Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1976-03-17
1977-04-12
Swisher, S. Clement
Measuring and testing
With fluid pressure
Dimension, shape, or size
G01B 1316, G01B 1319
Patent
active
040167470
ABSTRACT:
A technique for simultaneously measuring the concentricity of axially spaced cross-sectional locations of a nominally cylindrical test surface is described. A measuring cylinder is pneumatically supported coaxial with the mean axis of the test surface. A plurality of pairs of distance sensors are supported at axially spaced portions of the cylinder. Upon a rotation of the pneumatically supported reference cylinder about its axis, the successive distance readings of the sensors of each pair as such sensors come into registration with a given point on the periphery of the test surface is measured, and each such pair is then radially displaced as a unit by an amount equal to one half the difference between the distances detected by the successive sensors in the pair during the rotation. A subsequent rotation of the supported measuring cylinder about its axis causes the distance readings of the radially displaced sensors to accurately indicate the deviation from concentricity of the associated cross-section location of the test surface.
REFERENCES:
patent: 2392016 (1946-01-01), Wattebot
patent: 2726539 (1955-12-01), Aller
Swisher S. Clement
VMEI "Lenin" - NIS
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