Load cell

Details Load cell Load cell

1981-11-05

1984-06-19

Goldberg, Gerald

Measuring and testing

Dynamometers

Responsive to force

7386265, 73777, G01L 118

Patent

active

044547714

ABSTRACT:
A load cell comprises a semiconductor diaphragm which includes an outer flange portion, a central rigid portion having a smaller thickness than the outer flange portion and a thin resilient portion provided between the outer flange portion and the central rigid portion. At least two piezo-resistors constituting at least part of a bridge circuit are formed in the resilient portion. The load cell further comprises a first glass block secured to the central rigid portion, and a second glass block for securing the outer flange portion. A load is applied to the semiconductor diaphragm through the first glass block, wherein measurement of the applied load is effected by detecting variation in resistance of the resistor bridge circuit.

REFERENCES:
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patent: 3204463 (1965-09-01), Taber
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patent: 3272006 (1966-09-01), Eckard
patent: 3341794 (1967-09-01), Stedman
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patent: 3601209 (1971-08-01), Paelian
patent: 3958456 (1976-05-01), Jacobson
patent: 3985025 (1976-10-01), Ormond
patent: 4080830 (1978-03-01), Eckstein et al.
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patent: 4222277 (1980-09-01), Kurtz et al.
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patent: 4342231 (1982-08-01), Yamamoto et al.
patent: 4364276 (1982-12-01), Shimazoe et al.
"Flat load cells", Strainsert, Brochure #365-2, Aug. 1971.
"Flat load cells", Strainsert, Brochure #365-2MP.

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