PSN-L Email List Message

Subject: TELEDYNE-GEOTECH HELICORDER
From: "James Allen" jcallen1@...........
Date: Sat, 24 Oct 2009 12:56:46 -0700


Does anyone have or know of a place where I can obtain a replacement ink =
dispensing writing stylus for a Teledyne-Geotech Helicorder?
Thanks
James Allen
  ----- Original Message -----=20
  From: meredith lamb=20
  To: psn-l@.................
  Sent: Saturday, October 24, 2009 12:05 PM
  Subject: Re: instrument design


  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.  Go to the Google search engine, clich the =
"other" link and go down to the=20
  Patents search program and enter in the patent number.  One can fully =
review the text and drawings and
  download such with no fuss.  My initial "impression" is that it is =
kind of a "mix" of the old Wechert (with the springs much lower), and =
even possibly "somewhat" like a gravitational pendulum of more recent =
design....if,
  the mass pendulum can be raised or lowered on the boom.  Its a very =
interesting design which ~ might
  even be useful for a unidirectional sensor application; i.e., N-S =
and/or E-W, all in one instrument...but I
  suppose that possiblity might be taking it too far for whatever =
various reason/s.=20

  Take care, Meredith Lamb

  On Sat, Oct 24, 2009 at 12:32 PM, tchannel  =
wrote:

    I do not see this on ebay, could you send me the item #?

    tchannel@............

    Thanks, Ted


    ----- Original Message ----- From: "Robert McClure" =
=20

    To: 

    Sent: Saturday, October 24, 2009 11:26 AM
    Subject: Re: instrument design=20




       It looks like an inverted pendulum to me, with a spring hinge at =
the bottom.

      On 10/24/09, meredith lamb  wrote:

        Hi James,

        Thanks very much for the E-Bay note on the seismometer!  The =
pictures were ~
        vague, but I think I see the flat metal strip on top.  =
Interesting hanging
        mass approach.  I am "speculating" that it has a photo sensor
        on the bottom for rough centering purposes?  The seller may send =
a PDF
        file on such which might
        also give more overall insight.

        Makes me wonder whether a round piano wire that replaces the =
flat metal
        strip would work out?

        Meredith

        On Fri, Oct 23, 2009 at 8:14 PM, James Allen =
 wrote:


           To Meredith and all, there is a Kinemetrics SH1 currently =
listed on Ebay
          with the case removed so that you can see the mechanism.
          Jim Allen







      __________________________________________________________

      Public Seismic Network Mailing List (PSN-L)

      To leave this list email PSN-L-REQUEST@.............. with
      the body of the message (first line only): unsubscribe
      See http://www.seismicnet.com/maillist.html for more information.=20


    __________________________________________________________

    Public Seismic Network Mailing List (PSN-L)

    To leave this list email PSN-L-REQUEST@.............. with the body =
of the message (first line only): unsubscribe
    See http://www.seismicnet.com/maillist.html for more information.









Does anyone have or know of a place = where I can=20 obtain a replacement ink dispensing writing stylus for a = Teledyne-Geotech=20 Helicorder?
Thanks
James Allen
----- Original Message -----
From:=20 meredith lamb
Sent: Saturday, October 24, = 2009 12:05=20 PM
Subject: Re: instrument = design

Hi all,
 
The E-Bay # is 180423674973 however it was sold.  The = pictures are=20 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=20 such a long ~ 5 second period,
in case anybody is interested.  The patent number is = 3,685,011 and=20 it can readily be seen on the Google
Patents search program.  Go to the Google search engine, = clich the=20 "other" link and go down to the 
Patents search program and enter in the patent number.  = One can=20 fully review the text and drawings and
download such with no fuss.  My initial "impression" is = that it=20 is kind of a "mix" of the old Wechert (with the springs much lower), = and even=20 possibly "somewhat" like a gravitational pendulum of more recent=20 design....if,
the mass pendulum can be raised or lowered on the boom.  Its = a very=20 interesting design which ~ might
even be useful for a unidirectional sensor application; i.e.,=20 N-S and/or E-W, all in one instrument...but I
suppose that possiblity might be taking it too far for whatever = various=20 reason/s. 
 
Take care, Meredith Lamb
 
On Sat, Oct 24, 2009 at 12:32 PM, tchannel = <tchannel@............> wrote:
I do not see this on ebay, could you send me the = item=20 #?

tchannel@............

Thanks, = Ted


-----=20 Original Message ----- From: "Robert McClure" <bobmcclure90@.........>=20 Sent: = Saturday, October=20 24, 2009 11:26 AM
Subject: Re: instrument design=20



 It looks like an inverted pendulum to me, = with a=20 spring hinge at the bottom.

On 10/24/09, meredith lamb = <paleoartifact@.........> wrote:
Hi James,

Thanks very much for the = E-Bay note=20 on the seismometer!  The pictures were ~
vague, but I = think I=20 see the flat metal strip on top.  Interesting = hanging
mass=20 approach.  I am "speculating" that it has a photo = sensor
on the=20 bottom for rough centering purposes?  The seller may send a = PDF
file on such which might
also give more overall=20 insight.

Makes me wonder whether a round piano wire that = replaces=20 the flat metal
strip would work = out?

Meredith

On Fri,=20 Oct 23, 2009 at 8:14 PM, James Allen <jcallen1@...........> wrote:

 To Meredith and all, there is a = Kinemetrics=20 SH1 currently listed on Ebay
with the case removed so that = you can=20 see the mechanism.
Jim=20 = Allen





__________________= ________________________________________

Public=20 Seismic Network Mailing List (PSN-L)

To leave this list = email PSN-L-REQUEST@.............. with
the body = of the=20 message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for = more=20 information.=20 =

____________________________________________________= ______

Public=20 Seismic Network Mailing List (PSN-L)

To leave this list email = PSN-L-REQUEST@.............. with the body of = the message=20 (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more = = information.


[ Top ] [ Back ] [ Home Page ]