Method of manufacturing magnetic head cores

Details Method of manufacturing magnetic head cores Method of manufacturing magnetic head cores

1986-04-23

1988-04-26

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

225 935, G11B 5127

Patent

active

047395486

ABSTRACT:
A plurality of magnetic head cores is cut from a preprocessed ferrite core block having a gap formed by means of a fracture method. To this end the core block is notched on a line along which the gap is to be formed. subsequently the core block is subjected to a load (tensile stress) until it breaks on the line. A non-magnetic material in a liquid form is provided between the fracture faces which are kept at a desired distance from each other until the material has cured. In a preferred method the core block consists of a first sub-block having a series of yokes and a second sub-block bonded thereto to define the winding apertures. This permits use of a high grade ferrite only at the gap, and further permits winding the limbs of the yoke prior to bonding.

REFERENCES:
patent: 2146373 (1939-02-01), Keier
patent: 2836881 (1958-06-01), Pollock
patent: 2864013 (1958-12-01), Wood
patent: 3104455 (1963-09-01), Frost
patent: 3581247 (1971-05-01), Belford et al.
patent: 3797757 (1974-03-01), Marshall
patent: 3807042 (1974-04-01), Braitberg et al.

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