Boots – shoes – and leggings
Patent
1985-07-12
1987-09-22
Gruber, Felix D.
Boots, shoes, and leggings
33504, 356376, 358107, 364560, G06F 1546, G06F 1570, G01B 2130
Patent
active
046959823
ABSTRACT:
A method and apparatus for characterizing a central circular aperture of a workpiece, for example a flexible information storage disk. The apparatus utilizes a noncontact sensor system having a rotary stage upon which the workpiece is placed. A reference edge extending approximately to the axis of rotation of the stage serves as a reference point from which a laser beam measures a plurality of radial distances extending from the reference edge to a plurality of points about the disk's central aperture. A computer utilizes these distances along with a known deviation of the reference edge from the center of rotation of the stage to construct a shape comprising a plurality of inscribed triangles. The center of the shape is found by mathematically determining its center of gravity. The center of gravity is then used to locate a reference coordinate system and precise reference circles are drawn around the center of gravity. The size and shape of the disk central aperture is then plotted based on the deviation of the aforementioned shape from the reference circles.
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Gruber Felix D.
Monteith Dennis P.
Verbatim Corporation
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