Device for detecting a non-recorded segment on magnetic tape

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

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Details

360 721, 360 744, G11B 2722, G11B 1910, G11B 1552

Patent

active

044046049

ABSTRACT:
A device for accurately detecting non-recorded segments on a magnetic tape in fast-forward and rewind modes. The output of a magnetic head is coupled through an equalizer amplifier and limiter amplifier to convert it to a digital pulse signal which is applied to the clear input of a counter the clock input of which is coupled to an oscillator. A higher order output bit is connected to the clock input of a flip-flop which controls solenoids for setting the fast-forward and rewind modes. When no pulses of the digital pulse signal are received within a predetermined period, indicative of the presence of a non-recorded segment, the counter produces an output signal which operates the flip-flop.

REFERENCES:
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patent: 3461249 (1969-08-01), Kamoji et al.
patent: 3573393 (1971-04-01), Blackie et al.
patent: 3893177 (1975-07-01), Takenaka
patent: 4151566 (1979-04-01), Ohrman
patent: 4270152 (1981-05-01), Ida
patent: 4288823 (1981-09-01), Yamamoto et al.
patent: 4290090 (1981-09-01), Yamamoto et al.
patent: 4323935 (1982-04-01), Koizumi et al.

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