03 Jul 08 23:46, Mark Lewis wrote to Roger Nelson:

 ML> Hi Roger,
 ML> On , you wrote me:

 ML>>> FWIW: the last time was about 5 or 6 years ago when i was asked to
 ML>>> perform this very activity to prove to someone else who also didn't
 ML>>> believe it... that was when the shed was pretty much destroyed by
 ML>>> the blast... i think we used a bit too much stuff when we mixed it
 ML>>> all together... oops :|

 RN>> WHy not simply unseal the bulb from the base?

 ML> because the metal base is glued on after the two pieces of glass are
 ML> sealed together... the glass still has to be pierced somehow to be
 ML> able to put anything inside it... check it out the next time you have
 ML> a blown conventional light bulb ;)

 ML> http://home.howstuffworks.com/light-bulb1.htm has a decent drawing of
 ML> a light bulb structure... however, i've never seen one with the brown
 ML> area they are calling "insulation"... even watching them make light
 ML> bulbs on "how it's made" and "how do they do
it" don't show any kind
 ML> of "insulation" like that... simply the "glass
mount" (the tower
 ML> inside) with the filament attached in it and the outer
"bulb" part...

 ML> the "glass mount" section has a large "foot" on
the bottom of it and
 ML> when they put it together with the outer bulb part, both pieces then
 ML> go thru a flame processing that melts the two pieces of glass
 ML> together and seals them into one solid unit... now you have a
 ML> completed blub with the two wires sticking out of it that go to the
 ML> element... the next step is for someone to manually put on the daub
 ML> of "glue", stuff the two wires thru the aluminum base,
stick it down
 ML> to the "glue", trim the wires and solder them to the two
pads... once
 ML> that's done, the thing goes to testing to make sure it burns properly
 ML> ;)

They actually use a 'sprew' to vacuum the bulb and then fill it with gas.
The gas they use helps the tungston to last longer than it would if it
were in oxygen (air). When they're done, the cut off the sprew.

                R\%/itt



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