Browse Prior Art Database

Total EMI Enclosure

IP.com Disclosure Number: IPCOM000107453D
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 1 page(s) / 56K

Publishing Venue

IBM

Related People

Parks, HM: AUTHOR

Abstract

This disclosure offers a unique method of providing total EMI containment within the machine chassis and does not rely on any considerations by the outer cover. This is a departure from the usual outside cover protection from electromagnetic radiation or emissions. This type of enclosure meets the requirements of Class B FCC specifications while allowing for easy access to upgrade or service the unit.

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Total EMI Enclosure

      This disclosure offers a unique method of providing total EMI
containment within the machine chassis and does not rely on any
considerations by the outer cover.  This is a departure from the
usual outside cover protection from electromagnetic radiation or
emissions.  This type of enclosure meets the requirements of Class B
FCC specifications while allowing for easy access to upgrade or
service the unit.

      Referring to Fig. 1, the machine chassis (1) is an aluminum
stamping which mounts all the components of the desk top computer.
The chassis cover (3) completes the enclosure with a series of
interlocking tabs around the perimeter (2) (4).  The offset tabs of
the chassis and chassis cover allow installation/removal to be
accomplished by one-half inch sliding action instead of the entire
length.  The finger pull recesses (5) are provided for the removal of
the chassis cover.

      Fig. 2 shows the chassis portion of the interlocking tab (6)
with the spring contact (7) which ensures conductive connection
between the two elements.  The "softness" of the spring contact also
permits the sliding action required for installation and removal.
EMI positive contact points are maintained regardless of repetitive
install/remove cycles, tolerances of parts and rigors of shipping.

      Disclosed anonymously.