Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1990-01-22
1993-06-15
Housel, James C.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
324318, 324322, H01F 700
Patent
active
052203026
ABSTRACT:
An NMR clinical chemistry analyzer includes a shield (20) having a plurality of elongate ferromagnetic bars (22) disposed around an NMR magnet (10) and aligned with its axis (13). A probe arm (28) is disposed within the axial bore (12) of the magnet (10) and is articulable in an axial direction to position any one of a plurality of sample modules (32) within the magnetic field "sweet spot" (144) such that tests may be performed on at least one fluid sample within the chosen sample module (32). Counterrotating conductive, nonferromagnetic cylinders (122, 124) are disposed within the axial bore (12) to assure magnetic field homogeneity. Robotics (50, 30, 34) are provided to automatically test fluid analytes without the need for manual changeout of the fluid testing vessel (102) or per-sample electronic shimming.
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Antich Pietro P.
Nunnally Ray L.
Housel James C.
Redding David
The University of Texas System & Board of Regents
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