Neil Charles Tigwell
Neil Charles Tigwell, Oxon GB
Patent application number | Description | Published |
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20090009170 | HIGH-MAGNETIC FIELD MRI SYSTEM WITHIN A HOUSING AND A METHOD OF OPERATING AN MRI SYSTEM WITHIN A HOUSING - An MRI system is housed within a housing that is provided with a set of deployable barriers that are attachable to the housing. The magnet in the MRI system may be operated at a first magnetic field intensity, such that the magnetic field outside of the housing remains below a safety limit when the barriers are not deployed. The magnet in the MRI system may be operated at a second magnetic field intensity, higher than the first, when the barriers are deployed, such that the magnetic field outside of the barriers remains below the safety limit. | 01-08-2009 |
20090193818 | Apparatus for Improved Precooling of a Thermal Radiation Shield in a Cryostat - A cryostat comprises a cryogen vessel housed within an outer vacuum container (OVC), a thermal radiation shield being located between an external surface of the cryogen vessel and an internal surface of the OVC. A decouplable thermal link arrangement is provided between an external surface of the cryogen vessel and an internal surface of the thermal radiation shield, being decoupled by action of an applied magnetic field. | 08-06-2009 |
20090273348 | CHAMBER APPARATUS AND METHOD OF MANUFACTURE THEREOF - A chamber apparatus comprises a chamber housing for maintaining a vacuum. The housing has a bore tube bounded by a substantially cylindrical wall formed at least in part from a coil suspended in a substantially non-metallic material. | 11-05-2009 |
Neil Charles Tigwell, Witney GB
Patent application number | Description | Published |
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20090184713 | Tomography System with Cooled Electrically Conductive Conduits - In a tomography system having a superconducting magnet and gradient coils, a cooling arrangement for cooling the gradient coils includes a cooling circuit which itself comprises an outward branch carrying cooling fluid to the gradient coils and a return branch carrying cooling fluid away from the gradient coils. At least part of each of the outward and return branches is formed of an electrically conductive conduit. The conduits provide electrical connections from a power supply to the superconducting magnet. In one embodiment, a first end of the bore of the first electrically conductive conduit is fluidly coupled to the bore of the outward branch; and a first end of the bore of the second electrically conductive conduit is fluidly coupled to the bore of the return branch. An electrically isolating bridging conduit is fluidly coupled between second ends of the first and second electrically conductive conduits. | 07-23-2009 |
20090184714 | HOUSING FOR A MAGNETIC RESONANCE IMAGING SCANNER AND A SCANNER - Pumping out of a vacuum vessel and housing of a scanner is facilitated by providing a hole through a radiation shield. To reduce radiation of heat via this hole to an inner coolant containing vessel a closure member is provided. This is held in spaced apart relationship during pump down by clips. The closure member is provided with a ferrous constituent or member which is then attracted inwards during initialization of the superconducting. This draws the closure member into engagement with the shield to close the hole and to prevent radiation thereby. The clips are profiled to maintain the abutment of the closure member over the hole. | 07-23-2009 |
20090188261 | Limiter for Limiting the Motion of Components in a Cryostat - A limiter is provided to limit the motion of components in a cryostat during transit. This permits the use of a support structure which minimises the disturbance to an insulating structure and thus reduces ingress of heat to the cryogen. Cryogen loss is reduced leading to lower operating costs. | 07-30-2009 |
20090193816 | Method and Apparatus for Controlling the Cooling Power of a Cryogenic Refrigerator Delivered to a Cryogen Vessel - The present invention provides a cryostat comprising a cryogen vessel ( | 08-06-2009 |
20100051307 | Cooled Current Leads For Cooled Equipment - A cooled current lead for conducting electrical current into a cooled vessel. The current lead comprises an electrical conductor ( | 03-04-2010 |
20110002111 | PROTECTION APPARATUS, METHOD OF LOCATING A SUPERCONDUCTIVE MAGNET UNIT AND SUPERCONDUCTIVE MAGNET UNIT APPARATUS - A protection apparatus for a superconductive magnet unit has a support frame for location relative to a portion of the superconductive magnet unit. The support frame is arranged to carry a buffer for protecting the superconductive magnet unit from a shock load. | 01-06-2011 |
Neil Charles Tigwell, Oxfordshire GB
Patent application number | Description | Published |
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20090262551 | IMAGING MAGNET WITH ILLUMINATED BORE - An imaging magnet has a patient bore for receiving a human or animal patient, including a body coil assembly having a body coil former and a body coil. The body coil assembly is provided with at least one source of light that is incorporated within the body coil assembly, and embedded within the body coil former, that radiates light into the patient bore. | 10-22-2009 |
20150027559 | OVER-PRESSURE LIMITING ARRANGEMENT FOR A CRYOGEN VESSEL - An over-pressure limiting arrangement for a cryogen vessel includes an access neck providing access into the cryogen vessel, a tubular structure extending through the access neck, a turret outer assembly joined leak-tight to the cryogen vessel and defining an interior volume that is separated from the atmosphere by a protective valve or burst disc, enclosing an upper extremity of the access neck and the tubular structure. An egress path defines a route for cryogen gas to escape from the turret outer assembly, and a pressure-responsive quench valve seals the egress path and opens when a differential pressure between the interior of the turret outer assembly and the interior of the egress path exceeds a predetermined value. An auxiliary burst disc, or a valve, is attached to the tubular structure within the turret outer assembly, with an inner surface thereof exposed to the interior of the tubular structure and an outer surface thereof exposed to the interior of the turret outer assembly. | 01-29-2015 |