Extensometer

Details Extensometer Extensometer

1979-12-27

1981-10-13

Little, Willis

Geometrical instruments

Area integrators

Electrical

33148D, 33149J, 33DIG13, 33143L, 128774, 128782, 73767, G01B 716

Patent

active

042940150

ABSTRACT:
An extensometer for detecting traumatized ligaments where the elongation of the ligament is either abnormally large or abnormally small compared to the elongation measured on a healthy ligament for an angle of flexion of the knee. The extensometer includes at least one flexible member having a strain gauge secured thereto to measure deflexion of the flexible member from its normal configuration. The flexible member has a free end and is secured at its opposed end to a support base. A clamping member is provided to retain the free end of the flexible member on a ligament while maintaining the support base substantially stationary with respect to the ligament whereby elongation of the ligament is detected by the deformation of the flexible member from its initial configuration.

REFERENCES:
patent: 2543429 (1951-02-01), Wood
patent: 2666262 (1954-01-01), Ruge
patent: 2744181 (1956-05-01), Rea
patent: 2917920 (1959-12-01), Robinette, Jr. et al.
patent: 4141345 (1979-02-01), Allen et al.

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