Magnetic assembly

摘要

A magnetic assembly includes a cylindrical magnet 1 having opposing magnetic poles disposed at respective first and second faces 2 and 3. A cup-shaped ferrous metal housing 4 forms a magnetic shield around the magnet 1 enclosing the second face 3, with an end face 7 continuously surrounding the first face 2. A ring magnet 8 surrounds the housing 4 with opposing magnetic poles disposed at respective first and second faces 9 and 10 with the first face 9 surrounding the end face 7 of the housing. The ring magnet 8 is enclosed within a further ferrous metal housing 11 forming a magnetic shield around the ring magnet and enclosing the second face 10. The further housing 11 has an end face 14 which continuously surrounds the first face 9 of the ring magnet. The end faces of the housings 4 and 11 are proximate to the respective first faces of the magnet 1 and the ring magnet 8 such that these faces together form a planar magnetically active surface.

主权项

1. A magnetic assembly for applying a magnetic field to a subject, in which the assembly includes:
an inner magnetic body (1) having opposing magnetic poles disposed at respective first and second faces thereof (2, 3); a housing (4) of ferrous metal which forms a magnetic shield around the inner magnetic body enclosing the second face thereof (3) and having an end face (7) continuously surrounding the first face (2) of the inner magnetic body; and a ring magnet (8) which surrounds the housing (4) with opposing magnetic poles disposed at respective first and second faces (9, 10) thereof with the first face (9) surrounding the end face (7) of the housing; the arrangement being such that the end face (7) of the housing (4) is proximate to the respective first faces (2, 9) of the inner magnetic body (1) and the ring magnet (8) such that said faces together form a magnetically active surface of the assembly for placement adjacent to the subject.