Browse Prior Art Database

Temperature Safety Latch

IP.com Disclosure Number: IPCOM000012015D
Publication Date: 2003-Apr-02
Document File: 2 page(s) / 94K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that uses a latch to prevent a module from exiting the cage or rails when it is too hot to handle. Benefits include preventing a module from being handled when it is hot.

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Temperature Safety Latch

Disclosed is a method that uses a latch to prevent a module from exiting the cage or rails when it is too hot to handle. Benefits include preventing a module from being handled when it is hot.

Background

Currently, “hot” (i.e. under power) pluggable modules can be inserted and removed during operation. These pluggable modules have a regular latch that allows it to be inserted and removed.

The FDA requires that no metal part that can be touched be over 75 C.  An inserted module under operation normally complies with this requirement. However, the module part inside of the box, which is responsible for the cooling, can exceed 75C and can cause bodily harm if it is removed and touched. Today’s modules have no mechanism to prevent them from being removed if they are too hot.

General Description

The disclosed method describes two mechanisms to prevent a module from being extracted when it is too hot:

 

  • Mechanism 1. A bimetal strip spot-welded on one side to the cage. The bimetal strip bends down as the temperature increases (see Figure 1). The metal strip can be set or bent to block the module from exiting the cage at a preset temperature. The metal strip also can override the existing de-latching mechanism. (A similar mechanism is used in a baking oven when the self-cleaning was on; the door can not be opened until it is safe to open the door.)
    The processes also can be reversed, where the bimetal is attached to the module and hooks onto the cage, pr...