Stress measuring apparatus

Details Stress measuring apparatus Stress measuring apparatus

1974-10-29

1976-05-18

Gill, James J.

Measuring and testing

Ductility or brittleness

G01B 530

Patent

active

039569268

ABSTRACT:
An apparatus for measuring the stress changes in an underground formation or in concrete or other structures such as bridges, tunnels or the like which includes a sensor unit having a stress or pressure sensitive element exposed to the area under measurement and a hydraulic measurement system actuated by said element so that changes in stress forces or pressure in said area are reflected by changes in the hydraulic measuring system, and a means for converting the changes in said hydraulic system into a visible or recorded indication of said changes to thereby provide a measurement of the stress or pressure changes.

REFERENCES:
patent: 2565847 (1951-08-01), Hilgert
patent: 2927459 (1960-03-01), Farrington
patent: 2957341 (1960-10-01), Menard
patent: 3324727 (1967-06-01), Smith et al.

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