo
  • Reinforced polyketone polymers
    Patent number: 5274040
    Abstract: Reinforced polymer blends with improved mechanical properties are produced from a blend of a polyketone polymer and an uncured phenolic-based novolac resin, reinforced with glass fibers.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: December 28, 1993
    Assignee: Shell Oil Company
    Inventor: Joseph M. Machado
  • Inductively coupled multi-section radio frequency field coil for NMR
    Patent number: 5274332
    Abstract: An NMR radio-frequency (RF) coil is made up, in the preferred embodiment, of upper and lower coil assemblies. Each coil assembly includes a tuned circuit. In operation, only one of the tuned circuits is energized, while the other is mutually inductively coupled such that they resonate together as one circuit at substantially the same frequency. A first set of latches is provided to fasten the lower coil assembly to a patient cradle. A second set of latches is utilized to fasten the upper coil assembly to the lower while permitting relative longitudinal motion between the two assemblies.In another embodiment, which does not utilize mutual inductance, the tuned circuits on each assembly are electrically connected to form a complete coil by means of, for example, an electrical plug-and-jack arrangement.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: December 28, 1993
    Assignee: General Electric Company
    Inventors: Patrick L. Jaskolski, Thomas J. Sierocuk
  • Catalyst compositions
    Patent number: 5266545
    Abstract: A catalyst composition useful in the preparation of a polymer composition includes a Group VIII metal and a phosphorus bidentate ligand of the general formula (R.sub.2)(R.sub.4)P--R.sub.3 --P(R.sub.2)(R.sub.4) wherein R.sub.2 and R.sub.4 are optionally polar substituted alkyl groups, differing from each other in carbon number, and wherein R.sub.3 is a divalent organic bridging group which contains four atoms. Such catalyst compositions are particularly useful for preparing copolymers of carbon monoxide with .alpha.-olefins having at least three carbon atoms.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: November 30, 1993
    Assignee: Shell Oil Company
    Inventors: Peter A. A. Klusener, Johannes J. M. Snel
  • Polyketone containing graphite nucleating agent
    Patent number: 5266629
    Abstract: A crystallizable thermoplastic polymer composition is prepared by adding a small amount of a substantially graphitic non-turbostratic carbon to a polyketone polymer. The graphitic carbon acts as a nucleating agent, increasing the crystallization rate of polyketone polymer.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: November 30, 1993
    Assignee: Shell Oil Company
    Inventors: Donald H. Weinkauf, Ananda M. Chatterjee
  • Actively cooled baffle for superconducting magnet penetration well
    Patent number: 5265430
    Abstract: Apparatus for reducing heat leakage into the interior of a liquid cryogen-holding vessel from the sealed well through which the vessel is accessed. An actively cooled heat sink in the well transfers heat to low temperature cryogen vapor venting from this vessel to the external environment.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: November 30, 1993
    Assignee: General Electric Company
    Inventors: William E. Chen, Daniel C. Woods
  • One phase melt radial polymer
    Patent number: 5266648
    Abstract: A symmetric star block copolymer having and exhibiting one phase melt behavior comprising from about 3 to 30 arms, wherein each of said arm has a molecular weight of from about 20,000 to 35,000; said arms coupled with a suitable coupling agent; and wherein said arms comprises monomers of monoalkenyl aromatic hydrocarbon and conjugated diolefins; and wherein said monoalkenyl aromatic hydrocarbon is present in an amount of from about 20 to 40 wt % of the star block copolymer. Also disclosed is a process for preparing these one phase melt block copolymers.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: November 30, 1993
    Assignee: Shell Oil Company
    Inventor: Michael A. Masse
  • X-ray tube rotor controller using the main high voltage inverters for acceleration and speed maintenance
    Patent number: 5265146
    Abstract: An x-ray tube rotor controller uses the main high voltage inverters for acceleration and speed maintenance. The rotor controller includes a DC voltage source, and a rotary anode drive circuit including a rotary anode motor designed as a two-winding induction motor. The rotor controller comprises first and second inverter circuits which may be either half bridge or full bridge arrangements, the first and second inverter circuits for accelerating the anode, and further for generating high voltage for the x-ray tube. Electronic switching means allow for instantaneous electronic switching of the output of the first and second inverter circuits between the high voltage power supply and the anode motor. A phase switching capacitor may be used to provide the other phase of the motor.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: November 23, 1993
    Assignee: General Electric Company
    Inventors: William F. Wirth, Gerald K. Flakas
  • Polyketone polymer blends
    Patent number: H1302
    Abstract: Improved compositions comprise polymer blends of a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon with an ethylene/propylene/non-conjugated diene terpolymer, and, optionally, an acidic polymer containing moieties of an .alpha.-olefin and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid. The blends demonstrate improved barrier properties.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: April 5, 1994
    Assignee: Shell Oil Company
    Inventor: Eric R. George