Measuring and testing – Dynamometers – Responsive to force
Patent
1983-06-22
1986-02-25
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to force
7386263, 177210C, G01L 114, G01D 304
Patent
active
045720061
ABSTRACT:
A load measuring transducer comprises a frame structure machined out of a single piece and constituted by an inflexible fixed member and a movable member interconnected by parallel arms and resiliently articulated. The fixed member carries plates of a reference capacitor and one plate of a capacitative transducer, the other plate being carried by the moving member. The fixed and variable capacitors are connected to a ratio measuring circuit whose output signal denotes the applied load independent of environmental conditions. The reference capacitor and capacitative transducer may form portions of a differential capacitor and the electrodes may be planar or cylindrical.
REFERENCES:
patent: 2547780 (1951-04-01), Reynst
patent: 4237989 (1980-12-01), Lewis
patent: 4308929 (1982-01-01), Estavoyer
T. L. Foldvari et al., "Capacitive Transducers", Instruments & Control Systems, vol. 37, pp. 77-85, Nov. 1964.
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