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Four-Point Equalizing Centering Clamp

IP.com Disclosure Number: IPCOM000061000D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 3 page(s) / 59K

Publishing Venue

IBM

Related People

Vrooman, RW: AUTHOR

Abstract

Disclosed is a clamp assembly tool for accurately centering a rectangular object (in the plane of the rectangle) so that the geometrical center of the object is aligned with a reference center of the tool and the edges of the object are parallel with the orthogonal reference axes of the tool. The figure shows the tool assembly. The base assembly has a flat section (not shown) on which there is a cylindrical section 1. Section 1 contains a cavity 2 and within it is a cylindrical pedestal 3 which is the platform on which the object to be aligned is placed. In addition, section 1 has four channels 4 cut into it which are centered on the orthogonal reference axes of the tool.

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Four-Point Equalizing Centering Clamp

Disclosed is a clamp assembly tool for accurately centering a rectangular object (in the plane of the rectangle) so that the geometrical center of the object is aligned with a reference center of the tool and the edges of the object are parallel with the orthogonal reference axes of the tool. The figure shows the tool assembly. The base assembly has a flat section (not shown) on which there is a cylindrical section 1. Section 1 contains a cavity 2 and within it is a cylindrical pedestal 3 which is the platform on which the object to be aligned is placed. In addition, section 1 has four channels 4 cut into it which are centered on the orthogonal reference axes of the tool. Each of the channels 4 acts as a guide for an interposer 5 which, by means of spring 6 in a suitable cavity, tends to be pushed outwards away from the center of the tool. (Only one of the four springs and cavities is shown in the figure.) Mounted on each of the interposers 5 is a replaceable jaw 20. By interchanging jaws, different size objects can be accommodated. Surrounding cylindrical section 1 are two cam rings whose inner radii match the outer radius of section 1 with appropriate clearances for sliding fits. Upper cam ring 8 has been partially sectioned to show a portion of lower cam ring 7. Two camming surfaces 9, machined on the inner radius of lower cam ring 7, engage the two interposers parallel to the X-axis of the tool. Similarly, upper cam ring 8 has two camming surfaces 10 which engage the two interposers parallel to the Y-axis of the tool. A peg 11 on a cam ring working in conjunction with tension spring 13 and peg 12 mounted on the base assembly tends to pull a cam ring in a clockwise direction with respect to the base. There are two such peg and spring assemblies, although only one is shown. Handles 14 and 15 permit manual movement of the cam rings 7 and 8. Pin 18 mounted in lower cam ring 7 projects downward into slot 19 in the base assembly to limit ring 7 rotation to about 20 degrees. A cover 16, which has been sectioned in the figure to expose other parts, is f...