Thanks Chris, Steve, Al, and Meredith for all your help.  I secured some =
very thin capillary tubing and a hypo. needle.  Will test approach and =
then try to cobble together attaching it to the existing stylus on the =
helicorder.  Will let the list know results.  It really is great knowing =
one is not alone on this quest.
James Allen
Cerritos, Ca.
  ----- Original Message -----=20
  From: ChrisAtUpw@..........
  To: psn-l@.................
  Sent: Sunday, October 25, 2009 8:40 AM
  Subject: Re: Hypodermic Tubing


  In a message dated 25/10/2009, jcallen1@........... writes:
    For some time some PSN members were using hypodermic needles to =
build ink pens. You simply grind the point off and have a precesion tip =
that  can then be connected to the reservoir using a capillary feed =
tube. We learned the process from Howard who used this design back in =
the first Bay area seismic station way before our time in the =
40=E2=80=99s. I ran two drum recorders back around 1990 and Jan Froom =
currently has a display station at Bonfante Gardens  in Gilroy CA that =
has a permanent display he put together for them Regards, Steve Hammond =
PSN Aptos, CA

  Hi James,
     =20
      If you want to get ready supplies of fine SS hypodermic tubing see =
www.smallparts.com They have a very wide range. You can vary the flow =
rate by inserting a variable length of wire through the ink reservoir =
and into the capillary tube. It would probably be easier to get fine =
Nichrome wire than stainless steel.=20
      Alternatively, some companies used to make pens with a coarse tube =
to the reservoir and a fine 'nib' tube pushed into in the other end. =
There are only a limited range of hypodermic needles produced and some =
suppliers refuse to supply non medics, or only sell in boxed quantities.

      Regards,

=EF=BB=BF






Thanks Chris, Steve, Al, and Meredith for all your help.  I =
secured=20
some very thin capillary tubing and a hypo. needle.  Will test =
approach and=20
then try to cobble together attaching it to the existing stylus on the=20
helicorder.  Will let the list know results.  It really is =
great=20
knowing one is not alone on this quest.
James Allen
Cerritos, Ca.

  
----- Original Message ----- 
  From:=20
  ChrisAtUpw@....... 
  
To: psn-l@.............. 
  
Sent: Sunday, October 25, 2009 =
8:40=20
  AM
  
Subject: Re: Hypodermic =
Tubing
  


  

  
In a message dated 25/10/2009, jcallen1@........... =
writes:
  
    
For=20
    some time some PSN members were using hypodermic needles to build =
ink pens.=20
    You simply grind the point off and have a precesion tip that =
 can then=20
    be connected to the reservoir using a capillary feed tube. We =
learned the=20
    process from Howard who used this design back in the first Bay area =
seismic=20
    station way before our time in the 40=E2=80=99s. I ran two drum =
recorders back=20
    around 1990 and Jan Froom currently has a display station at =
Bonfante=20
    Gardens  in Gilroy CA that has a permanent display he put =
together for=20
    them Regards,=20
    Steve Hammond PSN Aptos, =
CA
  

  
Hi James,
  
    
  
    If you want to get ready supplies of fine =
SS=20
  hypodermic tubing see www.smallparts.com They have a =
very wide=20
  range. You can vary the flow rate by inserting a variable length of =
wire=20
  through the ink reservoir and into the capillary tube. It would =
probably be=20
  easier to get fine Nichrome wire than stainless steel. 
  
    Alternatively, some companies used to =
make pens=20
  with a coarse tube to the reservoir and a fine 'nib' tube pushed into =
in the=20
  other end. There are only a limited range of hypodermic needles =
produced and=20
  some suppliers refuse to supply non medics, or only sell in boxed=20
  quantities.
  
 
  
    Regards,
  
 
  
    Chris=20
Chapman