Browse Prior Art Database

Low Cost Blank Bracket for CompactPCI Enclosures

IP.com Disclosure Number: IPCOM000123947D
Original Publication Date: 1999-Aug-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 5 page(s) / 147K

Publishing Venue

IBM

Related People

Bulluck, G: AUTHOR [+2]

Abstract

Numerous companies are using OEM adapter faceplates which fit boxes that meet CompactPCI form factor specifications. Although the common form factor provides many advantages such as adapter interchangeability, the OEM blank brackets that are currently available are expensive when compared to the subject alternative blank brackets. The low cost bracket design also has some functional advantages as well.

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Low Cost Blank Bracket for CompactPCI Enclosures

   Numerous companies are using OEM adapter faceplates
which fit boxes that meet CompactPCI form factor specifications.
Although the common form factor provides many advantages such as
adapter interchangeability, the OEM blank brackets that are currently
available are expensive when compared to the subject alternative
blank brackets.  The low cost bracket design also has some functional
advantages as well.

   Currently, most OEM blank adapter brackets are machined
from an aluminum extrusion, fitted with a formed and plated EMC
spring seal, and fitted with cast attachment screw retainers which
require tightly toleranced mating parts for proper fit and function.
Product costs for boxes that use this hardware are higher as a result
of the expenses related to close tolerances and multiple use of the
brackets.  See Figure 1 for an OEM example blank bracket.

   The subject low cost blank bracket for CompactPCI
enclosures provides equivalent EMC sealing and enhanced fit and
lower cost when compared to the OEM blank brackets.  These
advantages are largely due to the specifics of the blank bracket
design.  Refer to Figures 2, 3 and 4 for more detail.

   The low cost bracket is fabricated from galvanealled sheet
steel using standard blanking and forming operations.  Thumbscrews,
retainers and an overlay are assembled to the blank to produce the
blank bracket assembly.  The thumbscrews are inserted through a hole
in the thin retainers which are held within a hem-folded area of the
bracket.  The folded area helps to retain the thumbscrews and also
creates a 2.5mm thick area whi...