Method of detecting tape transport condition

Details Method of detecting tape transport condition Method of detecting tape transport condition

1977-02-22

1979-11-13

Rubinson, Gene Z.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

318314, 318318, G11B 1532

Patent

active

041740793

ABSTRACT:
A method of detecting tape transport condition, wherein a signal is derived from detector means provided in association with at least one of a pair of spindle reels of a tape recorder to detect the rate of revolution of said spindle, said signal having a frequency proportional to the rate of revolution of said spindle. The signal derived from the detector means is applied to a phase-locked loop, and it is also applied to a synchronism detecting circuit, together with a signal derived from a voltage-controlled oscillator contained in said phase-locked loop. Thus, detection is made with respect to whether or not these two signals agree in frequency with each other.

REFERENCES:
patent: 3647157 (1972-03-01), Chitty
patent: 3695550 (1972-10-01), Lennox
patent: 3908167 (1975-09-01), Hulls et al.
patent: 3922602 (1975-11-01), Lunquist
patent: 3982190 (1976-09-01), Schaefer
patent: 4031466 (1977-06-01), Krause et al.

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