Tape tension control for tape recording and/or reproducing syste

Details Tape tension control for tape recording and/or reproducing syste Tape tension control for tape recording and/or reproducing syste

1977-11-30

1980-08-19

Dobeck, B.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318338, 318493, H02D 532

Patent

active

042186390

ABSTRACT:
A purely electrical tension control system utilizing the characteristics of a shunt motor coupled with the supply reel. In a recording or reproducing mode, the reel drive motor is forced to rotate in a direction opposite to its normal direction of rotation, thus producing a counter electromotive force and torque for rotation. The counter electromotive force is detected and employed to control the motor torque to thereby maintain a fixed tape tension.

REFERENCES:
patent: 2719419 (1955-10-01), Fleckenstein
patent: 2964691 (1960-12-01), Dinger
patent: 3221237 (1965-11-01), Kalenian
patent: 3345457 (1967-10-01), MacLeod
patent: 3419777 (1968-12-01), Asseo
patent: 3466522 (1969-09-01), Cushing, Jr.
patent: 3800196 (1974-03-01), Zimmermann
patent: 3876168 (1975-04-01), Powers, Jr.
patent: 4037144 (1977-07-01), Ohmae et al.
patent: 4079301 (1978-03-01), Johnson

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