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IP.com Disclosure Number: IPCOM000005450D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2001-Oct-10

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Bakulesh Patel


When a twist pin (made by T.R.W. and I.T.T.) and a conventional type eyelet for an interconnect system is used for connecting plug-in modules to P.C. boards, the eyelets make electrically unreliable con'nection when subjected to transverse shock loading on the module. When a plug-in module is sub- jected to transverse loading, permanent deformation in the bulge diameter of the tWiSt pin sometimes OC- curs to an extent that its diameter becomes smaller than the internal diameter of the eyelet. This creates an ideal condition for an electrical intermittance. Due to the nature of the design of the twist pin, the per- manent deformation in the bulge diameter can occur even when the plug.in module is subjected to very low transverse shock levels. Severe damage to the bulge of the twist pin can occur during insertion and removal of the module when the pin is pulled or pushed in a direction other than that normal to the eyelet socket.