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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Brian,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Yes we use a leftover
from the same thickness with a <st1:metricconverter ProductID="4 mm" w:st="on">4
mm</st1:metricconverter> hole drilled from the side.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I am experienced with
dome windows. I support them on a flat Alu plate . the lower temperature (80
deg. C. ) makes it easier.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Somone else experienced with
supporting flat windows?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Emile<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>Van:</span></font></b><font
size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;font-family:Tahoma'>
Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b><span
style='font-weight:bold'>Namens </span></b>Brian Cox via Personal_Su</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>bmersibles<br>
<b><span style='font-weight:bold'>Verzonden:</span></b> dinsdag 24 november
2015 1:08<br>
<b><span style='font-weight:bold'>Aan:</span></b> Personal Submersibles General
Discussion<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> Re: [PSUBS-MAILIST]
annealing windows</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi Emile,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
Do you guys use a block of acrylic to simulate the inside temperature of the
other windows that are being annealed?<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Also, how do you place your disks in the oven?
horizontal or vertical? <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Brian<br>
<br>
--- personal_submersibles@psubs.org wrote:<br>
<br>
From: <st1:PersonName ProductID="Emile van Essen" w:st="on">Emile van Essen</st1:PersonName>
via Personal_Submersibles <personal_submersibles@psubs.org><br>
To: "'Personal Submersibles General Discussion'"
<personal_submersibles@psubs.org><br>
Subject: Re: [PSUBS-MAILIST] annealing windows<br>
Date: Mon, 23 Nov 2015 18:52:29 +0100<o:p></o:p></span></font></p>
</div>
<div>
<p><font size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'>Te centre of the acrylic will reach the same temp
as the air. </span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span></font></p>
</div>
<p><font size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'>Buto it will take some 2 hours for <st1:metricconverter
ProductID="40 mm" w:st="on">40 mm</st1:metricconverter> plate!</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'>Regards, Emile</span></font><span lang=EN-GB> </span><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p><b><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
font-weight:bold'>Van:</span></font></b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'> Personal_Submersibles
[mailto:personal_submersibles-bounces@psubs.org] <b><span style='font-weight:
bold'>Namens </span></b>Sean T. Stevenson via Personal_Submersibles<br>
<b><span style='font-weight:bold'>Verzonden:</span></b> zondag 22 november 2015
17:23<br>
<b><span style='font-weight:bold'>Aan:</span></b> Personal Submersibles General
Discussion<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> Re: [PSUBS-MAILIST]
annealing windows</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Brian, just wanted to make sure that the thermocouple in the acrylic
sample is only for monitoring the heat soak, and is not the one you are using
to control the oven temperature? Obviously, the centre of the acrylic is going
to be cooler than the oven air.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>What is the arrangement of heating elements? Are there fans to
circulate the air in the oven to homogenize it? If so, you might look at
diffusing that airflow. You only need enough to prevent temperature gradients
in the oven. You might have a hot spot across from a fan?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Sean<o:p></o:p></span></font></p>
</div>
<p style='margin-bottom:12.0pt'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>On
November 21, 2015 9:27:47 PM MST, Brian Cox via Personal_Submersibles
<personal_submersibles@psubs.org> wrote: <o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Alec,
yes, correct, the window with the hole for the probe is just to monitor the
temp. I wonder if any of those psubers across the pond would have any
experience with something like this.</span></font> <o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p style='margin-bottom:12.0pt'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Brian C.<br>
<br>
--- personal_submersibles@psubs.org wrote:<br>
<br>
From: Alec Smyth via Personal_Submersibles
<personal_submersibles@psubs.org><br>
To: Personal Submersibles General Discussion
<personal_submersibles@psubs.org><br>
Subject: Re: [PSUBS-MAILIST] annealing windows<br>
Date: Sat, 21 Nov 2015 23:00:28 -0500</span></font> <o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Brian,
just to make sure I understand... I presume the window with the hole was a
"placebo" you threw in the oven along with the actual windows, to
monitor temperature rise? Else, if you drilled a partial hole into one of the actual
windows unfortunately my reaction would be a very big UH-OH!!! That would be a
stre! ss concentrator in a spot where you <u>really</u> do not want one.</span></font>
<o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Best,</span></font>
<o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><br>
Alec</span></font> <o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font>
<o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>On
Sat, Nov 21, 2015 at 10:32 PM, Brian Cox via Personal_Submersibles <<a
href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
wrote:</span></font> <o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Had
a weird observation while annealing my windows, I have one window that I
drilled a 1/8' deep hole for a temperature probe so I can monitor the rise of
the acrylic. After the annealing, the one window with the
probe, it's surface was badly melted. The rest of the
windows were perfectly fine. The only difference was that the! window
with the probe has gone through multiple annealing cycles. It was also sitting
on another piece of thick acrylic, but I don't think that would have anything
to do with it's surface being melted.</span></font> <o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Brian
Cox</span></font> <o:p></o:p></p>
<p style='margin-bottom:12.0pt'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'><br>
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