Rotation control system

Details Rotation control system Rotation control system

1977-05-31

1978-09-19

Christian, Leonard D.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242 7552, B65H 5938, G03B 102

Patent

active

041148304

ABSTRACT:
In a tape recorder, the rotation of a tape reel is detected and converted to a pulse signal having a repetition frequency proportional to the rotation speed of the tape reel. This pulse signal is supplied to a pair of frequency-voltage converters having different time constants to provide different outputs therefrom. The rotation of the tape reel is controlled by braking the rotation of the tape reel with a force proportional to the difference of the above two outputs.

REFERENCES:
patent: 3806061 (1974-04-01), Kollar et al.
patent: 3849661 (1974-11-01), Beiter
patent: 3854676 (1974-12-01), Fischer et al.

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