Browse Prior Art Database

Make/ Break Connection Scheme for Hot Plugging

IP.com Disclosure Number: IPCOM000121776D
Original Publication Date: 1991-Sep-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Herard, JD: AUTHOR [+2]

Abstract

Disclosed is a method for providing a make/break connection on two- piece connectors which are shielded. The feature can be readily applied to both IBM designed connectors and to off the shelf vendor products with minimal cost and allows maximum design flexibility.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 85% of the total text.

Make/ Break Connection Scheme for Hot Plugging

      Disclosed is a method for providing a make/break
connection on two- piece connectors which are shielded.  The feature
can be readily applied to both IBM designed connectors and to off the
shelf vendor products with minimal cost and allows maximum design
flexibility.

      The invention consists of three main parts:  the primary spring
contact 1, the tab contact 2, and the non-conductive coating 3, as
shown in the figures.

      Normally, the spring 1 would mate with the tab 2 making contact
and wiping for some given length L.  Such a contact has no break
feature.  However, by applying a hard and thin non-conductive coating
to the tab 2, a non-conductive portion x of the total wipe length L
can be formed.  This region x would then "break" contact forming a
make/ break contact tab.

      The length x of the coated region can be controlled along with
its starting distance L' from the point of first contact.  In this
way, the time at which disconnect occurs can be precisely set, as
well as the duration of the disconnect (both would be determined
dependent upon plug or actuation speed).  A reconnect region L" can
be provided, if desired, by stopping the coated region x before the
end of the contact wipe length L.

      To provide this "break" function an insulative coating, such as
epoxy, could be used.  Film coatings, such as epoxy, are very
durable.  The placement of such a coating can be con...