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Author: Diesel DamoDiesel Damo Date: May 7, 2008 21:26
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Author: the_dawggiethe_dawggie Date: May 7, 2008 21:51
On May 8, 3:26 pm, Diesel Damo yahoo.com.au> wrote:
Light bulb cam?!?!? LOL!
Interesting that it is not sensitive to vibration, long filament
conventional globes are very much so.
I can't access the quoted web site, comes up with too
busy.
Also does this have a UPS or something? I'd be carefull
power cycling it at all.
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Author: òlléy®òlléy® Date: May 8, 2008 00:11
If it is the fire station bulb, unsure of the exact details however, I heard
or read onetime many years ago that it did in fact fail once and was
replaced albeit a very long time ago, something to that effect.
Hmm I just clicked the link and see they have a camera on it nowadays..
exiting stuff huh? why don't they put a camera on some patch of grass
somewhere and people online can watch it grow :)
regards
olley
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Author: the_dawggiethe_dawggie Date: May 8, 2008 00:16
On May 8, 6:11 pm, òlléy® hotmail.com> wrote:>
>> 108-year-old light bulb - yes, it still works.
>
> If it is the fire station bulb, unsure of the exact details however, I heard
> or read onetime many years ago that it did in fact fail once and was
> replaced albeit a very long time ago, something to that effect.
>
> Hmm I just clicked the link and see they have a camera on it nowadays..
> exiting stuff huh? why don't they put a camera on some patch of grass
> somewhere and people online can watch it grow :)
The cam is likely also a security one :-)
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Author: John_HJohn_H Date: May 8, 2008 01:57
Diesel Damo wrote:
So long as you don't mind the faint red glow of a carbon filament
light bulb. Most people simply chucked them away and replaced them
with tungsten long before they got broken.
They had a stack of 'em in the physics lab when I was at high school
(or was it uni) somewhat less than 108 years ago. The reason they had
them was to demonstrate their negative temperature coefficient of
resistance (NTC) -- ie the resistance decreases as they warm up, which
is exactly the opposite of a tungsten filament.
It is of course the reason why the old carbon filaments didn't often
burn out whereas tungsten filaments do.... Perhaps you've never
wondered why a tungsten filament light bulb only ever blows when you
switch it on (in the absence of vibration or bumping)! You should
also note that this one's hanging on a cord (which protects it from
vibration and mechanical shock).
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Author: the_dawggiethe_dawggie Date: May 8, 2008 02:09
On May 8, 7:57 pm, John_H inbox.com> wrote:> Diesel Damo wrote:
>
>>108-year-old light bulb - yes, it still works.
>
> So long as you don't mind the faint red glow of a carbon filament
> light bulb. Most people simply chucked them away and replaced them
> with tungsten long before they got broken.
>
> They had a stack of 'em in the physics lab when I was at high school
> (or was it uni) somewhat less than 108 years ago. The reason they had
> them was to demonstrate their negative temperature coefficient of
> resistance (NTC) -- ie the resistance decreases as they warm up, which
> is exactly the opposite of a tungsten filament.
>
> It is of course the reason why the old carbon filaments didn't often
> burn out whereas tungsten filaments do.... Perhaps you've never
> wondered why a tungsten filament light bulb only ever blows when you
> switch it on (in the absence of vibration or bumping)! You should ...
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Author: Diesel DamoDiesel Damo Date: May 8, 2008 02:12
John_H wrote:
> Diesel Damo wrote:
>
>
> So long as you don't mind the faint red glow of a carbon filament
> light bulb. Most...
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Author: John_HJohn_H Date: May 8, 2008 02:26
Diesel Damo wrote:
>John_H wrote:
>>
>> Which all goes to show you can actually learn something useful (well
>> almost) in a physics class. :)
>
>Or in aus.cars, as that was news to me :-)
It's also the reason why the tungsten ones last much longer if you
never turn them off!
Haven't heard anything about it lately, so it may have eventually
blown, but there was one in England (in a pub IIRC) that was claimed
to have been running continuously since 1938 or thereabouts.
--
John H
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Author: ScottyScotty Date: May 8, 2008 03:06
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Author: KlompmeesterKlompmeester Date: May 8, 2008 04:17
>
> "the_dawggie" hotmail.com> wrote in message
> news:5104133c-b9d7-45b7-a370-fd5ad32dba45@y22g2000prd.googlegroups.com...
> On May 8, 6:11 pm,
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