Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent
1980-11-19
1982-10-05
Faber, Alan
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Mechanical modification or sensing of storage medium
369146, 369149, H04R 1112
Patent
active
043531253
ABSTRACT:
A stereophonic electromagnetic pickup cartridge in which each of the right- and left-channel yokes is formed by folding a thin strip of a magnetic material over itself many times like pleats into a U-shape; coils are mounted on the yokes; the bases of the yokes are crossed so that the bases of the yokes are respectively disposed along the lines which are crossed by 90.degree. respectively with the axes of the maximum sensitivity of the right- and left-channels are formed; and an armature is disposed at the open ends of the yokes. Mass production at less costs of high-quality yokes with minimum eddy current loss becomes possible.
REFERENCES:
patent: 3077522 (1963-02-01), Gunter
patent: 3356795 (1967-12-01), Shaper
patent: 4140886 (1979-02-01), Itoh
patent: 4251695 (1981-02-01), Ono
Itoh Masashi
Teramae Kazuo
Faber Alan
Matsushita Electric - Industrial Co., Ltd.
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