Cross-coupled servo control mechanism for reel-to-reel tape driv

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record

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242186, 242203, 318327, 360 722, G11B 1546, G11B 1920

Patent

active

043706835

ABSTRACT:
The tape transport mechanism, in a tape drive for retrievable informational data storage, is provided with a cross-coupled tape speed control servomechanism, achieving controlled bidirectional movement and stopping of tape, without switching, and requiring only one polarity of power source for the motive elements.

REFERENCES:
patent: 3764087 (1973-10-01), Paananen et al.
patent: 3913134 (1975-10-01), Sargunar
patent: 3984868 (1976-10-01), Ragle et al.
patent: 4015799 (1977-04-01), Koski et al.
patent: 4091314 (1978-05-01), Johnson
patent: 4156257 (1979-05-01), Roberts
patent: 4157488 (1979-06-01), Allan
IBM Tech. Disc. Bull., E. P. Kollar et al., Reel-to-Reel Tape Unit With Decreased Acceleration Time, vol. 14, No. 8, Jan. 1972, pp. 2331-2332.
IBM Tech. Disc. Bull., R. L. Colburn et al., Bidirectional PWM Motor Speed Control, vol. 14, No. 2, Jul. 1971, pp. 388-389.
IBM Tech. Disc. Bull., J. A. Weidenhammer, Electrical Differential Tape Drive Systems, vol. 12, No. 11, Apr. 1970, p. 1805.

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