Self-contained stress indicator mechanism

Details Self-contained stress indicator mechanism Self-contained stress indicator mechanism

1975-01-23

1976-05-04

Myracle, Jerry W.

Measuring and testing

Ductility or brittleness

73141A, G01L 500

Patent

active

039540049

ABSTRACT:
A self-contained stress indicator that can be incorporated in a structural element of a consumer product such as a bolt. An enclosed cylinderical hole in the head of the bolt of a predetermined effective end area completely filled with a fluid such as an elastomatic material. A rod with an effective predetermined area extends into the cylinderical hole, responsive to the volumetric change therein, to be actuated through the medium of the fluid in a measurable fixed relation to the stress value of the bolt.

REFERENCES:
patent: 1994388 (1935-03-01), Erichsen
patent: 3410135 (1968-11-01), Reynaud
patent: 3602186 (1971-08-01), Popenoe
patent: 3638479 (1972-02-01), Boutet

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