Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1979-12-18
1982-11-16
Hickey, Robert J.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335297, 335304, 335306, H01F 300, H01F 702, H01F 708
Patent
active
043597068
ABSTRACT:
Pole piece structures for permanent magnets and electromagnets, more particularly for superconducting electromagnets, and pole piece extensions and shields adapted, separately and in combination, to achieve a high concentration of the magnetic flux along the principal magnetic axis of the pole pieces, and preventing magnetic flux leakage and dispersion. The pole pieces are preferably conical or frusto-conical, or in the form of hollow cylinders or conical cylinders or, alternatively, provided with a tapered step ending in a pointed cylinder, a flat cylinder, or a hollow cylinder. The pole piece configurations provide a high concentration of magnetic flux intensity in the magnetic gap between the pole pieces either along the centerline of the pole pieces or in a cylindrical space disposed axially along the centerline of the pole pieces. Pole piece extensions, or field concentration members in the form of cylindrical, frusto-conical, helical shields or, alternatively, in the form of cylindrical, frusto-conical, single or multiple concentric shields, are disposed around the pole pieces as a further arrangement for shaping the magnetic flux and concentrating the high intensity magnetic lines of force in an appropriate region of the magnetic gap between the ends of the pole pieces, thus producing a high flux intensity in a predetermined region of the gap space in applications where such a controlled high intensity magnetic flux is required, as, for example, for magnetically confining a critical mass of ions, such as deuterons and tritons in an energy fusion reaction.
REFERENCES:
patent: 2715166 (1955-08-01), Fitch
patent: 2804548 (1957-08-01), Ruska
patent: 3325757 (1967-06-01), Gang
patent: 3417356 (1968-12-01), Tschopp
patent: 3781736 (1973-12-01), Parker
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