Two frequency coded data interpreting method and apparatus

Details Two frequency coded data interpreting method and apparatus Two frequency coded data interpreting method and apparatus

1975-02-03

1976-07-13

Sloyan, Thomas J.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

G06K 700

Patent

active

039696138

ABSTRACT:
An improved method and apparatus are disclosed for the reading (or sensing) and decoding of two frequency "bar coded" or transition coded sensible data. The data may take the form of indicia recorded on various media or it may be transmitted on a communications channel. The method and apparatus include means for simultaneously or separately accommodating both variable velocity scan (or distorted reception) conditions and non-uniform bar widths in the coded data or other variations in the spacing of transition signals in the recorded indicia. Frequency variations in transmitted data signals can also be accommodated. Hand held sensor or "wand" scanning of coded tangible indicia-bearing media is facilitated for either optically or magnetically recorded data indicia. Correct interpretation of frequency-distorted transmitted data is also made possible.

REFERENCES:
patent: 3235855 (1966-02-01), Woo
patent: 3623040 (1971-11-01), Erickson et al.
patent: 3701097 (1972-10-01), Wolff
patent: 3711843 (1973-01-01), Galvagni et al.
patent: 3727202 (1973-04-01), Fort
patent: 3737632 (1973-05-01), Barnes
patent: 3750108 (1973-07-01), Jensen
patent: 3805175 (1974-04-01), Nassimbene
patent: 3811033 (1974-05-01), Herrin et al.

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