Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1996-06-14
1997-09-09
Krishnan, Aditya
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
H01F 702
Patent
active
056660979
ABSTRACT:
A magnetizer for use in forming periodic magnetic fields is provided which utilizes two magnet structures which are coaxially aligned with one another. Two stages of magnetic cores are inserted into a gap between the two magnet structures. The stages of magnetic cores each have an upper and lower portion, each portion of which has grooves and ridges which mirror each other. The two different stages of magnetic cores are fabricated such that the respective grooves and ridges are offset and the grooves and ridges of one stage of magnetic core opposes the grooves and ridges, respectively, of the other stage of magnetic core. The two stages of magnetic cores can be active or passive magnetic material. In operation, the two magnetic structures form a uniform transverse magnetic field which passes through a working cavity of the magnetizer. When the two different stages of magnetic cores are inserted into the cavity, the flux from the transverse magnetic field is directed through the ridges of the first stage of magnetic core to magnetize a work piece, which is inserted between a gap in the two different stages of magnetic cores, and then when the first stage is replaced with the second stage of magnetic core, the flux is alternately directed in an opposite direction so that the closely spaced magnetic fields in which the work piece is displaced do not cancel each other.
REFERENCES:
patent: 5382936 (1995-01-01), Leupold et al.
patent: 5428335 (1995-06-01), Leupold et al.
H.A. Leupold et al, "Adjustable Multi-Tesla Permanent Magnet Field Source IEEE Transactions on Magnetics, vol. MAG-29, No. 6, p. 2902 (1993) .
Anderson William H.
Krishnan Aditya
The United States of America as represented by the Secretary of
Zelenka Michael
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