Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1979-12-14
1984-07-17
Wolff, John H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 721, G11B 1518, G11B 1900
Patent
active
044609310
ABSTRACT:
A control apparatus for a recording/playback system using an endless recording medium having a position detecting mark attached thereto and driven at a given speed to move along an endless loop, wherein the position detecting mark is detected as the recording medium is driven and a mark position signal generated to indicate each passage of the mark passed a predetermined point in the endless loop. Recording or playback operation is controlled based on the time between detection of successive mark position signals which is indicative of the one-cycle length of the recording medium. The one-cycle length of the endless recording medium is stored as data which may be changed upon changing of the tape length and/or the tape speed. Once the one-cycle length data is stored, automatic recording may be started from any position on the endless recording medium at any time.
REFERENCES:
patent: 3621152 (1971-11-01), Billings
patent: 3909537 (1975-09-01), Jacobson
patent: 4104487 (1978-08-01), Jacobson
Tokyo Shibaura Denki Kabushiki Kaisha
Wolff John H.
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