Browse Prior Art Database

Bi-Linear Centering Fixture

IP.com Disclosure Number: IPCOM000060301D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Bouck, JB: AUTHOR [+3]

Abstract

A lever-returning device is used as a centering mechanism for locating various sized multi-chip module (MCM) product heatsinks and acts as a clamp to secure the heatsink for processing. Fig. 1 is a partial drawing of the lever-returning assembly showing the top lever assembly 1 (or parallelogram) in the open position with clamps 2 and an MCM 3 in the center. Fig. 2 shows both the top lever assembly 1 and the bottom lever assembly 4 in the closed position with clamps 2 securing the MCM 3. The top lever assembly 1 and bottom lever assembly 4 are held together by means of top and bottom plates 5 that attach to each other by screws 6. The lever assemblies 1 and 4 are held in operating position by pivoting pins 7, 8, 9 and 10. Spacers (not shown) separate the plates 5 to provide room for lever assemblies 1 and 4.

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Bi-Linear Centering Fixture

A lever-returning device is used as a centering mechanism for locating various sized multi-chip module (MCM) product heatsinks and acts as a clamp to secure the heatsink for processing. Fig. 1 is a partial drawing of the lever-returning assembly showing the top lever assembly 1 (or parallelogram) in the open position with clamps 2 and an MCM 3 in the center. Fig. 2 shows both the top lever assembly 1 and the bottom lever assembly 4 in the closed position with clamps 2 securing the MCM 3. The top lever assembly 1 and bottom lever assembly 4 are held together by means of top and bottom plates 5 that attach to each other by screws 6. The lever assemblies 1 and 4 are held in operating position by pivoting pins 7, 8, 9 and 10. Spacers (not shown) separate the plates 5 to provide room for lever assemblies 1 and 4. An activating pin 11 (Fig. 1) is actuated along a provided slot 12 in direction of arrow A by means of a guide (not shown) that attaches pin 11 to a siderail 13 (lever). When pin 11 is actuated, it carries lever 13 about pivot 7 in a counterclockwise direction forcing links 14 and 15, connected by opposite lever 16, to rotate about a pivot 9 in a counterwise direction. Levers 13, 16 and links 14, 15 are connected by screws 17. When levers 13, 16 are rotated about pivots 7 and 9 the clamps 2 are moved inward toward MCM 3. Clamps 2 are attached to links 14, 15 and secure heatsink 3 when fully extended. Spring 18 is now reduced in ten...