Registers – Coded record sensors – Particular sensor structure
Patent
1993-10-18
1995-05-30
Shepperd, John
Registers
Coded record sensors
Particular sensor structure
235436, 235470, 235494, G06K 710, G06K 700, G06K 1906
Patent
active
054204097
ABSTRACT:
A method is disclosed for the reading graphical indicia that are encoded in accordance with a multidimensional symbology. The indicia are repeatedly scanning a signal representative of a pattern thereof until sufficient information is recognized to assure a valid reading operation. The signal, or a memorized representation thereof is decoded to obtain character information from code words of the indicia. A first value is assigned to each newly recognized character, and a second value is assigned to each character that was recognized in a preceding scan of the indicia. The first and second values are respectively cumulated into first and second sums. A function of the first sum and the second sum is computed, an audible click produced whenever a predetermined value of the function has been attained. The first and second sums are then reset. The rate of clicks informs the user of the progression of the reading operation. An auxiliary audible indicator, such as pitch, can be varied to inform the user of the cumulative progress of the scan.
REFERENCES:
patent: 4866257 (1989-09-01), Ellott et al.
patent: 5034598 (1991-07-01), Poland
patent: 5235167 (1993-08-01), Dvorkis et al.
patent: 5243655 (1993-09-01), Wang
Hussey Robert M.
Longacre Jr. Andrew
Lee Michael G.
Shepperd John
Welch Allyn Inc.
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