Magnetic head devices enclosed by a shield having superposed lay

Details Magnetic head devices enclosed by a shield having superposed lay Magnetic head devices enclosed by a shield having superposed lay

1974-02-21

1976-08-17

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360103, 360122, 360124, 360129, G11B 511, G11B 522, G11B 548

Patent

active

039757714

ABSTRACT:
In magnetic disk equipments or the like, the read/write magnetic heads are each bonded to the wall of a thru-hole of a carrier plate adapted to act as a "flying" member maintained by an aerodynamical action in close proximity to the surface of the rotating disk. In a device according to the invention, the bond between the lateral surface of the head and said wall is made to ensure magnetostatic and electrostatic shielding of the head against spurious magnetic, electromagnetic and electrostatic fields. Said bond may comprise thin films of a high permeability anisotropic material coating at least the facing surfaces of the head and the wall and a layer of solder intervening between said films. Such a shield may partially extend over selected areas of the rear faces of the plate and head.

REFERENCES:
patent: 2846517 (1958-08-01), Farrand et al.
patent: 3234338 (1966-02-01), Foster et al.
patent: 3562444 (1971-02-01), Hoogendorn et al.
patent: 3678211 (1972-07-01), Hoogendorn et al.
IBM Technical Disclosure Bulletin, Shielding Method, D. W. Brede et al., vol. 12, No. 7, Dec. 1969, p. 958.
W. D. Kehr et al., Making Electromagnetic Shields Including Ferrite, IBM Technical Disclosure Bulletin, vol. 15, No. 8 Jan. 1973, p. 2508.

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