Cap Safety System

To: tesla-at-pupman-dot-com
Subject: Cap Safety System
From: "Thomas McGahee" <tom_mcgahee-at-sigmais-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Thu, 15 Oct 1998 12:43:27 -0600
Approved: terryf-at-verinet-dot-com
Marco,
Attack the problem from a different angle:
Instead of trying to cram some compressible object that can stand up
to the vacuum process inside the cap chamber, instead use an
external expansion device. OK, imagine your cap is filled to the
gills with oil and has a hose connected to a polyethelene bag
that is loosely inside an appropriate container so it is protected.
The appropriate bag container, (not the bag), would be freely open 
to the atmosphere.

If your cap when POOF it would surge oil into the bag which could
readily expand, containing the overlflow. This method also allows
regular expansion/contraction of the oil due to temperature. 
Because the bag is sealed, the oil in the system will not get 
contaminated under normal use. The negative, of course, is that
you now have this extra thing to contend with. By the way, a
single expansion bag might be able to be shared by more than
one cap. By the way, the expansion of the oil would make a fairly
good indicator of internal oil temperature so you would have some
visual warning of heat build-up.

Just a thought.
Fr. Tom McGahee

----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Compressible stuff in your capacitor
> Date: Thursday, October 15, 1998 2:50 AM
> 
> Original Poster: Marco Denicolai <marco-at-vistacom.fi> 
> 
> At 11:27 14/10/98 -0600, you wrote:
> >Original Poster: "Harri Suomalainen" <haba-at-cc.hut.fi> 
> >
> >Nobody suggested this one so I will: If you like a closed cap
> >and yet want to use it at any directions you can put something
> >compressibble inside the cap. Then, just fill it up with out and
> >leave no air space. I can imagine something like a bagfull of
> >air could do the trick. That should just be strong enough to not
> >break with the vacuum!
> >
> 
> Good idea, but... What you can fill with air, can be compressed but won't
> break or leak? Or what material can be sufficiently compressed (losing
volume)
> and doesn't contain air?
> 
> What I have been thinking, instead, is to use a pressure security valve to
> screw on one of the two capacitor caps (or on the box wall). An easy
> alternative
> could be one of those from italian style coffe cookers: they have always got
a
> small one screwed on the side. 
> 
> The problem is that probably their trigger pressure is too high for our
> purpose: I have to look around for something like those.
> 
> 
> 
> ________________________________________________________________________
> 
>  Marco Denicolai                   Vista Communication Instruments, Inc.
>  Hardware Development Manager      www.vistacom.fi   
> 
>  marco-at-vistacom.fi                 Kaisaniemenkatu 13 A
>  fax:    +358-9-622-5610           SF-00100 HELSINKI
>  phone:  +358-9-622-623-15         Finland
> 
>    Remember, Murphy was an optimist! I am not...
> ________________________________________________________________________
> 
>