Dynamic magnetic information storage or retrieval – General recording or reproducing
Patent
1977-01-26
1978-10-17
Lucas, Jay P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
360 27, 360 71, 360 79, G11B 1502, G11B 2318
Patent
active
041212649
ABSTRACT:
A first main information signal is recorded in a first track extending longitudinally along one side of a length of magnetic tape and a corresponding first secondary, or control, signal is recorded in a narrow parallel track spaced from the first main track. A second main signal is recorded in a third track within the other half of the tape, and a corresponding second secondary, or control, signal is recorded between the first secondary signal and the first main signal, whereby the two main signals and the two secondary signals are interleaved with each other. The first and second main tracks are equal in width, and the first and second secondary tracks are also equal in width but are much narrower than the first and second main tracks. If desired, the first and second main tracks can each be divided into first and second sub-main tracks to permit two channel recording with a control track in each direction but with each control, or secondary, track being separated from its own nearest subtrack by a distance equal to the width of the other secondary track plus two guardbands, one on each side of the other secondary track.
REFERENCES:
patent: 3292168 (1966-12-01), Gray
patent: 3469037 (1969-09-01), Camras
patent: 3539734 (1970-11-01), Tsuchiya
patent: 3587180 (1971-06-01), Richt
patent: 3591730 (1971-07-01), Chang
patent: 3702908 (1972-11-01), Sugiura
patent: 3812533 (1974-05-01), Kimura
patent: 3869720 (1975-03-01), Ohira
patent: 3919697 (1975-11-01), Walker
Sound Recording - John Eargle; Van Nostrand Reinhold Co.; New York 1976, Standards shown on p. 230ff.
"Reel to Reel Cassette," Radio Electronics Magazine, p. 48ff, Oct. 1976.
Kishi Yoshio
Nagami Masaru
Eslinger Lewis H.
Lucas Jay P.
Sinderbrand Alvin
Sony Corporation
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