PSN-L Email List Message
Subject: Re: Digest from 10/24/2007 00:00:50
From: Randall Peters PETERS_RD@..........
Date: Thu, 25 Oct 2007 08:59:01 -0400
It's a neat piece , Meredith; however, I see a serious problem with bearing friction when it comes to use in
a seismometer. Rolling friction is really complex, as evidenced by the paper I wrote at
http://arxiv.org/abs/physics/0506143
My expectation is that you will find challenges due to `stiction' since the decay of your system (independent
of damping that you supply to the instrument by design) is more in the category of Coulomb friction than
forms that result in exponential decay. As is well known for Coulomb friction, the static coefficient is greater than the kinetic coefficient. Consequently, you would probably need to provide some way to dither your instrument to have much in the way of sensitivity.
Randall Peters
psn-l-digest-request@.............. wrote:
> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------.
> | Message 1 |
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> Subject: Re: Mystery item and its potential seismometry uses/s?
> From: "Jerry Payton"
> Date: Wed, 24 Oct 2007 10:56:15 -0500
>
> This is a multi-part message in MIME format.
>
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>
> OK, Meredith. I give up and curiosity has got this cat. It reminds me of
> an oar-lock, but what was you idea? I've seen no replies to your question
> and there seems to be a lull right now in EQ's. Let's stir up some
> discussion!
> Regards,
> Jerry Payton
>
> ----- Original Message -----
> From: meredith lamb
> To: psn-l@..............
> Sent: Tuesday, October 09, 2007 8:28 PM
> Subject: Mystery item and its potential seismometry uses/s?
>
> Hi all,
>
> I think it might be fun for those of you who are amateur or real
> "engineers";
> to come up with their own thoughts and use/s for a couple pictures of a item
> at:
>
> http://home.earthlink.net/~meredithlamb/
>
> I have my own (surprising) and varied uses in mind; what's yours?
>
> Meredith Lamb
>
> ------=_NextPart_000_0055_01C8162C.7F61FF40
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>
>
>
> charset=3Dwindows-1252">
>
>
>
>
> OK, Meredith. I give up and curiosity has got this =
> cat. =20
> It reminds me of an oar-lock, but what was you idea? I've seen no =
> replies=20
> to your question and there seems to be a lull right now in EQ's. =
> Let's=20
> stir up some discussion!
> Regards,
> Jerry Payton
>
> ----- Original Message -----=20
>
From: title=3Dpaleoartifact@......... =
> href=3D"mailto:paleoartifact@.........">meredith=20
> lamb
>
>
Sent: Tuesday, October 09, 2007 8:28 PM
>
Subject: Mystery item and its potential seismometry=20
> uses/s?
> Hi all,
>
> I think it might be fun for those of you who are amateur or real=20
> "engineers";
> to come up with their own thoughts and use/s for a couple pictures =
> of a=20
> item at:
>
> href=3D"http://home.earthlink.net/~meredithlamb/">http://home.earthlink.n=
> et/~meredithlamb/
>
> I have my own (surprising) and varied uses in mind; what's =
> yours?
>
> Meredith Lamb
>
>
>
> ------=_NextPart_000_0055_01C8162C.7F61FF40--
>
> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------.
> | Message 2 |
> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------'
> Subject: Re: Mystery item and its potential seismometry uses/s?
> From:
> Date: Wed, 24 Oct 2007 11:11:04 -0600
>
> This is a multi-part message in MIME format.
>
> ------=_NextPart_000_000C_01C8162E.914B0A60
> Content-Type: text/plain;
> charset="Windows-1252"
> Content-Transfer-Encoding: quoted-printable
>
> Jerry, You've got that right................This is my slowest month =
> for a year, day after day very uninteresting screens. Maybe tomorrow?
> Since I have no earthquakes to discuss...........Could this device be a =
> support for a large dia. pipe?
>
> As a part of a Seismic device, here is my suggestion:
> Get a large piece of white butcher paper 48" x 48" Draw a center point =
> on the piece of paper, using a black #2 pencil, connecting two opposite =
> diagonal corners.
> Carefully position one corner of the paper facing true north and the =
> opposite corner south.
> Place this device in the center of the paper and align it's support =
> shaft along the N/S axis.
> Trace the profile of the entire device on to the paper using the black =
> #2 pencil.
>
> Wait for a large earthquake, >7 M, closer than 100 miles.
> After the large event, retrace the new position of the device's profile, =
> using a red #2 Pencil.
> Comparing the original position profile with the new position profile, =
> one may be able to plot the general direction of the epicenter, and =
> estimate the magnitude. Unless it move greater than 24" from center.
> Thanks,=20
> Ted
>
> ----- Original Message -----=20
> From: Jerry Payton=20
> To: psn-l@.................
> Sent: Wednesday, October 24, 2007 9:56 AM
> Subject: Re: Mystery item and its potential seismometry uses/s?
>
> OK, Meredith. I give up and curiosity has got this cat. It reminds =
> me of an oar-lock, but what was you idea? I've seen no replies to your =
> question and there seems to be a lull right now in EQ's. Let's stir up =
> some discussion!
> Regards,
> Jerry Payton
>
> ----- Original Message -----=20
> From: meredith lamb=20
> To: psn-l@.................
> Sent: Tuesday, October 09, 2007 8:28 PM
> Subject: Mystery item and its potential seismometry uses/s?
>
> Hi all,
>
> I think it might be fun for those of you who are amateur or real =
> "engineers";=20
> to come up with their own thoughts and use/s for a couple pictures of =
> a item at:
>
> http://home.earthlink.net/~meredithlamb/
>
> I have my own (surprising) and varied uses in mind; what's yours?
>
> Meredith Lamb
>
> ------=_NextPart_000_000C_01C8162E.914B0A60
> Content-Type: text/html;
> charset="Windows-1252"
> Content-Transfer-Encoding: quoted-printable
>
>
>
> charset=3Dwindows-1252">
>
>
>
>
> Jerry, You've got that=20
> right................This is my slowest month for a year, day after day =
> very=20
> uninteresting screens. Maybe tomorrow?
> Since I have no earthquakes to=20
> discuss...........Could this device be a support for a large dia.=20
> pipe?
>
> As a part of a Seismic device, here is =
> my=20
> suggestion:
> Get a large piece of white butcher =
> paper 48" x 48"=20
> Draw a center point on the piece of paper, using a black #2 pencil, =
> connecting=20
> two opposite diagonal corners.
> Carefully position one corner of the =
> paper facing=20
> true north and the opposite corner south.
> Place this device in the center of the =
> paper and=20
> align it's support shaft along the N/S axis.
> Trace the profile of the entire device =
> on to the=20
> paper using the black #2 pencil.
>
> Wait for a large earthquake, >7 M, =
> closer than=20
> 100 miles.
> After the large event, retrace the new =
> position of=20
> the device's profile, using a red #2 Pencil.
> Comparing the original =
> position profile with=20
> the new position profile, one may be able to plot the general =
> direction of=20
> the epicenter, and estimate the magnitude. Unless it move greater =
> than 24"=20
> from center.
> Thanks,
> Ted
>
>
> ----- Original Message -----
> style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
> BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
> style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
> black">From:=20
> Jerry =
> Payton=20
>
>
> Sent: Wednesday, October 24, =
> 2007 9:56=20
> AM
> Subject: Re: Mystery item and =
> its=20
> potential seismometry uses/s?
>
> OK, Meredith. I give up and curiosity has got this=20
> cat. It reminds me of an oar-lock, but what was you idea? =
> I've=20
> seen no replies to your question and there seems to be a lull right =
> now in=20
> EQ's. Let's stir up some discussion!
> Regards,
> Jerry Payton
>
> ----- Original Message -----=20
>
From: title=3Dpaleoartifact@......... =
> href=3D"mailto:paleoartifact@.........">meredith=20
> lamb
>
>
Sent: Tuesday, October 09, 2007 8:28 PM
>
Subject: Mystery item and its potential seismometry=20
> uses/s?
> Hi all,
>
> I think it might be fun for those of you who are amateur or real=20
> "engineers";
> to come up with their own thoughts and use/s for a couple =
> pictures of a=20
> item at:
>
> =
> href=3D"http://home.earthlink.net/~meredithlamb/">http://home.earthlink.n=
> et/~meredithlamb/
>
> I have my own (surprising) and varied uses in mind; what's =
> yours?
>
> Meredith Lamb
>
>
>
> ------=_NextPart_000_000C_01C8162E.914B0A60--
>
> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------.
> | Message 3 |
> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------'
> Subject: Re: Mystery item and its potential seismometry uses/s?
> From: "meredith lamb"
> Date: Wed, 24 Oct 2007 20:09:43 -0600
>
> ------=_Part_9710_24185849.1193278183386
> Content-Type: text/plain; charset=ISO-8859-1
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>
> Hi Jerry and all,
>
> I put up some text and 3 more pictures of a rather unusual pendulum
> (horizontal
> sensing), on the web, and some very brief text relating to its other
> vertical sensing
> use/s. The pendulum is essentially a hanging mass or "S-G" type. The
> aluminum
> looks to be quite useful for a variety of seismometer setups....without...as
> much
> material being used. Fun stuff! See:
>
> http://home.earthlink.net/~meredithlamb/
>
> Take care, Meredith Lamb
>
> On 10/24/07, Jerry Payton wrote:
> >
> > *OK, Meredith. I give up and curiosity has got this cat. It reminds me
> > of an oar-lock, but what was you idea? I've seen no replies to your
> > question and there seems to be a lull right now in EQ's. Let's stir up some
> > discussion!*
> > *Regards,*
> > *Jerry Payton*
> > **
> >
>
> ------=_Part_9710_24185849.1193278183386
> Content-Type: text/html; charset=ISO-8859-1
> Content-Transfer-Encoding: 7bit
> Content-Disposition: inline
>
> Hi Jerry and all,
>
> I put up some text and 3 more pictures of a rather unusual pendulum (horizontal
> sensing), on the web, and some very brief text relating to its other vertical sensing
> use/s. The pendulum is essentially a hanging mass or "S-G" type. The aluminum
> looks to be quite useful for a variety of seismometer setups....without...as much
> material being used. Fun stuff! See:
>
>
>
> Take care, Meredith Lamb
> On 10/24/07, Jerry Payton <gpayton880@.......> wrote:
>
>
>
OK, Meredith. I give up and curiosity has got this cat. It reminds me of an oar-lock, but what was you idea? I've seen no replies to your question and there seems to be a lull right now in EQ's. Let's stir up some discussion!
>
>
Regards,
>
Jerry Payton
>
>
> ------=_Part_9710_24185849.1193278183386--
>
> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------.
> | Message 4 |
> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------'
> Subject: RE: Mystery item and its potential seismometry uses/s?
> From: "Steve Hammond"
> Date: Wed, 24 Oct 2007 23:24:27 -0700
>
> This is a multi-part message in MIME format.
>
> ------=_NextPart_000_0001_01C81695.060A0FC0
> Content-Type: text/plain;
> charset="us-ascii"
> Content-Transfer-Encoding: quoted-printable
>
> Hi, The design suggests to me that it may have been connected to a round
> object such as a sailboat's mast. I once read about a counter balance =
> device
> that reduced the port/starboard sway when a boat is at anchor buy using =
> a
> counterbalance pendulum to create an apposing force that reduces the =
> wave
> energy. The rollers in the top photo suggest to me that they would allow =
> the
> base object to be hoisted to the upper portion of a mast increasing the
> effect of the pendulum. Here is a link to some patents that describe =
> this
> idea. www.freepatentsonline.com/CCL-114-122.html=20
> =20
> My guess, Steve Hammond
>
> -----Original Message-----
> From: psn-l-request@.............. [mailto:psn-l-request@............... =
> On
> Behalf Of meredith lamb
> Sent: Wednesday, October 24, 2007 7:10 PM
> To: psn-l@..............
> Subject: Re: Mystery item and its potential seismometry uses/s?
>
> Hi Jerry and all,
> =20
> I put up some text and 3 more pictures of a rather unusual pendulum
> (horizontal
> sensing), on the web, and some very brief text relating to its other
> vertical sensing
> use/s. The pendulum is essentially a hanging mass or "S-G" type. The
> aluminum
> looks to be quite useful for a variety of seismometer =
> setups....without...as
> much
> material being used. Fun stuff! See:
> =20
> http://home.earthlink.net/~meredithlamb/
> =20
> Take care, Meredith Lamb
>
> =20
> On 10/24/07, Jerry Payton wrote:=20
>
> OK, Meredith. I give up and curiosity has got this cat. It reminds me =
> of
> an oar-lock, but what was you idea? I've seen no replies to your =
> question
> and there seems to be a lull right now in EQ's. Let's stir up some
> discussion!=20
> Regards,
> Jerry Payton
>
> =20
>
> ------=_NextPart_000_0001_01C81695.060A0FC0
> Content-Type: text/html;
> charset="us-ascii"
> Content-Transfer-Encoding: quoted-printable
>
>
>
> charset=3Dus-ascii">
> Message
>
>
>
> size=3D2>Hi,=20
> The design suggests to me that it may have been connected to a =
> round object=20
> such as a sailboat's mast. I once read about a counter balance device =
> that=20
> reduced the port/starboard sway when a boat is at anchor buy using a=20
> counterbalance pendulum to create an apposing force that reduces the =
> wave=20
> energy. The rollers in the top photo suggest to me that they would allow =
> the=20
> base object to be hoisted to the upper portion of a mast =
> increasing=20
> the effect of the pendulum. Here is a link to some =
> patents that=20
> describe this idea. href=3D"http://www.freepatentsonline.com/CCL-114-122.html">www.freepatent=
> sonline.com/CCL-114-122.html=20
>
> size=3D2> class=3Da>
>
> size=3D2> My guess, Steve Hammond
>
>
>
> Hi Jerry and all,
>
> I put up some text and 3 more pictures of a rather unusual =
> pendulum=20
> (horizontal
> sensing), on the web, and some very brief text relating to =
> its other=20
> vertical sensing
> use/s. The pendulum is essentially a hanging mass or "S-G"=20
> type. The aluminum
> looks to be quite useful for a variety of seismometer=20
> setups....without...as much
> material being used. Fun stuff! See:
>
> =
> href=3D"http://home.earthlink.net/~meredithlamb/">http://home.earthlink.n=
> et/~meredithlamb/
>
> Take care, Meredith Lamb
> On 10/24/07, class=3Dgmail_sendername>Jerry=20
> Payton < href=3D"mailto:gpayton880@.......">gpayton880@.......>=20
> wrote:=20
>
style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: =
> #ccc 1px solid">
>
>
OK, Meredith. I give up and curiosity has got =
> this=20
> cat. It reminds me of an oar-lock, but what was you =
> idea? I've=20
> seen no replies to your question and there seems to be a lull right =
> now in=20
> EQ's. Let's stir up some discussion!
>
Regards,
>
Jerry Payton
> =
>
QUOTE>
>
> ------=_NextPart_000_0001_01C81695.060A0FC0--
>
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