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Versatile Logic Cage for Accepting And Positively Retaining A Multitude Of Logic Cards

IP.com Disclosure Number: IPCOM000100157D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 6 page(s) / 197K

Publishing Venue

IBM

Related People

Ashton, GL: AUTHOR [+6]

Abstract

The following describes a design for an electronic logic cage to accept a multiplicity of covered logic cards along with options available in its construction.

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

Versatile Logic Cage for Accepting And Positively Retaining A Multitude Of Logic Cards

       The following describes a design for an electronic logic
cage to accept a multiplicity of covered logic cards along with
options available in its construction.

      Referring to Fig. 1, a logic cage is constructed of top and
bottom guide rails 1 and 2 which are permanently fastened to side
plates 3 and 4 using any applicable welding technique.

      The top and bottom guide rails 1 and 2 are of a sheet metal
construction which accurately control the cage width. The side plates
3 and 4 are also formed out of sheet metal and are designed such that
they accurately space apart the aforementioned top and bottom guide
rails when fastened together.

      Features designed into the guide rails 1 and 2 can best be seen
when referencing Fig. 2 (lower guide rail).  Guide slots 5 serve to
locate covered logic cards 6 (refer back to Fig. 1).  The
relationship of one guide slot to its adjacent slot is programmed
such that any slot-to-slot configuration is possible.  Rotating the
guide rail along its long axis permits it to be used as the top guide
rail.  The guide rails can have two or three channel sections for
strength considerations.  The overall size and the number of cards to
mount will dictate the number of channels required.  The front and
back channel sections 7, as shown in Fig. 2, can be used for board
mounting and insert/extract latching surfaces for card insertion and
removal.  Openings 8 are provided adjacent to the guide sections to
permit forced or convective air to circulate through the cage,
thereby cooling the inserted logic cards.

      Unique features designed into the side plates 3 and 4 can best
be seen when referring to Fig. 3.  The side plate is designed such
that it is directly interchangeable left to right.  By rotating the
side plate about axis A-A allows the plate to be used for the other
side of the cage.  Rotating the same side plate 180 degrees about
axis B-B permits use of a different size cage both in height and
depth.  These side plates are comprised of any number of slots 9 to
accept tabs from the guide rails as a fastening technique.  The
combination of four sets of slots when used in conjunction with the
guide rails permits use of four different logic cages.

      The side plate has two right angle flanges 10 and 11 directed
in opposite planes in order to mount the cage to a rack-type
configuration.  These parts can also be rotated to and fastened to
accept an additional card size.  This rotation changes the height and
the depth of the eventual cage assembly yet still permits mounting to
a rack in a like manner.

      The third...