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US 6,535,092 B1Granted
Device for generating a variable magnetic field
AssigneeMagnetic Solutions (Holdings) Limited
InventorsDavid Patrick Hurley, John Michael David Coey
Life of this patent
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AssigneeMagnetic Solutions (Holdings) Limited
InventorsDavid Patrick Hurley, John Michael David Coey
Estimating the term…
A device (1) for generating a variable composite magnetic field comprises top and bottom concentric ring members (3, 4) which define a main central axis (5) and a central area (4) within which the composite magnetic filed is formed. Rod-like permanent magnets are located thin respective annuli (15) of the respective ring members (2, 3), and are equi-spaced circumferentially along a pitched circle (21). The permanent magnets (18) are rotable about corresponding secondary axes (19) which extend parallel to each other and parallel to the main central axis (5). The permanent magnets (18) are magnetised with their respective direction of magnetisation extending transversely of their secondary axes (19) and are independently rotatable by corresponding stepper motors (22) in respective of annuli (16) of the ring members (2, 3) for orienting the permanent magnets (18) about their respective secondary axes (19) for in turn altering the composite magnetic field generated in the central area (4).
A device for generating a variable composite magnetic field, the device comprising a ring member (2,3) defining a main central axis (5) and a central area (4) around the central axis (5) within which the composite magnetic field is generated, a plurality of discrete magnetic field generating means (18) for generating respective magnetic fields mounted at spaced apart intervals around the ring member (2,3) for generating the composite magnetic field in the central area (4), characterised in that the respective magnetic field generating means (18) are orientably mounted on the ring member (2,3) for varying the orientations of the magnetic fields generated by the magnetic field generating means (18) for varying the composite magnetic field, and a means (22) is provided for varying the orientations of the magnetic field generating means (18) and for retaining the magnetic field generating means (18) in desired orientations.
Dependencies are inferred from the claim text.