Tape timer for tape recorder/reproducer

Details Tape timer for tape recorder/reproducer Tape timer for tape recorder/reproducer

1982-04-02

1984-09-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360 70, 360137, G11B 1518

Patent

active

044713916

ABSTRACT:
An improved tape timer is achieved by using pulses generated by a control track previously recorded on magnetic tape to determine the magnitude of phase shift between said control track pulses and pulses generated by a mechanical tachometer in contact with the magnetic tape. The pulses generated by said mechanical tachometer are counted and said counting sequence used to generate a pulse to up-date a tape timer. In response to a detected phase shift, the count sequence is dynamically adjusted by an amount determined by the magnitude of the phase shift in such a manner as to reduce said phase shift.

REFERENCES:
patent: 3939490 (1976-02-01), Opelt
patent: 4037260 (1977-07-01), Busby, Jr. et al.
patent: 4062048 (1977-12-01), Weber

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