Self clocking speed tolerant magnetic recording method and appar

Details Self clocking speed tolerant magnetic recording method and appar Self clocking speed tolerant magnetic recording method and appar

1978-02-23

1979-10-30

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

235482, 235493, G11B 509

Patent

active

041730267

ABSTRACT:
In the disclosed method, pre-recorded bit markers are read from a magnetic medium as it is moved by hand at a highly variable speed past a magnetic read head. Pulses of a fixed frequency are counted between the reading of adjacent ones of the bit markers. Magnetic flux is written in one direction on the medium upon the reading of the bit markers; and magnetic flux is written in an opposite direction after a time period equal to a fraction of the number of pulses counted between bit markers times the reciprocal of the fixed frequency. Also disclosed is apparatus for performing the steps of the disclosed method.

REFERENCES:
patent: 3737632 (1973-06-01), Barnes
patent: 3864754 (1975-02-01), Miklos et al.
patent: 3959816 (1976-05-01), Spiecens
patent: 4032915 (1977-06-01), Shanks et al.

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