Zero indicator for plural scale systems
AssigneeReliance Electric Company
InventorsRoger B. Williams, Jr., Richard C. Loshbough
Life of this patent
Estimating the term…
Abstract
In a plural scale system such as a parts counter having a minor scale for measuring the weight of a known number of sample parts and a major scale for measuring the weight of an unknown number of parts to be counted, apparatus for indicating when the scales are zeroed. Circuitry is provided for automatically correcting the weight outputs from each scale for a limited amount of zero errors. A digital display indicates the corrected weight on one of the scales. When the corrected weight on any of the other scales is on zero, an indicator light associated with such scale is illuminated.
Claims11
Weight measuring apparatus comprising, in combination, at least two scales, each of said scales generating a weight output signal, a digital display, switch means for causing said digital display to selectively indicate the weight output from one of said scales, and means for indicating when the weight output from the other of said scales is zero.
In parts counting apparatus having a major scale for generating an output signal corresponding to the weight of a plurality of parts to be counted, a minor scale for generating an output signal corresponding to the weight of a predetermined number of such parts and means responsive to such weight output signals and to the predetermined number for determining a count of the number of parts on the major scale, apparatus for indicating when said major and minor scales are zeroed comprising, in combination, a digital display, switch means for causing said digital display to selectively indicate the weight output from one of said major and minor scales, and means for indicating when the weight output from said minor scale is zero, said digital display indicating when the weight output from said major scale is zero.
A weight measuring apparatus comprising, in combination, at least two scales, each of said scales being adapted to generate a weight output signal, a digital display, switching means for applying the weight output signal of one of said scales to said display when said switching means is in a first state and for applying the weight output signal from another one of said scales to said display when said switching means is in a second state, and means for visually indicating the existence of a zero weight condition in one of said scales when the weight output signal from another of said scales is being applied to said digital display.
Dependencies are inferred from the claim text.