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1. US4751661 - Automatic zero balancing of a weighing apparatus

Office
United States of America
Application Number 06868926
Application Date 27.05.1986
Publication Number 4751661
Publication Date 14.06.1988
Grant Number 4751661
Grant Date 14.06.1988
Publication Kind A
IPC
G01G 19/04
GPHYSICS
01MEASURING; TESTING
GWEIGHING
19Weighing apparatus or methods adapted for special purposes not provided for in groups G01G11/-G01G17/138
02for weighing wheeled or rolling bodies, e.g. vehicles
04for weighing railway vehicles
G06F 15/20
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
15Digital computers in general; Data processing equipment in general
20Design or construction of the computing part, adapted to a specific application
G01G 23/00
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
G01G 23/01
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
01Testing or calibrating of weighing apparatus
G01G 23/18
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
18Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
G01G 23/37
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
18Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
36Indicating the weight by electrical means, e.g. using photoelectric cells
37involving digital counting
CPC
G01G 23/01
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
01Testing or calibrating of weighing apparatus
G01G 23/3707
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
18Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
36Indicating the weight by electrical means, e.g. using photoelectric cells
37involving digital counting
3707using a microprocessor
Applicants NCR Corporation
Inventors Amacher Gene L.
Mathes Gene R.
Paugstat John E.
Agents Hawk Wilbert
Sessler Albert L.
Lavin Richard W.
Title
(EN) Automatic zero balancing of a weighing apparatus
Abstract
(EN)

A method for automatically zero balancing an electronic scale includes disabling the display from displaying a "Scale Ready" logo, taking a number of readings from the scale when no weight is placed on the scale, obtaining an average reading for a zero weight condition of the scale by dividing the sum of the readings by the number of readings taken, detecting when two consecutive average readings are within a first predetermined limit, enabling the display to display the "Scale Ready" logo indicating the scale is ready for a weighing operation, taking a number of readings from the scale in response to the displaying the scale ready logo, blanking the display when the readings taken are not within a predetermined value of the zero balance readings, and removing the scale lid from the scale and cleaning the scale to remove dirt or other impediments from the scale in response to the blanking of the display.