Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1980-04-02
1982-05-25
Wolff, John H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 721, 360 744, G11B 1518, G11B 1902, G11B 1700
Patent
active
043319866
ABSTRACT:
A tape drive control apparatus and method for a magnetic tape recording and reproducing system are provided to prevent a failure of the read and write operations due to frequent start and stop actions of the magnetic tape. The magnetic tape has a certain resonance frequency between a read/write magnetic head and a tape guide of the system. When the rate of start and stop actions of the tape approaches the resonance frequency adverse vibration of the tape becomes large in magnitude. To prevent such tape vibration delay a delay circuit is provided to delay the start of the magnetic tape for the subsequent data block when the length of the preceding data block is within a predetermined range.
REFERENCES:
patent: 3781490 (1973-12-01), Phillips
patent: 4180839 (1979-12-01), Neff
Hitachi , Ltd.
Wolff John H.
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