PSN-L Email List Message
Subject: Re: Mystery item and its potential seismometry uses/s?
From: "meredith lamb" paleoartifact@.........
Date: Thu, 25 Oct 2007 16:24:23 -0600
Hi John,
Yes.... you are correct...the rod would twist sideways (rub), rather than
roll
as a crossed rod pivot should.
All is not lost however with the aluminum; it does have another pair of
holes
that can accomodate a rod through it.
Yes....(ha), I also put up yet another photo (bottom of the web page) of a
more
correct crossed rod pivot and denoted my error.
http://home.earthlink.net/~meredithlamb/
Meredith
On 10/25/07, John Lahr wrote:
>
> At 10:52 AM 10/25/2007, you wrote:
> >...I've added another 6th picture and text for a crude "crossed rod"
> >pivot using
> >the same item.
>
> Meredith,
>
> It would be interesting to test this arrangement of rods. I think
> that due to the angles,
> the pivot point will need to rub rather than roll. If that's the
> case there will be much
> greater friction.
>
> John
>
>
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Hi John,
Yes.... you are correct...the rod would twist sideways (rub), rather than roll
as a crossed rod pivot should.
All is not lost however with the aluminum; it does have another pair of holes
that can accomodate a rod through it.
Yes....(ha), I also put up yet another photo (bottom of the web page) of a more
correct crossed rod pivot and denoted my error.
Meredith
On 10/25/07, John Lahr <johnjan@........> wrote:
At 10:52 AM 10/25/2007, you wrote:
>...I've added another 6th picture and text for a crude "crossed rod"
>pivot using
>the same item.
Meredith,
It would be interesting to test this arrangement of rods. I think
that due to the angles,
the pivot point will need to rub rather than roll. If that's the
case there will be much
greater friction.
John
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To leave this list email
PSN-L-REQUEST@.............. with
the body of the message (first line only): unsubscribe
See
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