System for adjusting tension in a tape

Details System for adjusting tension in a tape System for adjusting tension in a tape

1992-06-24

1994-05-17

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7314, 360 963, G11B 1548

Patent

active

053133455

ABSTRACT:
A system for adjusting the tension of a tape in a magnetic tape record/playback device includes a feed spool, a take-up spool and a motor for feeding the tape between the spools in a forward direction and a reverse direction. A tension sensor senses the tension in the tape as the tape is fed in the forward direction. The tension sensor is locked in its last existing position when the tape direction is changed from the forward direction to the reverse direction. A slip coupling applies a pre-adjusted tension to the tape when the tape is fed in the reverse direction.

REFERENCES:
patent: 4510534 (1985-04-01), Maeda
patent: 4649441 (1987-03-01), Louth
patent: 4706139 (1987-11-01), Maeda
patent: 4786992 (1988-11-01), Tajima et al.
patent: 4801853 (1989-01-01), Lewis et al.
patent: 4945426 (1990-04-01), Okamoto et al.
The Art of Electronics, Horowitz & Hill 1983 UK & US pp. 598,599.
Telefunken Data Book 1976 p. 225 CNY36, CNY37 Opto Couplers.
Digi-Key Catalog 1993 pp. 91 & 94, Opto Isolators.
SGS Data Book 1987 pp. 75-79. Power Operational Amplifier Fig. 9 shows motor drive.
Kybott "Video Tape Recorders" 1978 pp. 102-103 especially Figure 6-32.

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