Thin film precision load cell

Details Thin film precision load cell Thin film precision load cell

1990-11-01

1993-06-29

Woodiel, Donald O.

Measuring and testing

Dynamometers

Responsive to force

73862637, 177211, G01L 104

Patent

active

052223981

ABSTRACT:
A load cell having a loading flexure defining mounting slots for receiving the ends of a strain sensing beam. The strain sensing beam is an I-shaped member having a tapered width along its length and bearing pairs of strain gauges on the top and bottom sides. The strain sensing beam is mounted in the slots of the loading flexure with an amalgam. The thermal coefficients of expansion of the strain sensing beam, the strain gauges, and the amalgam are all matched to within a factor of 2 to provide an inherently thermally compensated load cell that is easily manufactured and free from hysteresis.

REFERENCES:
patent: 3179826 (1965-04-01), Trott et al.
patent: 3470400 (1969-09-01), Weisbord
patent: 3611797 (1971-10-01), Pugnaire
patent: 4657097 (1987-04-01), Griffen
patent: 5053195 (1991-10-01), MacKay

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