Dynamic magnetic information storage or retrieval – Head – Plural gaps
Patent
1985-02-26
1987-03-24
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Plural gaps
360122, G11B 5265, G11B 5187
Patent
active
046529551
ABSTRACT:
An electromagnetic transducer assembly for a helical-scan type video tape recorder comprises a nonmagnetic base, and a pair of magnetic heads secured to the base and successively arranged in spaced relationship with each other in the direction of transport of a magnetic medium, each of the heads comprising a generally U-shaped core having a pair of limb portions and a web portion therebetween, a generally I-shaped core connected to the limb portions to form a closed magnetic circuit having a magnetic gap therein, and a coil wound on the closed magnetic circuit. The I-shaped cores of the heads respectively have arcuately shaped edge portions adjacent the magnetic gaps and opposed to each other across the space between the heads to eliminate the creation of false magnetic gap effect.
REFERENCES:
patent: 3846819 (1974-11-01), Warren
patent: 3978523 (1976-08-01), Tanaka et al.
patent: 4107751 (1978-08-01), Shimoda
patent: 4393428 (1983-07-01), Fujimura
Patent Abstracts of Japan, vol. 7, No. 216, Sep. 24th, 1983, p. (P-225) (1361); & JP-A-58-111120 (Sony) 02-07-1983.
Nei Atsushi
Niwa Kazuhiro
Tsunekawa Masaharu
Bowler Alyssa H.
Hecker Stuart N.
Victor Company of Japan Ltd.
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