Price labeling system with floating zero reference

Details Price labeling system with floating zero reference Price labeling system with floating zero reference

1976-05-03

1977-09-20

Hartary, Joseph W.

Weighing scales

Computer

Electrical

177145, 177165, 23515133, G01G 1104

Patent

active

040490688

ABSTRACT:
A price labeling system employs a highly linear weight-responsive transducer. Two weight measurements are taken with respect to each incoming article, one representing the unladen weight of the scale platform and the other representing the laden weight of the scale platform. Data representing these two measurements are subtracted to provide gross weight of the article and thereby relieving the system of the need to provide a stable "zero" reference when the scale is unladen. The data representing the outputs of the transducer are expanded in range, are subtracted and are divided by the range expansion factor to provide decreased uncertainty in resolution of the analog-to-digital conversion of the transducer outputs. A central processing unit computes the net weight and price of the article on the basis of tare weight and price per pound entries.

REFERENCES:
patent: 2974863 (1961-03-01), Williams
patent: 3375357 (1968-03-01), Dekker
patent: 3853267 (1974-12-01), Cadwell
patent: 3977484 (1976-08-01), Kammerer

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