Patent ID: 7656265

Claim:
An apparatus for establishing a magnetic circuit; the apparatus comprising: (a) a first magnetically conductive element; the first element being generally symmetrical with respect to an axis and extending from a first locus to a second locus; and (b) a second magnetically conductive element coupled with the first element at the second locus and establishing a return magnetic path from the second locus toward a plane generally perpendicular with the axis and containing the first locus; the return magnetic path being distributed substantially in spaced relation with the first element generally symmetrically about the axis; at least one additional first magnetically conductive element generally symmetrical with respect to the axis and extending from the first locus to the second locus, and at least one additional second magnetically conductive element coupled with at least one of the at least one additional first magnetically conductive element; each respective additional second magnetically conductive element of the at least one additional second magnetically conductive element establishing a respective additional return magnetic path from the second locus toward the plane; each additional return magnetic path being distributed substantially in spaced relation with at least one selected additional first element of the at least one additional first element; each additional return magnetic path being established generally about the axis.