Complementary pole coupling magnetic head structure

Details Complementary pole coupling magnetic head structure Complementary pole coupling magnetic head structure

1982-06-15

1984-11-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360122, G11B 512

Patent

active

044854196

ABSTRACT:
An improved generic form of magnetic read head design is described. Several versions of designs for reading the vertical component of magnetization from a recorded magnetic medium, where data is written in the form of magnetic polarity reversals of transitions, are described. All of the designs utilize the principle of coupling of complementary magnetic poles from the medium to the sensor to improve the magnitude of magnetic field experieced by the sensor. All the designs also utilize two coupling legs arranged in vertical relationship to the recording medium. The legs are relatively widely spaced apart to have their ends proximate to complementary magnetic pole transitions on the medium for a given density of data (expressed as flux changes per inch). The other ends of the coupling legs are brought close together to direct the coupled field from the medium through a narrow gap in which a magnetic sensor is located. The coupling legs in the magnetic sensor are oriented relative to one another within this gap area such that the magnetic flux field passes through the most sensitive plane of the sensor.

REFERENCES:
patent: 3887944 (1975-06-01), Bajorek et al.
patent: 4120011 (1978-10-01), Kolb, Jr.
patent: 4123790 (1978-10-01), Moeller et al.
patent: 4164770 (1979-08-01), Jeffers
patent: 4182987 (1980-01-01), Moeller
patent: 4277808 (1981-07-01), Nagaki
IBM/TDB, vol. 17, No. 4, Sep. 1974, pp. 967-968, "Magnetoresistive Read Heads", by Bate et al.
Soviet Inventions Illustrated, Sec. El., Week D 02, Feb. 18, 1981.

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