Browse Prior Art Database

Radio Frequency Interference Seal

IP.com Disclosure Number: IPCOM000102103D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Coles, RJ: AUTHOR [+3]

Abstract

Disclosed is a radio frequency interference (RFI) shield which completes the Faraday cage RFI protection required at the front of a drawer-mounted electronic assembly-unit. The shield is attached to a mounting plate by means of which the unit is mounted in a steel drawer chassis. The shield comprises a front piece in the form of a grill which acts as a protective screen but also allows the passage of cooling air. Formed integrally along each edge of the front piece are resilient 'fingers' which engage with the chassis when the device is inserted.

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Radio Frequency Interference Seal

       Disclosed is a radio frequency interference (RFI) shield
which completes the Faraday cage RFI protection required at the front
of a drawer-mounted electronic assembly-unit.  The shield is attached
to a mounting plate by means of which the unit is mounted in a steel
drawer chassis.  The shield comprises a front piece in the form of a
grill which acts as a protective screen but also allows the passage
of cooling air.  Formed integrally along each edge of the front piece
are resilient 'fingers' which engage with the chassis when the device
is inserted.

      The figure illustrates a single electronic assembly unit 2,
with mounting hardware comprising an RFI shield 5 (IBM PN44F5302) and
a mounting plate 1.  The device has a 5 1/4" form factor with
standard fixings, to which plate 1 is fixed.  The mounting plate 1 is
designed to carry the unit 2 and run in rails 3 in a four-unit
drawer.  It also has a frame shaped front section 4 which carries the
RFI shield 5. Both the front section 4 and the RFI shield 5 have
openings 6 and 6A for cooling air.  Openings 6 in item 5 are sized to
retain RFI shielding qualities.

      The rails 3 are mounted in a plated steel enclosure 7 which is
designed to have four cells.  Each cell 8 has a set of rails 3 which
guide the unit into place.  The open end of each cell is closed by
the RFI shield 5. Shield 5 is made from metallic spring material
having resilient "fingers" 10 on its ed...