Measuring and testing – Hardness
Patent
1986-11-04
1988-12-20
Noland, Thomas P.
Measuring and testing
Hardness
73 7, 73150R, 301649, G01N 346
Patent
active
047918071
ABSTRACT:
A novel apparatus for determining the relative hardness and abrasion resistance of industrial film coatings and linings is disclosed. In its preferred form, the apparatus comprises a rigid handle incorporating a pre-set angle between its flat lower surface and a flexible spring blade attached at one end to the handle, and a scoring stylus attached at the other end of the spring blade. By placing the bottom of the handle on the surface of the film coating or lining whose relative hardness and abrasion resistance is to be determined, the spring blade is caused to deflect and thereby exert a constant and predetermined force through the scoring stylus onto the film coating or lining. By drawing or pulling the handle across the surface of the film coating or lining while maintaining the lower surface of the handle in complete contact with the film coating or lining, the scoring stylus creates a scratch on the surface of the film coating or lining. Depending upon the cross-sectional configuration of the scoring stylus used, the depth of the scratch created by the scoring stylus can be directly measured, or can be indirectly measured by measuring the width of the scratch and geometrically relating the depth to the measured width. Having determined the depth of the scratch created by the scoring stylus on the surface of the film coating or lining, a quantitative determination of the relative hardness and abrasion resistance of the film coating or lining is obtained.
REFERENCES:
patent: 2130269 (1938-09-01), Dietert
patent: 2436435 (1948-02-01), Kent
patent: 2801540 (1957-08-01), Rondeau
patent: 3069892 (1962-12-01), Gjertsen
patent: 3289458 (1966-12-01), Deichert et al.
patent: 3785198 (1974-01-01), Heetman
"Modern Scratch Hardness Methods"; Instruments, vol. 10, pp. 286-288; Nov. 1937; S. R. Williams.
Bramson Robert S.
Noland Thomas P.
LandOfFree
Apparatus for determining the relative hardness and abrasion res does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for determining the relative hardness and abrasion res, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for determining the relative hardness and abrasion res will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1903588