Apparatus for automatically magnetizing permanent magnet bodies, measuring their magnetic retentivity and sorting them
AssigneeElektro-Physik Hans Nix & Dr. -Ing. Erich Steingroever KG
InventorErich Steingroever
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Abstract
An elongated generally U-shaped ferromagnetic yoke has a series of coils embedded in its leg portions at spaced positions along its length so that a magnet body can be moved along the length of the air gap of the yoke so that that it can be magnetized and measured for a magnetic characteristic. A conveyor and a sorting device are also included so that magnet bodies exceeding minimum standards can be selected automatically. Other functions, such as partial demagnetization, and complete demagnetization, can be accomplished by other coils, or permanent magnets, embedded in the yoke.
Claims27
In apparatus for automatically testing and selecting permanent magnet bodies having oppositely facing pole surfaces, the combination comprising generally U-shaped ferromagnetic yoke means having opposed inner pole surfaces defining an elongated air gap of uniform width within which gap magnet bodies may be received, circuit means for said yoke means including means for generating a magnetizing flux through a magnet body at at least one position along the length of said air gap and including means for measuring a magnetic value of said magnetized magnet body at another position along the length of said air gap, said circuit means also including comparison means responsive to said measuring means for selecting magnet bodies having predetermined values of said measured magnetic characteristic, and conveyor means for moving a magnet body successively to said one position and to said measuring position.
In apparatus for testing permanent magnet bodies having oppositely directed pole surfaces, the combination comprising a generally U-shaped, elongated ferromagnetic yoke means, the two projecting leg portions of said yoke means defining a uniform air gap along the length thereof, with a plurality of controllable transverse flux paths through the air gap defined by the leg portions of said yoke means at spaced positions along the length thereof, at least one of said flux paths including a coil means embedded in at least one of said leg portions, and one of said transverse flux paths including magnetic field measuring means.
Dependencies are inferred from the claim text.