Weighing scales – Computer – Electrical
Patent
1981-03-30
1983-03-01
Miller, Jr., George H.
Weighing scales
Computer
Electrical
177164, 177206, 177211, G01G 1904
Patent
active
043752438
ABSTRACT:
An electronic scale is provided with two or more load cells in which the first load cell covers a low load range, and each successive cell covers a greater load range than the preceding cell. The cells are connected mechanically in tandem such that a load on the scales is applied to each cell simultaneously. Electrical signals from each load cell when performing a weighing operation are processed by a microcomputer to digitize the signals and to select the signal coming from the first load cell in the tandem connection which is not overloaded. The microprocessor scales the measurement signal and displays the weight on an alphanumeric readout. Memory circuits are included for storing tare weights and for storing unit weights during counting operations. When a number of units in a group is to be counted, the microprocessor divides a measured weight by the unit weight and outputs the count to the alphanumeric readout display. A low profile of the tandem load cell arrangement is obtained by the use of Z-brackets or L-brackets to provide the mechanical interconnections. All switching of ranges is done automatically by the microprocessor without attention of the user.
REFERENCES:
patent: 3700055 (1972-10-01), Gaulier
patent: 3994161 (1976-11-01), Trozera
patent: 4219089 (1980-08-01), Gard et al.
patent: 4307787 (1981-12-01), Raboud et al.
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