Load cell type weight-measuring device

Details Load cell type weight-measuring device Load cell type weight-measuring device

1984-11-05

1986-02-25

Miller, Jr., George H.

Weighing scales

With testing

177164, 177211, 73 1B, 7386267, G01G 1952, G01G 2314, G01G 314, G01L 122

Patent

active

045723095

ABSTRACT:
A load cell type weight-measuring device includes a load cell; a test voltage generator for generating a voltage equal to a rated output voltage of the load cell; a zero-point setting circuit; an amplifying circuit; a switching circuit for selectively coupling the load cell and test voltage generator to the amplifying circuit; and a data processing circuit for generating weight data corresponding to an output signal from the amplifying circuit. The amplifying circuit includes a first amplifier of a gain 1 for amplifying an output voltage from the zero-point setting circuit; first and second resistors; and a second amplifier whose first input terminal is connected to an output terminal of the first amplifier through the first resistor and is connected to its own output terminal through the second resistor and whose second input terminal is connected to the switching circuit.

REFERENCES:
patent: 4061198 (1977-12-01), Caldicott
patent: 4139069 (1979-02-01), Domis et al.
patent: 4294322 (1981-10-01), Nishiyama
patent: 4417631 (1983-11-01), Jonnson

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