Browse Prior Art Database

Diagonal Grille Pattern for Improved Product Fragility

IP.com Disclosure Number: IPCOM000116260D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Ramirez, CN: AUTHOR

Abstract

Disclosed is a grille pattern for use on RISC System/6000* computers and similar electronic assemblies which retains cooling and electromagnetic performance while improving the structural strength of the assembly.

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This is the abbreviated version, containing approximately 100% of the total text.

Diagonal Grille Pattern for Improved Product Fragility

      Disclosed is a grille pattern for use on RISC System/6000*
computers and similar electronic assemblies which retains cooling and
electromagnetic performance while improving the structural strength
of the assembly.

      Computer systems and similar electronics assemblies must be
capable of withstanding shock and vibration due to handling.  As
packaging density has increased, metallic grilles are now required to
supply structural support to internal planars.  Previously,
perforation patterns in these grilles were required to permit
adequate airflow and restrict electromagnetic emissions.  The
standard rectangular grille pattern, however, has poor resistance to
vertical shock loads, since the perforation pattern caused the mesh
sections to be loaded in bending rather than tension and compression.
This invention aligns the grille perforations so as to maximize the
tension/compression loading of the grille material, thus maximizing
the strength and rigidity of the assembly.  The size and shape of the
grille openings are unchanged, so that cooling and electromagnetic
performance is unaffected.  An unperforated border around the grille
is required in order to realize the improvement in strength and
rigidity.
  *  Trademark of IBM Corp.