Metal working – Method of mechanical manufacture – Electrical device making
Patent
1988-10-26
1990-04-17
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
360121, 360127, G11B 542
Patent
active
049168029
ABSTRACT:
A magnetic head core consisting of a plurality of core elements of ferrite which are butted and bonded together into a generally ring-shaped structure by means of a solid-solid reaction at the abutting surfaces. A magnetic gap is defined by opposed surfaces of the two core element, at one end of the core. In producing the core from a pair of core elements, at least one of the core elements is subjected to grinding or chemical etching to remove stock to form the magnetic gap when the elements are assembled, and a groove is formed in at least one of the core elements. The two core elements are then butted together with the groove located internally to form a coil-winding aperture between the two elements, and such that the opposed surfaces of the elements define the magnetic gap. The butted core elements are then heated to bond them at the abutting surfaces by means of a solid-solid reaction.
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Hall Carl E.
NGK Insulators Ltd.
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