Browse Prior Art Database

Wedgelock With Jacking Feature

IP.com Disclosure Number: IPCOM000060926D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 3 page(s) / 79K

Publishing Venue

IBM

Related People

Scott, AW: AUTHOR

Abstract

Low insertion force (LIF) connectors reduce the force required to mate and unmate connectors for high I/O printed wiring board (PWB)/frame assemblies. With increased package densities and the need for higher I/Os, both the difficulty of applying the unmating force and the magnitude of the unmating force increase. The small separation between the PWBs with high package densities makes manual removal unsatisfactory. Manually exerting a pull force exposes the components to damage and is difficult due to the limited area accessible for gripping. Cam levers, attached to the PWB/frame, provide an effective method of applying the unmating force. But cam levers are not attractive when using the wedge to simultaneously clamp two electronic PWB/frames against a cold plate interface.

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Wedgelock With Jacking Feature

Low insertion force (LIF) connectors reduce the force required to mate and unmate connectors for high I/O printed wiring board (PWB)/frame assemblies. With increased package densities and the need for higher I/Os, both the difficulty of applying the unmating force and the magnitude of the unmating force increase. The small separation between the PWBs with high package densities makes manual removal unsatisfactory. Manually exerting a pull force exposes the components to damage and is difficult due to the limited area accessible for gripping. Cam levers, attached to the PWB/frame, provide an effective method of applying the unmating force. But cam levers are not attractive when using the wedge to simultaneously clamp two electronic PWB/frames against a cold plate interface. The clearance that must be provided for access to the wedgelock requires that the levers be on the side of the frame opposite the wedgelock. As a consequence, the number of PWB/frame configurations increases since the position of the cam lever is dependent on the location of the frame relative to the wedgelock. A wedgelock with a jacking feature that allows a higher mating force and assists the release of wedge segments operates in the following manner. A wedge assembly, wedgelock 1, seen in an isometric view in Fig. 1, unmates the PWB connector 2, seen in the side view in Fig. 2B, when the wedgelock 1 is released (clamping force removed). The wedgelock 1 consists of alignment wires 3, threaded shaft 4, clamping block 5, stop nut 6, center wedge segments 14 and end segments 15, washer 16 (Fig. 2B) and jacking member 7. Rotation of the clamping block 5 is prevented by contact of the block 5 with the sidewall 8 (Fig. 2B). Thus, the shaft 4 moves through the block 5 when the shaft 4 is rotated. The stop nut 6 is fixed to the shaft 4; hence, clockwise rotation of the shaft 4 (with right hand thread) moves the stop nut 6 away from the block 5. The wedge assembly 1 is positioned in a siderail slot 10 (Fig. 3) of a horizontal rail 11. The assembly of wedge segments and block 5 are on the side of the rail 11 opposite the jacking member 7 and stop nut 6 (Fig. 1). Counterclockwise rotation of the shaft 4 after placing the wedgelock 1 in the siderail slot 10 moves the stop nut 6 toward the block 5 until jacking member 7 and rail 11 are clamped between the stop nut 6 and block 5. In this condition the wedge segments 14 and 15 are released and the shaft 4 is held rigid in a position perpendicular to the rail 11. A rib 12 (Fig. 2A) of the sidewall 8...