US 4,285,234 A · Load-measuring devices

Abstract

A load-measuring device, comprising a ring to be interposed between two opposed bodies coaxial with the load axis. Circumferentially-spaced projections separate one axial face of the ring from one of the bodies, and similar but angularly-staggered projections separate the other axial face from the other body, so that when the bodies approach under load the ring is distorted to an undulating shape. The distortion may be measured by a set of strain gauges fixed to the axial faces of the ring, and the output of a second set of gauges fixed to the radial faces of the ring may serve to compensate for distortions of the ring caused by things other than axial thrust, e.g. temperature variation. The projections may be fixed to the ring, or fixed to and located by the ring casing so that they bear against the ring in use.

Claims10

Dependent claims

A load-measuring device comprising a ring-shaped body,

at least three circumferentially-spaced first axial projections presenting sectorially-aligned surfaces operatively mounted so that said surfaces engage a first of the two axial faces of said ring-shaped body;
at least three circumferentially-spaced second axial projections presenting sectorially-aligned surfaces operatively mounted so that said surfaces engage the second and opposite of said axial faces of said ring-shaped body at locations staggered relative to those of said first axial projection;
means to detect the strain imposed upon said ring-shaped body when said ring-shaped body is distorted elastically to sectorially-undulating shape by opposed axial loads applied to said ring-shaped body through said first and second axial projections.

Dependencies are inferred from the claim text.

Load-measuring devices

Life of this patent

Load-measuring devices

Life of this patent

Abstract

Claims10