2013/8/30 Nick <n...@desmith.net> > *From:* neoni...@googlegroups.com [mailto:neoni...@**googlegroups.com] *On > Behalf Of *Dekatron42 > >> *Sent:* woensdag 28 augustus 2013 23:29 >> *To:* neoni...@googlegroups.com >> >> *Subject:* Re: [neonixie-l] Re: Something for the tube/nixie making >> people? >> >> If I remember correctly there is at least one patent on Nixies that >> mentions 2.5mg and/or 3.5mg of mercury, and it also discusses several >> methods of releasing the mercury from the small glass capsules - I can't >> find the patent right now but I think it was a patent by Burroughs as I >> remember that one picture showed exactly how they have done it in their >> B5092 Nixie. >> >> > ISTR that this was done by having the Hg in a small piece if glass > capillary tube (a few mm long, maybe 4mm?) and released by induction > heating. This is how the Hg was measured too - just dip the end of the > small capillary tube in to a pool of Hg and a standard amount is drawn up. > You can see these empty capillaries in the bases of some larger tubes... > > >
There should not be any air in the capillary, You have to prepare a procedure on its end will be a small sealed capilalry tube with tiny drop of mercury but *without* air, just a vapours of mercury. Once cubic millimeter of air will have a volume of 40 cubic millimeters in a tube with pressure around 20torr and that would certainly lead to shorter lifetime.. The getter could take care about it, but it is quite clumsy solution. -- Dalibor Farny http://dalibor.farny.cz -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CA%2BnkT5pkORaG0Fnj6ztiahcdBeaj7gohazijqHWY%3DUN8RXG9%3Dg%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
