Hardness testing apparatus

Details Hardness testing apparatus Hardness testing apparatus

1975-12-12

1977-05-10

Gill, James J.

Measuring and testing

Hardness

G01N 308, G01N 340

Patent

active

040220567

ABSTRACT:
Hardness testing apparatus is provided having a pair of anvil elements adapted to receive and hold a test object which may then be subjected to increasing pressures by application of an increasing force to one of the anvil elements while holding the other anvil in a fixed position. The increasing force is applied through a pivotally mounted element, one end of which operatively engages the anvil and which is provided with a weight which is movable toward its other end. Drive means for moving the weight along the pivotally mounted element are provided as well as means for stopping such movement and indicating the applied force when the test object fractures. Means are also provided for reversing the direction of motion of the weight at the time of fracture of the test object and to return the weight to a position where it is in equilibrium with the anvil.

REFERENCES:
patent: 534994 (1895-03-01), Buzby
patent: 2228902 (1941-01-01), Allen
patent: 2703492 (1955-03-01), Brissette et al.
patent: 2975630 (1961-03-01), Michel

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