PSN-L Email List Message
Subject: Torsion spring
From: "tchannel" tchannel@..............
Date: Sun, 20 May 2007 09:38:21 -0600
Hi All, First thing, is it just me or is it quiet, "too quiet"? Today =
is the 11th day on my calendar since I recorded an earthquake. My =
average, here, is about 2 per week. I am overdue, so I will be watching =
closely today and tomorrow.
On a different issue: I have been restoring old mantle clock. Recently =
a 400 day Anniversary clock. It uses a "torsion spring".........I know =
very little about clocks, but this is an interesting concept. A long =
thin, flat spring wire, is twisted slightly, and uses little energy. =
The result is a very long running clock train.
Has anyone tried to use this concept for a seismometer? Just thinking, =
the period might be long. On the clock I think the spring rotates about =
once every 4 secs in each direction. Could a long spring, something =
like a band-saw blade, but without teeth, be un wrapped and configured =
to move a horizontal arm, left and right, with a long period of approx. =
20 seconds.
Just wondering if this has been tried.
"Watch your helicorders"
Hi All, First thing, is it just me or =
is it quiet,=20
"too quiet"? Today is the 11th day on my calendar since I recorded =
an=20
earthquake. My average, here, is about 2 per week. I am =
overdue, so=20
I will be watching closely today and tomorrow.
On a different issue: I have been =
restoring=20
old mantle clock. Recently a 400 day Anniversary clock. It =
uses a=20
"torsion spring".........I know very little about clocks, but this is an =
interesting concept. A long thin, flat spring wire, is twisted =
slightly,=20
and uses little energy. The result is a very long running clock=20
train.
Has anyone tried to use this concept =
for a=20
seismometer? Just thinking, the period might be long. =
On the=20
clock I think the spring rotates about once every 4 secs in each=20
direction. Could a long spring, something like a band-saw =
blade, but=20
without teeth, be un wrapped and configured to move a horizontal =
arm, left=20
and right, with a long period of approx. 20 seconds.
Just wondering if this has been =
tried.
"Watch your helicorders"
Ted
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