Title: Hardness tester

Abstract: The tester comprises basically a four wheeled carriage, a scale arm containing graduations attached to the carriage in a counterpoised condition about a pivot axis, and a rolling, round fluted cutting tool coupled to the carriage and to the scale arm. The cutting tool, as the carriage is drawn across a test surface, leaves an indented track of the cutting flutes. The width of the track marks is a function of the coating hardness and applied load.

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Inventors: Saunders, Frank L. (Midland, MI, US)

Application Number: 563038
Filing Date: 1975-03-28
Publication_date: 1976-02-10
Assignee: The Dow Chemical Company (Midland, MI)
Primary Class(es): 73/81 73/150R
Other Classes:
US Patent Ref:

2279264	Apr, 1942	Hoffman	73/78.
3389463	Jun, 1968	Gerek et al.	73/150.

Other Refs:
Primary Examiner: Myracle, Jerry W.
Assistant Examiner:
Attorney: Ayers; Earl D.