Monitor for visually indicating wear on record media

Details Monitor for visually indicating wear on record media Monitor for visually indicating wear on record media

1986-10-10

1989-01-10

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Recording or reproducing an information signal and a control...

360 25, 360 31, G11B 500, G11B 2736, G01N 2772

Patent

active

047977531

ABSTRACT:
A device for dynamically indicating relative wear in a magnetic tape cartridge in which a specially identifiable signal is recorded on a separate track from that used for normal recording. Upon playback, the specially identifiable signal is recovered and compared with a "clean" reference signal to provide an error signal indicative of the amount of flutter present. The error signal sequentially activates an array of LED's to provide a relative, easily interpreted indication of the amount of flutter and hence of the extent of wear in the tape and cartridge.

REFERENCES:
patent: 3659195 (1972-04-01), Cardozo et al.
patent: 3872504 (1975-03-01), Belcher
patent: 3897379 (1975-07-01), DeFrancesco et al.
patent: 3938184 (1976-02-01), DeFrancesco et al.
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American National Standards Institute Standard S4.3-1972 (IEEE Std. 193-1971).
"A Microprocessor-Based NAB Tape Cartridge Machine with Open Reel Quality" by John C. Fesler, Audio Engineering Society Preprint, 64th Convention, Nov. 2-5, 1979, New York, N.Y. p. 16.

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