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# High Force Mechanism for Blind Swapping Computer Components in Tight Spaces

IP.com Disclosure Number: IPCOM000016204D
Original Publication Date: 2002-Aug-21
Included in the Prior Art Database: 2003-Jun-21
Document File: 4 page(s) / 192K

IBM

## Abstract

A mechanism design was necessary to produce adequate force to fully seat the mating connectors of the Federation interposer to planer assembly. To obtain this goal the spacing was very dense and to date the plug forces had doubled from our intial try to over come this impossible task. We need to create a mechanism which provided about 3:1 ratio plug the interposer and still meet the human factors criteria. This had to produce 30lbs of force in a about a 6" tall cassette with 20 mm of connector travel. Federation interposer contact build up:

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High Force Mechanism for Blind Swapping Computer Components in Tight Spaces

A mechanism design was necessary to produce adequate force to fully seat the mating connectors of the Federation interposer to planer assembly. To obtain this goal the spacing was very dense and to date the plug forces had doubled
from our intial try to over come this impossible task.

We need to create a mechanism which provided about 3:1 ratio plug the interposer and still meet the human factors criteria. This had to produce 30lbs of force in a about a 6" tall cassette with 20 mm of connector travel.

Federation interposer contact build up:

- 3 signal blocks (8X10) 40 grams per X 240 = 9600 grams - 30 shields (chevron) 40 grams per X 30 = 1200 grams ______________________________________________________________

Total = 10800 grams

1 ounce = 28.34952 grams 1 pound = 453.59232 grams

10800 / 453.59232 = 23.80992694 (24 lbs.) 24 lbs X 20 % = 4.8 lbs Safety Factor ( 5 lbs.) ______________________________________

Total 29 lbs. IBM Human Factors require no more than 10lbs for normal activation. Ideal would be a 3/1 mechanical advantage however 2.5/1 would be acceptable. Design point 30 lbs.

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