Magnetic head

Details Magnetic head Magnetic head

1986-10-16

1988-10-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Read only detector using light for reading magnetically...

360113, 360122, 360123, G11B 512, G11B 522

Patent

active

047775530

ABSTRACT:
A magnetic head for reading-out information magnetically recorded on a magnetic recording medium in a waveform varying between two different phases. The magnetic head includes at least one block of high magnetic permeability disposed adjacent to and directly facing a surface of the magnetic recording medium to be read-out so as to provide a magnetic path for passing therethrough magnetic flux emanating from the magnetic record on the magnetic recording medium. A magnetic material member is disposed adjacent to the at least one block so as to cause the magnetic flux emanating from the magnetic record on the magnetic recording medium to pass therethrough and is responsive to transition of the magnetic flux corresponding to variation from one phase to another phase in the waveform representing the recorded information so as to provide a predetermined physical effect. Further, a detecting arrangement is provided for the detecting the predetermined physical effect.

REFERENCES:
patent: 4371905 (1983-02-01), Valstyn et al.
patent: 4571653 (1986-02-01), Suzuki et al.
patent: 4609961 (1986-09-01), Jacobs
patent: 4635153 (1987-01-01), Shimamura et al.
patent: 4639810 (1987-01-01), Sakai
patent: 4654837 (1987-03-01), Browder
patent: 4677512 (1987-06-01), Akiyama et al.

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