Digital weight measuring and computing apparatus with automatic

Details Digital weight measuring and computing apparatus with automatic Digital weight measuring and computing apparatus with automatic

1975-04-30

1976-10-12

Smith, Jerry

Registers

Transfer mechanism

Traveling pawl

177 25, 177165, G06F 1506, G06F 1520, G01G 19413

Patent

active

039860124

ABSTRACT:
This invention relates to an improved digital weight measuring and computing apparatus with automatic zero correction which automatically corrects the zero indication of the apparatus.
The weight measuring apparatus comprises a scale which employs a load cell and strain gauge to develop an analog voltage representing the weight on the scale. An analog-to-digital converter is then employed to change the analog voltage into a digital representation of the load on the scale. The digital converter provides a digital indication in addition to the digital indications employed to indicate the weight on the scale. The additional digital indication represents fractions of the least weight increment indicated of the weight on the scale. The additional digital indication is then employed to control the generation of a zero correction factor and this factor is then combined with the weight indications from the scale to indicate the correct weight of articles placed on the scale. The corrected weight in combination with the unit price of the article placed on the scale is then employed to compute the value of the article on the scale.

REFERENCES:
patent: 3439524 (1969-04-01), Rogers
patent: 3548181 (1970-12-01), Fisher et al.
patent: 3665169 (1972-05-01), Henderson et al.
patent: 3684875 (1972-08-01), Smith et al.
patent: 3740536 (1973-06-01), Takahashi et al.
patent: 3770069 (1973-11-01), Loshbough
patent: 3777828 (1973-12-01), Dietmeyer
patent: 3789937 (1974-02-01), Strobel et al.
patent: 3861479 (1975-01-01), Pryor
patent: 3869004 (1975-03-01), Gallo

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