Load measuring devices

Details Load measuring devices Load measuring devices

1987-03-26

1988-09-13

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

338 5, G07L 122

Patent

active

047700491

ABSTRACT:
A ring-shaped device for interposing between two bodies, to measure the force tending to urge them together or pull them apart in a direction coaxial with the ring. Both axial ends of the ring are robust and resist distortion, but between its ends the ring is of convoluted section so that when the ring shortens or lengthens axially under the applied load, hoop stresses are set up in the convoluted part. These stresses are detected by strain gauges located at intervals around the circumference of that part of the ring. The ring may be contained within a protective cylindrical casing, so designed as not to prevent the full magnitude of the applied load being communicated to the ring inside. To improve linearity of the correlation between the applied load and the response of the strain gauges, a stiffening ring may be attached coaxially to the ring; this sleeve may have robust axial ends, and a thinner cylindrical center part registering with the convoluted part of the ring.

REFERENCES:
patent: Re31698 (1984-10-01), Sansome et al.
patent: 2493029 (1950-01-01), Ramberg
patent: 3036283 (1962-05-01), Singdale et al.
patent: 3088083 (1963-04-01), Ward
patent: 3199057 (1965-08-01), Gindes et al.
patent: 3535923 (1965-10-01), Martorana et al.
patent: 4398429 (1983-08-01), Cook et al.

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