Electronic weight measuring device

Details Electronic weight measuring device Electronic weight measuring device

1980-05-09

1981-10-13

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

177210FP, 177211, 177DIG3, G01G 314

Patent

active

042943221

ABSTRACT:
An electronic weight measuring device includes a load cell producing an output voltage varying from -V.sub.X to 0 volts according to the weight of load, a bias circuit producing a variable bias voltage V.sub.X, voltage generator receiving the output voltages from the load cell and bias circuit and producing an output voltage varying within a range from -1/2 V.sub.X to +1/2 V.sub.X, and an analog-digital converter for converting the output voltage from the voltage generator. The electronic weight measuring device further includes a zero point setting circuit coupled to the load cell and bias circuit and applying an output voltage varying with the output voltage from the bias circuit to the load cell, so that the no-load output voltage of the load cell is kept at substantially 0 volts.

REFERENCES:
patent: 4081801 (1978-03-01), Thomas et al.
patent: 4158396 (1979-06-01), Suzuki et al.
patent: 4238784 (1980-12-01), Keen et al.

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