James,
Try Geotech Instruments in Dallas, phone  214-221-0000.
 Al
 
 
In a message dated 10/24/2009 2:57:11 P.M. Central Daylight Time,  
jcallen1@........... writes:

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 ----- 
From:  _meredith lamb_ (mailto:paleoartifact@..........  
To: _psn-l@............... (mailto: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 
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. 
 
Take care, Meredith Lamb
 
On Sat, Oct 24, 2009 at 12:32 PM, tchannel <_tchannel@............. 
(mailto:tchannel@............. > wrote:

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

_tchannel@............. (mailto:tchannel@............. 

Thanks,  Ted


----- Original Message ----- From: "Robert McClure" 
<_bobmcclure90@.......... (mailto:bobmcclure90@.......... >  

To: <_psn-l@............... (mailto:psn-l@............... >

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





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

On 10/24/09, meredith lamb <_paleoartifact@.......... 
(mailto:paleoartifact@.......... > 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 <_jcallen1@............ 
(mailto:jcallen1@............ > 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







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__________________________________________________________

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To leave this list email _PSN-L-REQUEST@............... 
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James,
Try Geotech Instruments in Dallas, phone=20
214-221-0000.
 Al
 

In a message dated 10/24/2009 2:57:11 P.M. Central Daylight Time,=20
jcallen1@........... writes:

  
Does anyone have or know of a place whe=
re I can=20
  obtain a replacement ink dispensing writing stylus for a Teledyne-Geotec=
h=20
  Helicorder?
  
Thanks
  
James Allen
  
    
----- Original Message ----- 
    =
From:=20
    meredith lamb 
    
To: psn-l@.............. 
    
Sent: Saturday, October 24, 200=
9 12:05=20
    PM
    
Subject: Re: instrument design<=
/DIV>
    


    
Hi all,
    
 
    
The E-Bay # is 180423674973 however it was sold.  The pictur=
es 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=20
    derive such a long ~ 5 second period,
    
in case anybody is interested.  The patent number is 3,685,0=
11 and=20
    it can readily be seen on the Google
    
Patents search program.  Go to the Google search engine, cli=
ch the=20
    "other" link and go down to the 
    
Patents search program and enter in the patent number. =
 One=20
    can fully review the text and drawings and
    
download such with no fuss.  My initial "impression" is=
 that=20
    it is kind of a "mix" of the old Wechert (with the springs much lower)=
, and=20
    even 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=20
    very 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,=20
      Ted


----- Original Message ----- From: "Robert McClure"=
 <bobmcclure90@.........>=20
      

To: <psn-l@..............>
Sent: Saturday=
,=20
      October 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-Ba=
y note=20
          on the seismometer!  The pictures were ~
vague, but I th=
ink I=20
          see the flat metal strip on top.  Interesting hanging
ma=
ss=20
          approach.  I am "speculating" that it has a photo sensoron=20
          the bottom for rough centering purposes?  The seller may se=
nd a=20
          PDF
file on such which might
also give more overall=20
          insight.

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

Meredith

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


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





_________=
_________________________________________________

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

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

_______________________________________________=
___________

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

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