Test procedure for measuring the geometric features of a test specimen
AssigneeUnited States Golf Association
InventorsJohn Spitzer, Matthew Pringle, James Hubbell
Life of this patent
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Abstract
The test procedure for measuring a geometric feature of a test specimen employs a replicating compound to obtain a casting with a negative image of the geometric feature followed by forming a protective covering over the casting from a replicating compound having a contrasting color. The casting and protective covering unit is cut to obtain a test piece and a flat bed scanner is used to scan the profile of the test piece and obtain an electronic two-dimensional image of the profile for analysis.
Claims9
A test procedure to measure a test specimen comprising the steps of
- applying a first casting compound to a surface of a test specimen;
- maintaining the casting compound on said surface for a time sufficient for the compound to cure into a self-supporting casting having a negative impression of said surface;
- removing the casting from said surface of the test specimen;
- applying a second casting compound of a contrasting color to that of the first casting compound over the negative impression on the casting;
- allowing the second casting compound to cure into a protective covering on the negative impression on the casting while forming a positive impression in the covering as a negative image of the negative impression on the casting;
- cutting the casting and protective layer thereon in a plane corresponding to a surface of interest of said test specimen to obtain a test piece having a profile characterised by showing a casting layer and a covering layer sandwiching the negative impression therebetween;
- and
- measuring the negative impression in the casting to determine the geometric feature of said surface of the test specimen corresponding to said plane of cutting.
A test procedure to measure a test specimen comprising the steps of
- applying a first casting compound tea surface of a test specimen;
- maintaining the casting compound on said surface for a time sufficient for the compound to cure into a self-supporting casting having a negative impression of said surface;
- removing the casting from said surface of the test specimen;
- applying a second casting compound of a contrasting color to that of the first casting compound over the negative impression on the casting;
- allowing the second casting compound to cure into a protective covering on the negative impression on the casting while forming a positive impression in the covering as a negative image of the negative impression on the casting;
- cutting the casting having the protective covering thereon to obtain a test piece;
- scanning said test piece on a flatbed scanner to form an electronic two-dimensional image of the profile of said test piece;
- obtaining a negative image of said electronic image as a replica of the surface of said test specimen corresponding to the location of said test piece in said test specimen;
- and
- measuring said negative image to determine conformance of said replica with a predetermined standard.
Dependencies are inferred from the claim text.