Browse Prior Art Database

Making Wiring Changes

IP.com Disclosure Number: IPCOM000095600D
Original Publication Date: 1964-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Tepper, HF: AUTHOR

Abstract

This is for making wiring changes to multilayer printed circuit boards which use plated through holes for interconnecting pinned modules. Insulated pins from circuit modules have connections to internal circuit configurations of the boards, but such connections are readily severed to open selected unwanted electrical connections.

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Making Wiring Changes

This is for making wiring changes to multilayer printed circuit boards which use plated through holes for interconnecting pinned modules. Insulated pins from circuit modules have connections to internal circuit configurations of the boards, but such connections are readily severed to open selected unwanted electrical connections.

Central conductive pin 1 is surrounded by insulation sleeve 2 having connective strip 3 between two conductive rings 4 and 5 on it. Inner ring 4 electrically connects to pin 1. Outer ring 5 connects to printed circuit configuration 6 including plating 7 of the plated through hole. The pin is connected to the underside of a circuit module, not shown.

The conductive path from circuit boards 8 to pin 1 is easily broken by severing or removing strip 3. Thus, a wiring change is accomplished by breaking the thin strip 3 to electrically isolate pin 1 which can then have a change wire added to it.

One arrangement comprises a ceramic insulating washer 2 with a fired-on conductive pattern of 3, 4 and 5. After solder dipping the top end of washer 2, it can be inserted through the plated through hole. The solder is then reflowed into contact with pin 1 inside ring 4 and against the printed circuit configuration at the bottom of ring 5.

Another arrangement requires making the rings 4 and 5 and strips 3, 4 and 5 as a thin metallic clip which is clipped onto the end of insulator sleeve 2. Such a clip can be stamped and formed, or...