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US 4,364,182 AGranted
Latin square three dimensional gage master
AssigneeThe United States of America as represented by the United States Department of Energy
InventorLynn L. Jones
Life of this patent
Estimating the term…
Abstract
A gage master for coordinate measuring machines has an nxn array of objects distributed in the Z coordinate utilizing the concept of a Latin square experimental design. Using analysis of variance techniques, the invention may be used to identify sources of error in machine geometry and quantify machine accuracy.
Claims8
A gage master for coordinate measuring machines comprising:
- a. n.sup.2 substantially identical object means for defining a point in space, where n is an integer .gtoreq.3;
- b. mounting means for rigidly fastening each object means relative to the other object means to define n.sup.2 points in space, the points being located relative to the coordinate X.sub.0, Y.sub.0, Z.sub.0 at coordinates X.sub.iA, Y.sub.jB, Z.sub.kC where A=unit of distance in the X direction, B=unit of distance in the Y direction, C=unit of distance in the Z direction, i=(0, 1, 2, . . . , n-1), j=(0, 1, 2, . . . , n-1), and for each column X.sub.iA and each row Y.sub.jB, k equals each number of the set (0, 1, 2, . . . , n-1), forming an n.times.n Latin square.
Dependencies are inferred from the claim text.