Data filtering circuitry
AssigneeReliance Electric Company
InventorsEdward G. Pryor, Richard C. Loshbough
Life of this patent
Estimating the term…
Abstract
Improved apparatus for weighing and computing a value for articles. An integrated circuit microcomputer is supplied with the gross article weight from a scale and with price per unit weight data from a manual keyboard. Tare weight data may be entered either through the manual keyboard or automatically from the scale. The microcomputer computes a net weight and a value for each weighed article. The net weight, the price per unit weight and the value are indicated on a digital display and may be printed on a label. Filtering circuitry prevents jitter in the article weight supplied from the scale to the microcomputer and the display caused by small vibrations in the article or the scale.
Claims4
A digital weighing scale comprising, in combination, means for generating a digital weight signal corresponding to the weight of an article, memory means for storing a filtered weight, a counter, means for periodically comparing the generated weight signal with the stored filtered weight, means responsive to a comparison between the generated weight signal and the stored filtered weight for clearing said counter, means responsive to the generated weight signal deviating from the stored filtered weight by a weight less than a predetermined amount for incrementing said counter, and means responsive to a predetermined count in said counter for storing the generated weight signal in said filtered weight memory means.
Dependencies are inferred from the claim text.