Browse Prior Art Database

Robust Hot Pluggable Electrical Connector Contact

IP.com Disclosure Number: IPCOM000113283D
Original Publication Date: 1994-Aug-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 96K

Publishing Venue

IBM

Related People

Campbell, JS: AUTHOR [+2]

Abstract

This invention relates to the interconnection of circuit boards utilizing field-separable pin/contact-type connectors. Technical advances in computer systems are demanding the ever-increasing need for more I/O connector. Also, due to system requirements to minimize computer system downtime, the ability to "hot" plug connectors is becoming a basic connector requirement.

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This is the abbreviated version, containing approximately 52% of the total text.

Robust Hot Pluggable Electrical Connector Contact

      This invention relates to the interconnection of circuit boards
utilizing field-separable pin/contact-type connectors.  Technical
advances in computer systems are demanding the ever-increasing need
for more I/O connector.  Also, due to system requirements to minimize
computer system downtime, the ability to "hot" plug connectors is
becoming a basic connector requirement.

      In most high I/O connector systems, the connectors have used
pin-in-socket-type contacts.  The pins used are all of the same
length.

      In previous connectors, additional longer pins have been added
to provide pins of 2 or more lengths within the connector; this
provides power and logic sequencing to allow "hot" plugging.  The
extra pin length must be accommodated by the mating contact.  The
longest pins will wipe much longer than the shortest pins; therefore,
the mating contacts must be taller.  This added height of the mating
contact makes these contacts fragile and susceptible to
handling/plugging damage.

      The disclosed invention describes an improved "hot pluggable"
mating contact, which is much more resistant to handling/plugging
damage, is more easily reworked, and offers improved electrical
performance over present "hot plug" contacts.

      The invention can be described, in summary, as an improved "hot
pluggable" connector contact which has unique features that improve
its mechanical strength and electrical performance over previous such
contacts.  A "hot plug" connector contact must be tall to accommodate
all multiple-length mating pins that are required for providing
proper sequencing for "hot" plugging.

      Existing designs of "hot plug" connector contacts are simply
extended height versions of standard contacts.  This can be seen in
the example shown in Fig. 1A and 1B; Fig. 1A shows an example of a
standard contact, and Fig. 1B shows an example of a present "hot
plug" contact that has been made taller by adding extension 3, simply
extending the contact height.

      The disclosed invention is shown in Fig. 2.  This "hot plug"
contact has several unique design features not prese...