Re: [TCML] Geissler tube or lighting effects

[jhowson4@xxxxxxxxxxx]

I tried to make a helium Geissler tube once but it did not come out too well .   

I got a thissle tube from my chemistry teacher(a glass tube that was about2ft long and less than .5 cm across.) cut the end off and epoxyed a wire in one end.  the other end I epoxyed a threaded connector which I connected a vacuum pump and the helium supply  a valve and a gauge with a wire inside the connections in to the tube a couple of inches.
I drew a vacuum leaked in helium untill the pressure was normal and then drew a partial vacuum and closed the valve.  I tested it at this point  and it looked really nice.  the plan was to use a torch to heat the glass and allow me to melt it closed over the second wire sealing it up. which of course did not work. 

hope this helps (tell you what not to try)
Jay Howson


-------------- Original message -------------- 
From: "Terry Oxandale" <Toxandale@xxxxxxx> 

> I've be unable to locate information on special lighting effects using 
> rarefied gas glass tubes. I've acquired a large (relatively speaking) 
> Pyrex glass tube and am investigating it's use with my coil or other 
> high voltage sources in a special lighting display along with my coil 
> and ladder. 
> 
> Some members have some excellent photos of their examples, but I've not 
> been able to find the more technical, mechanical, and building 
> information relating to these projects. The glass tube I plan on using 
> is 5" by 50" and feel it could be used to provide a nice display. 
> 
> Any help, guidance, or direction in accomplishing this would be 
> appreciated. 
> 
> Thanks, 
> 
> Terry 
> _______________________________________________ 
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> Tesla@xxxxxxxxxxxxxx 
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