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Design for the enclosure for a "Hot" add or replace Computer Memory Cartridge

IP.com Disclosure Number: IPCOM000028721D
Original Publication Date: 2004-May-27
Included in the Prior Art Database: 2004-May-27
Document File: 5 page(s) / 280K

Publishing Venue

IBM

Abstract

Disclosed is a design for a Memory Cartridge designed to allow Addition or removal of memory whilst the system is still powered up

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Design for the enclosure for a "Hot" add or replace Computer Memory Cartridge

    Design for the enclosure for a "Hot" add or replace Computer Memory Cartridge Disclosed is a design for a Memory Cartridge designed to allow Addition or removal of memory whilst the system is still powered up On computer systems where it is possible to "hot" add or remove memory and "mirror" groups of memory it is important to make sure that the memory being removed or the slot to which memory is being added is powered down in the correct manner. To do this it is necessary to have a mechanical interlock between the switch that powers up or down the memory and the method of removing that memory.

    In this implementation the memory is contained within a Cartridge that is extracted from the rear of a computer system. The cartridge is driven in or out of the slot using a handle with a cam latch that engages on a pin or pins in the chassis. The handle has a knob on it that engages a pawl into the cartridge that both locks the handle and operates a micro switch to power up the Memory.

    Fig 1. shows how an array of Memory Cartridges can be mounted into a chassis and connected to a Midplane.

Fig 2. Shows the cartridge by itself and its major constituent parts.

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    Fig 3. Here the Handle of the cartridge is pulled up into the open position as if the cartridge were about added to the system. A "racetrack" shaped Cam/pawl is attached to the rear of the knob. The knob is oriented horizontally so that when the handle is shut the cam/pawl would pass through an opening in the front of the cartridge.

    Fig 4....