Browse Prior Art Database

Memory Module and Socket with Unique Keying Feature

IP.com Disclosure Number: IPCOM000106478D
Original Publication Date: 1993-Nov-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Davidge, RV: AUTHOR [+2]

Abstract

Disclosed is the use of a keying feature to allow the engagement of SIMM's (Single In-Line Memory Modules) of a first type with corresponding SIMM sockets of a first type, and to allow the engagement of SIMM's of a second type with corresponding SIMM sockets of a second type, while preventing the engagement of SIMM's of the first type with SIMM sockets of the second type, and while preventing the engagement of SIMM's of the second type with SIMM sockets of the first type.

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

Memory Module and Socket with Unique Keying Feature

      Disclosed is the use of a keying feature to allow the
engagement of SIMM's (Single In-Line Memory Modules) of a first type
with corresponding SIMM sockets of a first type, and to allow the
engagement of SIMM's of a second type with corresponding SIMM sockets
of a second type, while preventing the engagement of SIMM's of the
first type with SIMM sockets of the second type, and while preventing
the engagement of SIMM's of the second type with SIMM sockets of the
first type.

      As shown in Fig. 1, a first type of SIMM 2 includes a number of
integrated circuit memory devices 4 mounted on a printed circuit card
6 and electrically connected to a number of conductive pads 8
extending on each side of card 6 along an insertion edge 10.  For
operation within a computing system, SIMM 2 is installed in a first
type of SIMM socket 12, which is typically mounted on a circuit card
or board (not shown) within the system.  Socket 12 includes a trough
portion 13, which presents a slot into which insertion edge 10 is
inserted, so that conductive pads 8 are brought into contact with a
number of contact springs 14, extending along each side of card 6.

      Socket 12 also includes, for holding SIMM 2 in a fully engaged
position, a pair of locking tabs 16, which extend inward from support
structures 17, and a pair of latching tabs 18 mounted on flexible
arms 20.  Card 6 is inserted into trough portion 13 with outer edges
22 extending over locking tabs 16 and latching tabs 18.  When
insertion edge 10 is fully inserted, clearance is achieved between
outer corners 24 of card 6 and locking tabs 16, so the card
installation process is completed by pivoting card 6 downward about
th...