Extensometer for material testing machine

Details Extensometer for material testing machine Extensometer for material testing machine

1987-02-13

1989-04-25

Tokar, Michael J.

Geometrical instruments

Distance measuring

Opposed contacts

G01B 500

Patent

active

048234737

ABSTRACT:
An extensometer for measuring strain in a materials test speciment including a frame, a pair of arms each having one end for contacting a portion of the specimen and a remote end, and a noncontact sensor assembly mounted on the arms to measure change in distance between the contact ends, the arms being pivotally supported between the ends by the frame at the centers of gravity of the arms and attached components of the sensor, to permit the arms to be freely pivotal.

REFERENCES:
patent: 2545482 (1951-03-01), Manjore et al.
patent: 2578066 (1951-12-01), Hyde
patent: 2969597 (1961-01-01), Lroshier
patent: 3729985 (1973-05-01), Sikorra
patent: 3776030 (1973-12-01), Strimel
patent: 3803905 (1974-04-01), Wolf et al.
patent: 4098000 (1978-07-01), Egger
Raske et al., "An Extensometer for Low Cycle Fatigue Tests on Anistropic Materials at Elevated Temperatures", J. Phys. & Sci. Instrum., vol. 12, 1979.

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