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 
  
To: psn-l@.............. 
  
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
    

To: <psn-l@..............>
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.