Registers – Coded record sensors – Particular sensor structure
Patent
1986-04-11
1988-06-14
Pitt, Harold I.
Registers
Coded record sensors
Particular sensor structure
235474, G06R 710
Patent
active
047513756
ABSTRACT:
A bar code reader system includes a stream of pulses whose period is a function of the scan speed of the reader as it scans the bars and spaces of a bar code symbol. Transition pulses are supplied which identify the boundaries of the bars and spaces. The tach pulses which occur between transition pulses are counted, loaded into memory, and are read from memory via microprocessor means, whereby the widths of the bars and spaces are determined. The sequence of the bar and space data is decoded to yield the bar code encoded numbers.
REFERENCES:
patent: 3991299 (1976-11-01), Chapima
patent: 4251798 (1981-02-01), Swartz
patent: 4554445 (1985-11-01), Chasse
Almeida George B.
Ampex Corporation
Lange Richard P.
Pitt Harold I.
Talcott Joel D.
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