Hello Mr. Lindgren;

I'm curious about the hinge assembly,

Have you ever tried using a graphite surface
as your resting surface for the ball bearing ?

Have you ever tried a flexible membrane instead of
a bearing surface where two seperate items
come in contact ?

If you have ever tried these before or do you know of anyone who has ??

Thanks for any input and,  that really looks like a nice setup you have.

" AS Magic-Sighs and Broom-Fondle rise from the sidelines to peek over your shoulders"

Best regards,
geoff

----- Original Message ----- 
From: "Gary Lindgren" 
To: 
Sent: Friday, April 23, 2010 2:31 PM
Subject: Latest Lehman Seismometers


> Hello All,
> 
> I have documented the latest update to my Lehman seismometer(s). See
> http://sites.google.com/site/seismicsensorinfo/lehman-seismometer 
> 
> There are several pictures and also a finite-element analysis of the Chapman
> magnet design.
> 
> Gary
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Gary Lindgren
> 
> 585 Lincoln Ave
> 
> Palo Alto CA 94301
> 
> 
> 
> 650-326-0655
> 
> 
> 
>  www.blue-eagle-technologies.com
> Check out Lastest Seismometer Reading
> 
>  cymonsplace.blogspot.com 
> 
> 
> sites.google.com/site/seismicsensorinfo/Home    Design Details for New
> Vertical Seismometer 
> 
> 
> 
> 
> 
>
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