Hi,

I have a pdf of that 
patent  http://bnordgren.org/seismo/us003685011.pdf  which is quite 
detailed, so long as you don't mind reading the "patentese" text.

Brett


At 01:05 PM 10/24/2009 -0600, you wrote:
>Hi all,
>
>The E-Bay # is 180423674973 however it was sold.  The pictures are still 
>there for viewing, if one
>goes down the page thereon.
>
>However, the patent number is known, which gives
>insight into the mechanical design for such a small instrument; to derive 
>such a long ~ 5 second period,
>in case anybody is interested.  The patent number is 3,685,011 and it can 
>readily be seen on the Google
>Patents search program.



Watch our wiggles
http://bnordgren.org/seismo/gif_images.htm

or watch some very very good wiggles
http://aslwww.cr.usgs.gov/Seismic_Data/telemetry_data/ANMO_24hr.html


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