Measuring and testing – Volumetric content measuring
Patent
1978-02-21
1979-08-28
Ruehl, Charles A.
Measuring and testing
Volumetric content measuring
G01L 100
Patent
active
041656369
ABSTRACT:
A method and means for determining the amount of compressional load in an assembly of clamped elements by measuring the friction between adjacent elements in the assembly. A rotatable element is positioned between two non-rotatable elements within the assembly and the torque necessary to rotate the rotatable element is measured. By measuring or calculating the torque necessary to rotate the rotatable element with a known compressional load, the relationship between torque and compressional load can be established whereby comparison of a measured torque with the established relationship permits conversion of any measured torque to compressional load in applications where element surface coefficients of friction do not change appreciably.
REFERENCES:
patent: 2887876 (1959-05-01), Frankel et al.
patent: 2888825 (1959-06-01), Krafft
patent: 3535911 (1970-10-01), Armstrong et al.
patent: 3791210 (1974-02-01), Taylor
patent: 3882719 (1975-05-01), Fletcher et al.
L. C. Towle--"Shear-Strength & Friction Measurement on Thin Layers Under High Pressure,"--Journal of Applied Physics--vol. 42, No. 6, May 1971, pp. 2368-2376.
Hinderstein Philip M.
Odetics, Inc.
Ruehl Charles A.
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