Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-05-15
1991-04-02
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
360121, 360127, G11B 542
Patent
active
050036882
ABSTRACT:
A magnetic head core including two ferrite blocks which are bonded together so as to form a magnetic path and which includes respective two protrusions protruding from the opposed surfaces thereof. The protrusions have opposed end faces cooperating with each other to define a magnetic gap therebetween. The opposed surfaces of the two ferrite blocks cooperate with the two protrusions, to define two cutouts formed on opposite sides of the magnetic gap, such that a spacing provided between the opposed surfaces by each cutout is larger than an amount of the magnetic gap. The cutouts define an effective width of a track of the head core in which the magnetic gap is open. Each protrusion has two side surfaces inclined at an angle of 25.degree.-75.degree. with respect to its end face. Each cutout is defined by at least one pair of opposed ridges which are formed on the opposed surfaces of the two ferrite blocks, respectively, such that each ridge is disposed on each side of a corresponding one of the two protrusions.
REFERENCES:
patent: 3798758 (1974-03-01), Stamers et al.
patent: 4837922 (1989-06-01), Toriu et al.
Matsuzawa Soichiro
Shimizu Masataka
Terada Nobuhiro
Hall Carl E.
NGK Insulators Ltd.
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