Angel,
Thank you for the vertical references. My original concept was to have
something like the Hacksaw suspension. However I was going to use a carbon
fiber material. The carbon fiber stuff didn't have a strong enough spring
constant so I switched to a compression spring. Now I going to an extension
spring. I will be trying an assortment of springs all closely matched to the
requirement, but with different Ks and lengths.
Gary




-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... On
Behalf Of Angel
Sent: Thursday, November 20, 2008 2:15 AM
To: Gary Lindgren
Subject: Re: Vertical Seismometer with Honey Support

Hello Gary,

Take a look at the spring on a Roger Sparks vertical from a while back

It is at the very bottom of the page.

http://mariottim.interfree.it/doc02v_e.htm

it also seem that Roger has a new configuration

http://www.fairpoint.net/~sparksite/CSpring%20Seismometer.html

Regards,

Angel

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