PSN-L Email List Message
Subject: Re: TELEDYNE-GEOTECH HELICORDER
From: "James Allen" jcallen1@...........
Date: Sat, 24 Oct 2009 20:31:45 -0700
For anyone else facing using ink in an old Teledyne-Geotech Helicorder, =
I was just informed that one might use the very small felt tip ink pens =
used on hygrothermographs. I understand they come in blue or red ink =
color, last a long time and will just slip over the end of the =
helicorder stylus with minor modification.
James Allen
----- Original Message -----=20
From: ChrisAtUpw@..........
To: psn-l@.................
Sent: Saturday, October 24, 2009 6:54 PM
Subject: Re: TELEDYNE-GEOTECH HELICORDER
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,
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.
Regards,
Chris Chapman
For anyone else facing using ink in an old Teledyne-Geotech =
Helicorder, I=20
was just informed that one might use the very small felt tip ink pens =
used on=20
hygrothermographs. I understand they come in blue or red ink =
color, last a=20
long time and will just slip over the end of the helicorder stylus with =
minor=20
modification.
James Allen
----- Original Message -----
Sent: Saturday, October 24, =
2009 6:54=20
PM
Subject: Re: TELEDYNE-GEOTECH=20
HELICORDER
Perhaps Geotech might have such as Al Hrubetz suggests...but =
being as=20
ink stylus writing went out long ago...one may have to resort to =
other=20
(surplus...read: junk or unknown condition substitutes)=20
brands.
Hi James,
It's just an idea, but I can still buy =
ink=20
drawing pens for technical drawing. They have plastic push on ink =
cartridges=20
which can be refilled and the ink is available in 250 ml and 23 ml =
bottles.=20
The ones which I am familiar with are UNO and Rotring. The Rotring =
Isograph=20
nibs are available separately from 0.1 to 1.0 mm.
Note that you can also buy fine stainless =
steel=20
tube in a wide range of sizes. I use fine piano wire for cleaning =
blocked pens=20
with the special cleaning solution. Hot Fairy washing up liquid also =
breaks=20
down the ink quite well.
Note that hot wires are usually spot =
welded on. I=20
would expect the wire to be Nichrome.
Regards,
Chris Chapman
. =
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