Patents by Inventor Guy Aubert

Guy Aubert 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: 4862085
    Abstract: A system is provided for regulating the field of a high homogeneity magnet. The fluid used for cooling the main magnet is placed in thermal contact with a high homogeneity auxiliary magnet in which is placed an NMR probe which controls the current supply to the two magnets connected in series.
    Type: Grant
    Filed: May 4, 1988
    Date of Patent: August 29, 1989
    Assignee: Thomson-CGR
    Inventors: Guy Aubert, Daniel Kaplan
  • Patent number: 4847985
    Abstract: To make a gradient coil, it is decided to cut the conductors of this coil out of a plate. Thus flat conductors can be used. This helps reduce the self-inductance of the coil to be made. The coil is, moreover, optimized. A calculation is made of the coefficients of the breakdown into spherical harmonics of the field created by the coil. The coil's structure is modified so as to cancel those coefficients of this breakdown which generate a divergence in this field. It is shown that, in this way, the solution is an optimum one.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: July 18, 1989
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4835504
    Abstract: A block of magnetized material for adjusting and correcting a magnetic field produced by a magnet provides adjustable correction by modifying the orientation of the magnetic moment of the block with respect to the field. A device which includes an intermediate member rotatably mounted in an orientable support and a fixing member rotatably mounted in the intermediate member makes it possible to orient a preferred direction of the block in a predetermined direction. This results in modification of magnetic disturbances produced by the block in the zone of interest of the magnet. Quantization of pointing of the orientable support is obtained by means of graduated index marks on the support, on the intermeidate member and on the fixing member.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: May 30, 1989
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4823101
    Abstract: A method is provided for manufacturing a Bitter coil by indium welding and a solenoid magnet obtained by using this method. The Bitter disks or parts of such disks are welded with an indium filler, deposited preferably electrolytically on the portions to be assembled together.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: April 18, 1989
    Assignee: Centre National De La Recherche Scientifique
    Inventor: Guy Aubert
  • Patent number: 4820982
    Abstract: A device is provided for exploring the inner volume of a cylinder, including a probe holder driven with a translational movement by a shaft and with a pivoting movement by a mandrel along and about the axis of the cylinder. By placing probes in housings previously formed in the probe holder, all the points inside the cylinder may be reached. The operations are carried out from inside the cylinder. The device further includes apparatus for fixing and adjusting the position of a framework holding the shaft. Associated devices allow predetermined positions to be reached not only along the axis but also in angular orientation.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: April 11, 1989
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4812765
    Abstract: A method is provided for adjusting the homogeneity correctors of the magnetic field created by a magnet. In the invention an analytic expression of the field is calculated in the form of a breakdown into spherical harmonics. Similar breakdowns into spherical harmonics are also calculated but relative to the field created by each of the correction means available for correcting this field. Then an algebraic combination is made of the analytic expressions of the correction means so as to produce a correction analytic expression which, added to the analytic expression of the real field, transforms it into an analytic expression corresponding to an ideal magnetic field. Then the correction means are adjusted as a function of the parameters of the algebraic combination.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: March 14, 1989
    Assignee: Centre National de la Recherche Scientifique
    Inventor: Guy Aubert
  • Patent number: 4808956
    Abstract: A coreless solenoidal magnet is provided formed by a Bitter coil with improved field homogeneity. According to the invention the tie rods of the stack of disks are used for bringing the current back towards one of the axial ends of the magnet without creating a parasite field.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: February 28, 1989
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4774487
    Abstract: A structure is provided for connection between spaced Bitter coils in a magnet with homogeneous field. The magnet is formed of several Bitter coils spaced apart from each other and two adjacent coils are connected together by two groups of conductors symmetrical with respect to a plane and in which the current components create ampere turns in opposition.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: September 27, 1988
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4748429
    Abstract: A resistive solenoid magnet with homogeneous field is provided more particularly for NMR image formation.According to the invention, the magnet comprises several coils preferably Bitter coils and some parameters such as the lengths of the coils, the distances which separate them and their outer diameter are chosen for optimizing the power-mass product of the magnet.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: May 31, 1988
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4745387
    Abstract: A structure is provided for connecting the disks of a Bitter coil. The disks each include a cut out in the form of a slit, for example undulating so as to define from one disk to another zones with overlapping of turns divided into two groups and the electric connections are provided by junctions of said overlapping zones of one group or the other, alternatively from one disk to another.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: May 17, 1988
    Assignee: Centre National de la Recherche Scientifique
    Inventor: Guy Aubert
  • Patent number: 4743879
    Abstract: A solenoidal magnet is provided with high magnetic field homogeneity, including a connection structure between spaced coils. The current between two adjacent spaced coils is transmitted in one direction by a longitudinal conductor and in the other direction by two longitudinal conductors disposed on each side of said first conductor.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: May 10, 1988
    Assignee: Thomson-CGR
    Inventor: Guy Aubert
  • Patent number: 4736176
    Abstract: A structure is provided for connection between Bitter coils in a magnet with homogeneous field. The magnet is formed of several Bitter coils joined side by side and whose disks are of different thicknesses and two adjacent coils are connected together by a transition disk forming a turn and having for example a set-back on each of its faces for adapting it to the different thicknesses of the disks of two coils.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: April 5, 1988
    Assignee: Thomson-CGR
    Inventor: Guy Aubert