Browse Prior Art Database

Method of Testing Insulation Displacement Contacts

IP.com Disclosure Number: IPCOM000060083D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Bauman, AH: AUTHOR [+2]

Abstract

A TECHNIQUE IS DESCRIBED WHEREBY INSULATION DISPLACEMENT connector (IDC) contacts, when used in conjunction with stranded wire, are tested in such a way so to detect potentially defective connections.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 97% of the total text.

Page 1 of 1

Method of Testing Insulation Displacement Contacts

A TECHNIQUE IS DESCRIBED WHEREBY INSULATION DISPLACEMENT connector (IDC) contacts, when used in conjunction with stranded wire, are tested in such a way so to detect potentially defective connections.

The use of IDC connections is well known in the electrical connector industry, particularly in telephone circuitry where solid conductor wire is used. However, defects have appeared regularly when attempting to use stranded wire in conjunction with the IDC connectors. Previously accepted testing methods, such as the use of elevated temperature and humidity, while measuring resistance changes between the wire and the connector, have not proved to be satisfactory. This is because the insulation material, such as polyvinyl chloride, used with the wire is known to "outgas" and become hard or brittle so as to prevent the stranded conductor from assuming a shape to relieve the stress that creates a reliable connection. The technique described herein elimantes the need to elevate temperature and humidity, in a chamber. The testing process consists of the use of an infra-red camera, at ambient temperatures, to observe uneven temperature gradients which may appear during the passage of rated current, or higher, through the connector. When a change in temperature is observed, the contact is then examined through the use of an x-ray machine or through matallurgical cross sectioning, so that appropriate changes may be made in t...