h a l f b a k e r yInexact change.
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Like a regular candle, but spaced evenly along the
wick
are bubbles of carbon dioxide. As the wick burns down
and exposes a bubble the CO2 is released, snuffing the
candle. That way you don't accidentally forget and
leave
a lit candle burning all night.
Candle Snuffer
http://www.youtube....watch?v=von6umef9qk
But nowhere near as good as exploding CO2 bubbles. [mitxela, Jun 17 2014]
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Annotation:
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I don't think it would work, unless the CO2 were
under pressure. Otherwise, the CO2 is going to
emerge slowly as the flame starts to melt into the
bubble, producing a trickle of CO2 which will
dissipate without extinguishing the flame. |
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A pressurised bubble might work, as it would burst
as soon as the wax around it got hot enough,
creating a sudden pulse of CO2. |
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The idea is neat because the candle can be relit
after its been extinguished in this way. |
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So, [+] because it's a cool idea. |
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What Max said, plus I, too, echo the thought of being
able to relight it. I use a candle every morning for my
meditation ritual and would love to have it timed to
go out after an hour. One inch down would be one
hour, two, another hour, and so on. Brilliant + |
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Perhaps a pellet of dry ice, encased in paraffin, then the
entire thing embedded in a candle, would serve to create a
pocket of pressurized CO2. |
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I like. + I burn a candle every night in my living room
and sometimes I do fall asleep on the couch! |
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While the pressurized CO2 would probably aid in
putting out the candle, it would probably result in
a splattering of hot wax everywhere. |
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I'm wondering if you could do this with one of two
variations of wick interruption. |
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The first would have two wick columns, with each
one being made up of multiple sections of ~1hr
burn time, with ~30 minutes between sections.
The two columns would be far enough apart that a
flame on one couldn't light the other. You light
one, and it melts the candle far enough to expose
the other column before extinguishing, and you
switch back and forth. |
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Alternatively, crimp a small metal ring/cap on the
wick every so often. As the candle burns down, it
can't draw wax past the cap, so it goes out. Since
it probably will have charred the wick down into
the cap (which is only crimped at the top), you
can break the cap off, exposing the clean wick
below it. |
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Right. We don't need pressurized CO2 or other
clevelry. |
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All that's needed is a bubble of water, shirley? |
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So, how to make the candle? First, you take a
length of wick, and soak it in candlewax (so water
won't wick along it). |
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Next, place the wick in a sort of tray which has
recesses, connected by a groove, every 2cm. The
wick lies in the groove and runs along the
recesses. |
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Next, push the wick down into the recesses. |
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Next, put water into each recess. |
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Then freeze down to, say, -20°C or so. |
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Remove wick, with little ice-cubes attached like a
necklace. |
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Then quickly dip this wick in wax, just above its
melting point. The wax should form a shell over
the whole thing, before the ice melts. |
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Then you just keep dipping, in the usual way, to
build up a candle with little water pockets
trapped at intervals. |
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20% of retail will be sufficient. |
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Water is a no-go: it's too likely to keep the candle
from being re-lit later (will settle into the candle) |
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// water ... will settle into the candle // How, if
the wick is pre-soaked in wax? Yeah, you'd have to
dump out the water before lighting, and maybe in
some situations the wax will cover the water again,
requiring puncturing the water pocket in order to
dump, but there should be enough wax in the part
if the wick that was previously submerged that it
can get going and vaporize any remaining small drips
of water. |
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