Load cell having thin film strain gauges

Details Load cell having thin film strain gauges Load cell having thin film strain gauges

1981-11-23

1984-02-21

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

73766, 73776, 338 2, G01L 122, G01B 720

Patent

active

044322470

ABSTRACT:
A load cell includes a bridge circuit having first to fourth strain gauge resistors and first and second temperature compensating resistors connected to the respective first and second strain gauge resistors. The first to fourth strain gauge resistors comprise a Nichrome layer formed on an insulating film, the first and second temperature compensating resistors each comprise a two-layered structure of the Nichrome layer and a titanium layer formed thereon, and connecting means for connecting the first to fourth strain gauge resistors and first and second temperature compensating resistors comprise a three-layered structure of the Nichrome layer and titanium layer and also a gold layer formed on the titanium layer.

REFERENCES:
patent: 2662957 (1953-12-01), Eisler
patent: 4188258 (1980-02-01), Mounteer et al.
patent: 4299130 (1981-11-01), Koneval
patent: 4329878 (1982-05-01), Utner et al.
Bethe et al.-"Thin-Film strain-Gauge Transducers", Philips Tech. Rev. 39, No. 3/4, pp. 94-101 (1980).

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