Steve Hammond
Is there need for a special reservoir to insert the capillary tubing =
into or will the ink start flowing by the action of the pen on the chart =
paper?
Thanks
James Allen
----- Original Message -----=20
From: Stephen Hammond=20
To: psn-l@.................
Sent: Saturday, October 24, 2009 8:41 PM
Subject: RE: TELEDYNE-GEOTECH HELICORDER
There is a typo. Not needs try needle. Steve
=20
From: psn-l-request@.............. =
[mailto:psn-l-request@............... On Behalf Of Stephen Hammond
Sent: Saturday, October 24, 2009 8:38 PM
To: psn-l@..............
Subject: RE: TELEDYNE-GEOTECH HELICORDER
=20
For some time some PSN members were using hypodermic needs to build =
ink pens. You simply grind the point off and have a precession 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's. 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 also using this design.=20
Regards, Steve Hammond PSN Aptos, CA
=20
=20
From: psn-l-request@.............. =
[mailto:psn-l-request@............... On Behalf Of James Allen
Sent: Saturday, October 24, 2009 8:09 PM
To: psn-l@..............
Subject: Re: TELEDYNE-GEOTECH HELICORDER
=20
I think that Chris has a great idea for using ink on a Helicorder. I =
appreciate it and will experiment with this approach.
James Allen
----- Original Message -----=20
From: ChrisAtUpw@..........
To: psn-l@.................
Sent: Saturday, October 24, 2009 6:54 PM
Subject: Re: TELEDYNE-GEOTECH HELICORDER
=20
In a message dated 24/10/2009 22:44:00 GMT Daylight Time, =
paleoartifact@......... writes:
Perhaps Geotech might have such as Al Hrubetz suggests...but being =
as ink stylus writing went out long ago...one may have to resort to =
other (surplus...read: junk or unknown condition substitutes) brands.
Hi James,
=20
It's just an idea, but I can still buy ink drawing pens for =
technical drawing. They have plastic push on ink cartridges which can be =
refilled and the ink is available in 250 ml and 23 ml bottles. The ones =
which I am familiar with are UNO and Rotring. The Rotring Isograph nibs =
are available separately from 0.1 to 1.0 mm.=20
Note that you can also buy fine stainless steel tube in a wide =
range of sizes. I use fine piano wire for cleaning blocked pens with the =
special cleaning solution. Hot Fairy washing up liquid also breaks down =
the ink quite well.
Note that hot wires are usually spot welded on. I would expect =
the wire to be Nichrome.
=20
Regards,
=20
Chris Chapman
. =20
Steve Hammond
Is there need for a special reservoir =
to insert the=20
capillary tubing into or will the ink start flowing by the action of the =
pen on=20
the chart paper?
Thanks
James Allen
----- Original Message -----
From:=20
Stephen=20
Hammond
Sent: Saturday, October 24, =
2009 8:41=20
PM
Subject: RE: TELEDYNE-GEOTECH=20
HELICORDER
There=20
is a typo. Not needs try needle=85 Steve
From: psn-l-request@...............
=20
[mailto:psn-l-request@............... On Behalf Of Stephen=20
Hammond
Sent: Saturday, October 24, 2009 8:38 =
PM
To: psn-l@..............
Subje=
ct:=20
RE: TELEDYNE-GEOTECH HELICORDER
For=20
some time some PSN members were using hypodermic needs to build ink =
pens. You=20
simply grind the point off and have a precession tip that can =
then be=20
connected to the reservoir using a capillary feed tube. We learned the =
process=20
from Howard who used this design back in the first Bay area seismic =
station=20
way before our time in the 40=92s. I ran two drum recorders back =
around 1990 and=20
Jan Froom currently has a display station at Bonfante Gardens in =
Gilroy=20
CA that has a permanent display he put together for them also using =
this=20
design.
Regards,=20
Steve Hammond PSN Aptos, CA
From: =20
psn-l-request@.............. [mailto:psn-l-request@............... =
On=20
Behalf Of James Allen
Sent: Saturday, October 24, 2009 =
8:09=20
PM
To: psn-l@..............
Subject: Re: =
TELEDYNE-GEOTECH=20
HELICORDER
I=20
think that Chris has a great idea for using ink on a =
Helicorder. I=20
appreciate it and will experiment with this=20
approach.
James=20
Allen
-----=20
Original Message -----
From: ChrisAtUpw@.......=20
To: psn-l@..............=20
Sent: =20
Saturday, October 24, 2009 6:54 PM
Subject: =20
Re: TELEDYNE-GEOTECH HELICORDER
In=20
a message dated 24/10/2009 22:44:00 GMT Daylight Time, paleoartifact@.........=20
writes:
Perhaps=20
Geotech might have such as Al Hrubetz suggests...but being as ink =
stylus=20
writing went out long ago...one may have to resort to other=20
(surplus...read: junk or unknown condition substitutes)=20
brands.
Hi=20
James,
It's=20
just an idea, but I can still buy ink drawing pens for technical =
drawing.=20
They have plastic push on ink cartridges which can be refilled and =
the ink=20
is available in 250 ml and 23 ml bottles. The ones which I am =
familiar with=20
are UNO and Rotring. The Rotring Isograph nibs are available =
separately from=20
0.1 to 1.0 mm.
Note=20
that you can also buy fine stainless steel tube in a wide range of =
sizes. I=20
use fine piano wire for cleaning blocked pens with the special =
cleaning=20
solution. Hot Fairy washing up liquid also breaks down the ink quite =
well.
Note=20
that hot wires are usually spot welded on. I would expect the wire =
to be=20
Nichrome.
Regards,
Chris=20
Chapman
.=20
=
=