PSN-L Email List Message
Subject: Re: instrument design
From: Brett Nordgren brett3nt@.............
Date: Sat, 24 Oct 2009 15:20:10 -0400
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.
At 01:05 PM 10/24/2009 -0600, you wrote:
>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
or watch some very very good wiggles
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