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Apparatus for Surface Flatness Measurement

IP.com Disclosure Number: IPCOM000090090D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Docherty, J: AUTHOR

Abstract

This surface flatness measuring apparatus is for positioning a surface of a work piece to be held firmly and precisely in a plane parallel to a reference surface without requiring elaborate adjustments, so that the flatness of the surface can be expeditiously measured with a surface gauge. Three clamping supports 1 are located on a reference flat surface 2 in spaced relationship for holding workpiece 7. Each support 1 has a clamp with a fixed upper jaw 3 which carries a fixed abutment 4 in the undersurface. The three fixed abutments 4 are equidistant from reference surface 2 and hence define a fixed plane parallel to reference surface 2, because three fixed points determine a plane. Moveable lower jaws 5 of the clamps on supports 1 are adjustable by turning handwheels 6.

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Apparatus for Surface Flatness Measurement

This surface flatness measuring apparatus is for positioning a surface of a work piece to be held firmly and precisely in a plane parallel to a reference surface without requiring elaborate adjustments, so that the flatness of the surface can be expeditiously measured with a surface gauge. Three clamping supports 1 are located on a reference flat surface 2 in spaced relationship for holding workpiece 7. Each support 1 has a clamp with a fixed upper jaw 3 which carries a fixed abutment 4 in the undersurface. The three fixed abutments 4 are equidistant from reference surface 2 and hence define a fixed plane parallel to reference surface 2, because three fixed points determine a plane. Moveable lower jaws 5 of the clamps on supports 1 are adjustable by turning handwheels
6. Workpiece 7 is placed in the bight of the clamps so that it rests on jaws 5. The clamps are then tightened by raising jaws 5 by turning wheels 6, until surface 8, the flatness of which is to be determined, is in contiguity with abutments 4. Once surface 8 is contiguous with abutments 4 it lies in the plane parallel to reference surface 2. Surface gauge 9 placed on reference surface 2 is swept over surface 8 to measure its flatness with respect to such reference surface

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