Dynamic magnetic information storage or retrieval – Head – Core
Patent
1987-10-30
1990-01-16
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Core
360121, 360122, G11B 5127, G11B 517
Patent
active
048947369
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: 2702835 (1955-02-01), Camras
patent: 2939920 (1960-06-01), Leilich
patent: 3334192 (1967-08-01), Camros
patent: 3542971 (1970-11-01), Willard
patent: 3673353 (1972-06-01), Tieman et al.
patent: 4156882 (1979-05-01), Delagi et al.
Journal of the Audio Engineering Society, vol. 24, No. 7, Sep. 1976, "New Wear-Resistant Permalloy Material for Magnetic Recording-Head Application", by Steven A. Bendson, pp. 562-567.
Ampex Corporation
Hecker Stuart N.
Lange Richard P.
Severin David J.
Thibault Harry G.
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