Measuring and testing – Hardness – By penetrator or indentor
Patent
1984-05-10
1985-08-20
Swisher, S. Clement
Measuring and testing
Hardness
By penetrator or indentor
73 83, G01M 342
Patent
active
045356238
ABSTRACT:
The surface hardness of material is tested by the extent of penetration of a tool thereinto by moving the tool onto the surface from a low to a high value of compressive force and then back to the low value by reversible rotative movements with the penetration being determined from the difference between the two rotative movements, in which the movement may be related to incremental rotative steps with the difference in the number of steps determining the extent of penetration and in which the movement may be automatically performed. The improvements comprise differential thread means comprising a rotatable part and means for revolving the rotatable part to effect linear movement of the penetrating end, and flexure means allowing free axial motion but preventing rotation of the rod (21) therebetween.
REFERENCES:
patent: 873248 (1907-12-01), Lagasse et al.
patent: 1770046 (1930-07-01), Shore
patent: 1886851 (1932-11-01), Trecker
patent: 3123997 (1964-03-01), Cosner
patent: 3123998 (1964-03-01), Newman
patent: 3128621 (1964-04-01), Scott
patent: 3352148 (1967-11-01), Shore
patent: 3406566 (1968-10-01), Livingston et al.
patent: 3486373 (1969-12-01), Scott
patent: 3589708 (1971-06-01), Cosner
patent: 3628376 (1971-12-01), Dega et al.
patent: 3728551 (1973-04-01), Culver et al.
patent: 3754436 (1973-08-01), Saxton
patent: 3815125 (1974-06-01), May et al.
patent: 4075478 (1978-02-01), Walker
patent: 4094188 (1978-06-01), Bellouin et al.
patent: 4147052 (1979-03-01), Tsujiuchi et al.
patent: 4175428 (1979-11-01), Eilersen
patent: 4182166 (1980-01-01), Herr
patent: 4193199 (1980-03-01), Whiteley
patent: 4195494 (1980-03-01), Kinney
patent: 4199976 (1980-04-01), Edward
patent: 4222262 (1980-09-01), Batie et al.
patent: 4304123 (1981-12-01), Achinger et al.
patent: 4312220 (1982-01-01), Borgerson et al.
patent: 4312221 (1982-01-01), Edward et al.
patent: 4380926 (1983-04-01), Fritts et al.
Davis IV F. Eugene
Swisher S. Clement
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