PSN-L Email List Message

Subject: RE: HELICORDER value
From: "Gary Lindgren" gel@.................
Date: Sat, 31 Oct 2009 10:59:26 -0700


Edward,

WinSDR has audible alarms built in the application. Different sounds whether
close by or teleseismic events. You just have to make sure you turn the
speaker down at night unless you want to wake up because of a heavy freight
train going down the track a mile away. Certainly having a paper trace is
impressive, but I would worry about maintaining it up all the time.

Gary

 

From: psn-l-request@.............. [mailto:psn-l-request@............... On
Behalf Of Edward Ianni
Sent: Saturday, October 31, 2009 10:29 AM
To: psn-l@..............
Subject: Re: HELICORDER value

 

This is an interesting point. It would be very nice to be alerted audibly
when an event is actually being received (occurring) in one of our data
logging/analysis programs. I assume it's not that easy to do because of the
varying noise and event levels.   Ed. 


With the drum recorder I am preserving a bit of history and the drum is what
impresses visitors. It is also my warning signal as it sits in our living
room and you can hear the pen skritching on the paper when the quake comes
in. To me, nothing beats the WOW-factor of watching a world-class quake come
in on a drum recorder.

George


At 07:36 AM 10/28/2009, you wrote:



For a lot less trouble why not simply get
A wide screen LED TV and a LAPTOP ?

I bet they may even be less expensive
than those drum recorders ?

Capillary action sounds like the
trees use to pick up water from their roots
???
I think the pumping is really caused by
the outflow (EVAPORATION OR ? MOVING PAPER)
pulling up on the reservoir
as the ink goes to the paper.
The capillary action only keeps
the ink in the tube and little more.

INTERESTING, never thought of this before.


You guys need to study plant roots & Leaves
to understand your own equipment.


----- Original Message ----- From: "Jan Froom" 
To: 
Sent: Tuesday, October 27, 2009 1:52 PM
Subject: Re: TELEDYNE-GEOTECH HELICORDER Ink Pen





You want capillary attraction to pull the ink out of the ink reservoir, so
you have to have the top of the ink in the reservoir below the pen level,
otherwise the ink will siphon causing a very wide inky trace.  
I use a simple plastic one oz bottle which I've placed two brass tubes in
the lid, one going to the bottom of the
bottle and one just though the top for a air vent. The one going to the
bottom of the bottle is then connected to the pen using
neoprene tubing. To get the whole thing going... I put my finger over the
air vent tube, squeeze the bottle until ink comes out
the pen, then remove my finger from the air vent, and release the squeeze on
the bottle.
The pen opening must be _*EXACTLY*_ tangent to the face of the drum... I
installed the pen... and then put a very fine sand
paper on the drum surface and sanded the pen to get that tangent fit.
Getting the pen to pull ink was the hardest part of my installation and
I probably spent more time getting the pen to work... than anything else.
Having George Bush & Steve Hammond available for suggestions and support was
the only way I got mine going.
Another interesting point is the force at which the pen makes contact with
the paper...
our pens have a counter weight on a screw at the back end of the pen which
can be adjusted to adjust the contact force.
Too light and pen will skip on a large rapid swings... too heavy and you've
decreased your sensitivity.
I'm curious as to how many other "drummers" are out there?
Jan in Gilroy
Stephen Hammond wrote:




Hi, the ink will flow if the reservoir fluid level is above the pen. The
trick is to keep it from flowing too much. I used a wire clamp on the tubing
to cut the flow down. Professional models used low pressure pumps and an fin
valve. If I can suggest, search online for "chart pen ink" and you will find
the Recorder Charts Pens Company in Newhall CA. 800-758-0740. While they do
not list your unit they have a large selection of professional pens, ink and
paper. It might be worth a trip to the website or even a call to see what
they can offer in the way of a solution.

Steve

 

*From:* psn-l-request@.............. [ mailto:psn-l-request@..............
 ] *On Behalf Of *James Allen
*Sent:* Saturday, October 24, 2009 9:46 PM
*To:* psn-l@..............
*Subject:* Re: TELEDYNE-GEOTECH HELICORDER

 

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 -----

    *From:* Stephen Hammond < mailto:shammon1@.............
 >

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

    *Sent:* Saturday, October 24, 2009 8:41 PM

    *Subject:* RE: TELEDYNE-GEOTECH HELICORDER

     

    There is a typo. Not needs try needle... Steve

     

    *From:* psn-l-request@..............
    < 
mailto:psn-l-request@..............>
    [ 
mailto:psn-l-request@............... *On Behalf Of *Stephen Hammond
    *Sent:* Saturday, October 24, 2009 8:38 PM
    *To:* psn-l@.............. < mailto:psn-l@..............
 >
    *Subject:* RE: TELEDYNE-GEOTECH HELICORDER

     

    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.

    Regards, Steve Hammond PSN Aptos, CA

     

     

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)



George Bush
Sea Ranch, CA, USA
38.73775N, 123.48882W 

  _____  


No virus found in this incoming message.
Checked by AVG - www.avg.com 
Version: 8.5.423 / Virus Database: 270.14.40/2471 - Release Date: 10/31/09
07:53:00













Edward,

WinSDR has audible alarms built in the application. = Different sounds whether close by or teleseismic events. You just have to make = sure you turn the speaker down at night unless you want to wake up because of a = heavy freight train going down the track a mile away. Certainly having a paper = trace is impressive, but I would worry about maintaining it up all the = time.

Gary

 

From:= psn-l-request@.............. [mailto:psn-l-request@............... On = Behalf Of Edward Ianni
Sent: Saturday, October 31, 2009 10:29 AM
To: psn-l@..............
Subject: Re: HELICORDER value

 

This is an interesting point. It would be very nice to be = alerted audibly when an event is actually being received (occurring) in one of our data logging/analysis programs. I assume it's not that easy to do because of = the varying noise and event levels.   = Ed. 


With the drum recorder I am preserving a bit of history and the drum is = what impresses visitors. It is also my warning signal as it sits in our = living room and you can hear the pen skritching on the paper when the quake comes = in. To me, nothing beats the WOW-factor of watching a world-class quake come in = on a drum recorder.

George


At 07:36 AM 10/28/2009, you wrote:

For a lot less trouble why not simply get
A wide screen LED TV and a LAPTOP ?

I bet they may even be less expensive
than those drum recorders ?

Capillary action sounds like the
trees use to pick up water from their roots
???
I think the pumping is really caused by
the outflow (EVAPORATION OR ? MOVING PAPER)
pulling up on the reservoir
as the ink goes to the paper.
The capillary action only keeps
the ink in the tube and little more.

INTERESTING, never thought of this before.


You guys need to study plant roots & Leaves
to understand your own equipment.


----- Original Message ----- From: "Jan Froom" <JDarwin@.............>
To: <psn-l@..............>
Sent: Tuesday, October 27, 2009 1:52 PM
Subject: Re: TELEDYNE-GEOTECH HELICORDER Ink Pen



You want capillary attraction to pull the ink out = of the ink reservoir, so you have to have the top of the ink in the reservoir below = the pen level, otherwise the ink will siphon causing a very wide inky = trace. 
I use a simple plastic one oz bottle which I've placed two brass tubes = in the lid, one going to the bottom of the
bottle and one just though the top for a air vent. The one going to the = bottom of the bottle is then connected to the pen using
neoprene tubing. To get the whole thing going... I put my finger over = the air vent tube, squeeze the bottle until ink comes out
the pen, then remove my finger from the air vent, and release the = squeeze on the bottle.
The pen opening must be _*EXACTLY*_ tangent to the face of the drum... I installed the pen... and then put a very fine sand
paper on the drum surface and sanded the pen to get that tangent = fit.
Getting the pen to pull ink was the hardest part of my installation = and
I probably spent more time getting the pen to work... than anything = else. Having George Bush & Steve Hammond available for suggestions and = support was the only way I got mine going.
Another interesting point is the force at which the pen makes contact = with the paper...
our pens have a counter weight on a screw at the back end of the pen = which can be adjusted to adjust the contact force.
Too light and pen will skip on a large rapid swings... too heavy and = you've decreased your sensitivity.
I'm curious as to how many other "drummers" are out there?
Jan in Gilroy
Stephen Hammond wrote:


Hi, the ink will flow if the reservoir fluid level is above the pen. The = trick is to keep it from flowing too much. I used a wire clamp on the tubing = to cut the flow down. Professional models used low pressure pumps and an fin = valve. If I can suggest, search online for "chart pen ink" and you will = find the Recorder Charts Pens Company in Newhall CA. 800-758-0740. While they = do not list your unit they have a large selection of professional pens, ink and = paper. It might be worth a trip to the website or even a call to see what they = can offer in the way of a solution.

Steve

 

*From:* psn-l-request@.............. [ = mailto:psn-l-request@..............] *On Behalf Of *James Allen
*Sent:* Saturday, October 24, 2009 9:46 PM
*To:* psn-l@..............
*Subject:* Re: TELEDYNE-GEOTECH HELICORDER

 

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 -----

    *From:* Stephen Hammond < = mailto:shammon1@.............>

    *To:* psn-l@.............. < = mailto:psn-l@..............>

    *Sent:* Saturday, October 24, 2009 8:41 PM

    *Subject:* RE: TELEDYNE-GEOTECH HELICORDER

    

    There is a typo. Not needs try needle... Steve

    

    *From:* psn-l-request@..............
    < mailto:psn-l-request@..............>
    [ mailto:psn-l-request@..............] *On Behalf Of *Stephen = Hammond
    *Sent:* Saturday, October 24, 2009 8:38 PM
    *To:* psn-l@.............. < = mailto:psn-l@..............>
    *Subject:* RE: TELEDYNE-GEOTECH HELICORDER

    

    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.

    Regards, Steve Hammond PSN Aptos, CA

    

    

_______________________________________________________= ___

Public Seismic Network Mailing List (PSN-L)

See http://www.seismicnet.co= m/maillist.html for more information.


George Bush
Sea Ranch, CA, USA
38.73775N, 123.48882W



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.423 / Virus Database: 270.14.40/2471 - Release Date: = 10/31/09 07:53:00


[ Top ] [ Back ] [ Home Page ]