From pernic@hale.yerkes.uchicago.edu Wed Feb 14 11:59:25 1996
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Date: Wed, 14 Feb 1996 12:05:11 -0600
From: Bob Pernic 
Message-Id: <199602141805.MAA17078@hale.yerkes.uchicago.edu>
To: jdotson@belmont.astro.nwu.edu
Subject: Re: meeting with jeff
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Jessie,You may want to pass this on to Jeff; I don't think you will get a
reply from Indium couporation on gland diamensions.  Here is what I know
works; The indium gland and "o" ring gland are not compatable. I think the
best way to handle it is to have two oring glands next to each other so
that one can use either ( or both ). The standard gland Jeff knows how to
do so that is not a problem. The other is not either, but is quite different.
The female half of the gland looks exactly like that of the ordinary kind.
The male part is not flat but purtrudes into the groove.It should have only
enough clearance so that it can be easily assembled, ie a couple thousands
on the sides and zero clearance on the bottom. For the indium itself, one
lays a wire in the corner of the groove, letting it overlape alittle. When
one tightens the many bolts with beleville washers ( to provide a constant
pressure ) the indium flows everywhere up the side clearances seals. Actually
the indium wets the aluminum. It is extremeely important that "jack" screws
be provided to facilitate disassembly. Gland size in not at all important.
It's that flowing action that's wanted. I've made glands typically about
0.1 deep and 0.1 wide. But they surely could be smaller.  Now you know
everything  I do, Tootle-Do