Calibration-test member for a coordinate-measuring instrument
First Claim
1. A test standard for coordinate-measuring instruments and machine tools, comprising a flat plate which is constructed symmetrically on opposite sides of a central plane of symmetry at the mid-thickness of said plate, a plurality of balls fixedly mounted to said plate with all ball centers in said plane of symmetry, said balls being mounted with such clearance with respect to said plate as to provide ball-contacting measurement-probe access from each side of the said plane of symmetry.
1 Assignment
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Accused Products
Abstract
A calibration-test member in the form of a ball plate fixedly mounts a plurality of precision balls arrayed in spaced relation in a single plane. The ball plate is of symmetrical construction with respect to this plane, the balls being so mounted within one or more cutouts of the plate or on the edge of the plate, with ball centers in the plane of symmetry of the plate, that contacting of the balls is possible from both sides.
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Citations
7 Claims
- 1. A test standard for coordinate-measuring instruments and machine tools, comprising a flat plate which is constructed symmetrically on opposite sides of a central plane of symmetry at the mid-thickness of said plate, a plurality of balls fixedly mounted to said plate with all ball centers in said plane of symmetry, said balls being mounted with such clearance with respect to said plate as to provide ball-contacting measurement-probe access from each side of the said plane of symmetry.
Specification