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Browse Prior Art Database

Support Assembly for Riser Card and Adapter Cards

IP.com Disclosure Number: IPCOM000114848D
Original Publication Date: 1995-Feb-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 129K

Publishing Venue

IBM

Related People

Barina, RM: AUTHOR [+3]

Abstract

Disclosed is an easily-removed support assembly housing a riser card assembly and corresponding I/O adapter (expansion) cards within a small desktop personal computer. This support assembly includes a sheet metal housing which slides and snaps into place with a single snap. Guides are provided in the mating chassis to facilitate this installation. The servicing and installation of options in the system planar is facilitated by eliminating a need to remove I/O adapter slots separately, since the support assembly is removed with all adapter I/O cards and cables attached.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Support Assembly for Riser Card and Adapter Cards

      Disclosed is an easily-removed support assembly housing a riser
card assembly and corresponding I/O adapter (expansion) cards within
a small desktop personal computer.  This support assembly includes a
sheet metal housing which slides and snaps into place with a single
snap.  Guides are provided in the mating chassis to facilitate this
installation.  The servicing and installation of options in the
system planar is facilitated by eliminating a need to remove I/O
adapter slots separately, since the support assembly is removed with
all adapter I/O cards and cables attached.

      The support assembly provides for the installation of various
sizes of riser cards through the use of multiple threaded support
mounts.  These riser cards can also be of different electrical
interfaces, including the Micro Channel*, Industry Standard
Architecture (ISA), and Personal Computer Interface (PCI).  The first
adapter slot can be shared either between Micro Channel and PCI or
between ISA and PCI.  The support assembly also provides for multiple
external connector interfaces for I/O adapter cards through the use
of a removal rear I/O panel (either ISA or Micro Channel), built-in
card guides for ISA cards, and a pluggable plastic card guide for
Micro Channel Cards.

      Tri-directional stainless steel springs, or other types of
stainless steel springs, are attached every 30mm along the rear edges
of the support assembly, to improve electrical contact between the
support assembly and the mating system chassis, as required to
improve EMC (Electromagnetic Compatibility) characteristics of the
system.  These springs compress and expand to ensure improved
contact.  Multiple plastic decorative panels can be installed in the
rear of the support assembly.

      Fig. 1 is an isometric view of an ISA version of support
assembly 10, as viewed from above, to the front, and to the left,
including the ISA version of the riser bracket 12 with three I/O
adapter cards 14 attached to a riser card 16 mounted to the riser
bracket 12.  Support assembly 10 also includes a snap 18, built-in
card guides 20, EMC springs 22, and an ISA-type rear panel 24.
Structural portions of support assembly 10 are preferably composed of
Galvannealed sheet steel, and the EMC springs 22 are preferably
composed of stainless steel.  This entire assembly slides and snaps
int...