Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1975-08-07
1977-08-23
Kilgore, Robert M.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
2091115, 250568, 235 6111E, 235 6112N, 358160, G06K 712, H04N 700, G06K 1906, B07C 534
Patent
active
040442276
ABSTRACT:
A compact, self-clocking bar code has a multi-width acquisition bar and a plurality of contiguous data spaces. Data bars occupy selected data spaces to define a code. The bar code is emplaceable on an article or label for identification or other purposes. Scanning means redundantly line scan across the bars and produce a video signal having an amplitude pattern corresponding to the scanned bar code. A decoder includes window logic confining video processing to a read window in the video field in which the scanned bar code is to appear. The decoder includes a high frequency clock circuit and means initially processing, or "digitizing", the raw video signal. A strobe circuit incorporates a side loading up-down counter which initially counts and stores clock pulses in proportion to the scanned width of the acquisition bar. The counter repetitively counts from the stored count down to zero to provide a series of strobe pulses which are to coincide with scanning beam movement across the centers of the data spaces in the bar code during a given scan line. Detector circuitry compares the video amplitudes coincident with the series of strobe pulses, with a stored reference code, and when same match, provides a "compare" output. Compare pulses for each of a preselected number of successive scan lines across the bar code indicate that the bar code is the proper one. A color CCTV monitor displays in different colors the read window, the scanned bar code, strobe lines marking data space centers, and so forth. Modifications include an increase in characters represented by a bar code without increase in bar code size, and use of low persistence or high persistence monochromatic scanning devices.
REFERENCES:
patent: 3409129 (1968-11-01), Sperry
patent: 3414731 (1968-12-01), Sperry
patent: 3519145 (1970-07-01), MacDonald
patent: 3553438 (1971-01-01), Blitz
patent: 3562494 (1971-02-01), Schmidt
patent: 3628014 (1971-12-01), Grubic
patent: 3663801 (1972-05-01), Wahli
patent: 3719777 (1973-03-01), VON Reichenbach
patent: 3763351 (1973-10-01), Deerhake
patent: 3777165 (1973-12-01), Bryant
patent: 3794812 (1974-02-01), Bryant
patent: 3806706 (1974-04-01), Hasslinger
patent: 3838251 (1974-09-01), Herrin
patent: 3854035 (1974-12-01), Tyler
patent: 3862400 (1975-01-01), Thompson
patent: 3882301 (1975-05-01), Nassimbene
patent: 3916154 (1975-10-01), Hare
Dudley Ronald J.
Holm James P.
Kilgore Robert M.
The Upjohn Company
LandOfFree
Bar code reader does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bar code reader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar code reader will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2316739