Browse Prior Art Database

Pad-on-Pad Array Connector Clamping Spring using a Shape Memory Alloy

IP.com Disclosure Number: IPCOM000103984D
Original Publication Date: 1993-Feb-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Rice, JL: AUTHOR [+2]

Abstract

Disclosed is a clamping mechanism which, using springs made from a shape memory alloy, is capable of providing a force to separable pad-on-pad connectors. Shape memory alloys are materials which can be formed into one conformation above some critical temperature, formed to another conformation below that temperature, and then will return to the original high temperature form upon passing through the critical temperature. The disclosed connector clamping mechanism uses bow shaped pieces of shape memory alloy with keyhole shaped cut-outs at the top of the bow, (a) in the figure, held in a metal cage (b), to put a tensile force on through-carrier pins (c), which are mounted to an elastomer-faced backplate (d), thus holding the two carrier segments containing the pad on pad arrays in place.

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Pad-on-Pad Array Connector Clamping Spring using a Shape Memory Alloy

      Disclosed is a clamping mechanism which, using springs made
from a shape memory alloy, is capable of providing a force to
separable pad-on-pad connectors.  Shape memory alloys are materials
which can be formed into one conformation above some critical
temperature, formed to another conformation below that temperature,
and then will return to the original high temperature form upon
passing through the critical temperature.  The disclosed connector
clamping mechanism uses bow shaped pieces of shape memory alloy with
keyhole shaped cut-outs at the top of the bow, (a) in the figure,
held in a metal cage (b), to put a tensile force on through-carrier
pins (c), which are mounted to an elastomer-faced backplate (d), thus
holding the two carrier segments containing the pad on pad arrays in
place.  The elastomer facing on the backplate serves to spread the
force evenly over the connector array.
     The cage could also serve as a heat conductor from a resistance
heater to actuate the springs.  In use, the pins attached to the
back-plate would be put through holes in the carriers.  The cage,
containing the shape memory springs, would then be dropped into place
and slid into position to put the heads of the pins into the keyhole
shaped cut outs at the top of the bow.  Assembly would be done with
the springs in their high temperature shape (e).  The heat source,
either a resistance heater or a ho...