Patent ID: 8256098
Filing Date: 2012-09-04
Classification: H01F,Y10T

Abstract:
1. A method for making a switchable core element-based permanent magnet apparatus for holding and lifting a desired target comprising the steps of: Providing for two core elements, separated from each other by an air gap or low friction material for the purpose of reducing the friction and facilitating the rotation between said core elements, each of which is comprised of one or more permanent magnets, and each of which is contained within a carrier platter, each permanent magnet having a magnetic north and south pole creating a magnetic north pole field and a magnetic south pole field, respectively, and two magnetically soft pole conduits, the magnetic poles of the permanent magnet or magnets each having a magnetic pole face and each being adjacent and affixed to the two magnetically soft pole conduits, said magnetically soft pole conduits being capable of containing and redirecting the magnetic field of the permanent magnet or magnets and oriented such that the magnetic north pole or poles of the permanent magnet or magnets are adjacent and affixed to one pole conduit and the magnetic south pole or poles of the permanent magnet or magnets are adjacent and affixed to the other pole conduit, a contact surface area defined by that surface area in which the permanent magnet or magnets touch the pole conduit, a work surface contact area defined by that surface in which the pole conduit comes into contact with a magnetic target, wherein: a. Said pole conduits are matched to the permanent magnet or magnets to efficiently produce a north pole conduit (N) magnetic field and a south pole conduit (S) magnetic field while simultaneously conducting the magnetic field to the upper and lower surfaces of the core element, by: b. Verifying that the matched core elements deactivate when the pole conduits are anti-aligned, that is, the majority if not all of the magnetic field emanating from the work surface contact area is neutralized, the core elements positioned such that the south pole conduit (S) of a first core element is juxtaposed with the north pole conduit (N) of a second adjacent core element and the north pole conduit (N) of the first core element is juxtaposed with the south pole conduit (S) of the second core element (S-N/N-S, and adjusting if necessary one or more core element's magnetic field strength to further neutralize the magnetic field emanating from the work surface contact area due to assembly or manufacturing requirements that may adversely affect the efficiency of the pole conduits' ability to conduct and redirect the north and south pole magnetic fields between adjacent core elements, by: c. Incorporating each of the two core elements into a separate carrier platter wherein each carrier platter constrains or holds the individual core element components such that the north and south pole conduits of the core elements are radially opposed in the same flat surface horizontal planes as the carrier platter, while providing for the orientation of adjacent core elements by: d. Combining the two carrier platters so that each carrier platter is vertically constrained to the carrier platter adjacent to it so that each carrier platter may rotate concentrically with respect to the carrier platter adjacent to but may not move non-concentrically with respect to the carrier platter adjacent to it, said carrier platters containing optional rotation limit features which facilitate alignment or anti-alignment of the north and south pole conduits contained within the adjacent carrier platters wherein: