Electromagnetic transducers having E-shaped cores and shielding

Details Electromagnetic transducers having E-shaped cores and shielding Electromagnetic transducers having E-shaped cores and shielding

1989-11-09

1991-02-26

Severin, David J.

Dynamic magnetic information storage or retrieval

Head

Plural gaps

360118, 360122, G11B 5265, G11B 5115

Patent

active

049966200

ABSTRACT:
A magnetic transducer of the erasing type, in which the coil is pre-wound to achieve greater manufacturing economy; and in which for the same reason, and also for electromagnetic operating efficiency, the core is laminated with each lamination being of one-piece fabrication. However, the single transducing gap in the core is too small to permit threading the coil thereon. Therefore, the core is formed of flexible material so that the gap can be enlarged to accept the coil during assembly. Alternatively, the core can be fabricated initially with an enlarged gap, and the flexible core is then bent to provide a desired gap length after the coil is assembled thereon. A variational form of the invention has two erase gaps and one record-play gap with a separate coil therefor.

REFERENCES:
patent: 3526725 (1970-09-01), Camras
patent: 3969771 (1976-07-01), Suzuki et al.
patent: 4291352 (1981-09-01), Gooch
patent: 4758917 (1988-07-01), Gooch
patent: 4787002 (1988-11-01), Isozaki

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