mel jacobson on tue 22 nov 11
i know mine work with a plugged hole, it is just that often
steam/water seals the tops./ but.
mine are really tight when i make them.
mr. uchida would come back from the dead
if i made klanky covers.
smack my forehead.
but, as always, information gets passed here
on clayart. the hole in the cover is traditional
and it helps.
like the gas can...the vent hole is essential.
from: minnetonka, mn
clayart link: http://www.visi.com/~melpots/clayart.html
David Hendley on tue 22 nov 11
Sorry, the EPA has rescinded the laws of physics.
You see, a vent hole in a gas can might allow some vapors to escape, so it
was mandated that there can be no more vent holes in gas cans. Go look
at new gas cans in a store.
Let's hope they don't set their sights on teapots.
Of course the new gas containers don't work worth a darn - it takes well
over 2 minutes of glub-glug-glug-ing to put 5 gallons of gas in my tractor
tank with my new gas can.
----- Original Message -----
> like the gas can...the vent hole is essential.
> from: minnetonka, mn
> website: http://www.visi.com/~melpots/
> clayart link: http://www.visi.com/~melpots/clayart.html
Des & Jan Howard on wed 23 nov 11
My fuel drums have swap-over nozzles/caps.
The nozzles have 2 tubes running parallel as a figure 8
on it's side. Fuel comes out of big tube, air goes in
smaller tube. No glug-glug.
On 23/11/2011 4:24 PM, David Hendley wrote:
> Sorry, the EPA has rescinded the laws of physics.
> You see, a vent hole in a gas can might allow some
> vapors to escape, so it
> was mandated that there can be no more vent holes in
> gas cans. Go look
> at new gas cans in a store.
> Let's hope they don't set their sights on teapots.
> Of course the new gas containers don't work worth a
> darn - it takes well
> over 2 minutes of glub-glug-glug-ing to put 5 gallons
> of gas in my tractor
> tank with my new gas can.
Des & Jan Howard
02 6373 6419
Roland Beevor on thu 24 nov 11
A finely described experiment, but I'm curious to know
whether the same effect can be replicated in other
laboratories, with other people's teapots and most
importantly with tea? Does the 'bath water goes down
the other way in the Antipodes' factor come into play?
I must admit that my efforts are puny compared with
yours. I was able to show a difference between holding
the hole shut and letting it open, but although there
was less flow in the former condition I didn't get much
of a glug.
I couldn't hold the lid down firmly while pouring and
take a photo at the same time, so I've only got a video
for evidence, its on the blog:
Also I was too much of a coward to try with boiled
water, only having a steel tea pot to hand. But wait,
there's a Harry Davis teapot on the dresser...
This gives a much more convincing demonstration of the
need for a hole. With the elastic band in place and
the hole covered there is no flow at all! Even without
the seal there is a big difference, though still no glug.
On 24/11/2011 04:00, ivor and olive lewis wrote:
> By way of experiment I took a teapot and filled it
> with water to the rim of
> the gallery.
> The spout rim, being horizontal in the plane of the
> gallery rim filled with
> water. The rim of the gallery was sealed with a cover
> so that there could be
> no leakage of water or ingress of air into the body of
> the pot..
> The pot was then slowly rotated. After rotating about
> two or three degrees
> water flowed forward creating a meniscus bulge which
> broke over the front
> edge of the spout allowing air to flow into the
> entrance of the spout body.
> A bubble of air moved into the body of the tea pot
> allowing more water to
> flow forward and spill over the edge of the spout.
> The pot was rotated slowly until the rim of the spout
> was vertical. This set
> in motion a pulsation of alternating surges of water
> escaping from captivity
> and small volumes of air rising into the body of the
> spout, through the
> strainer and into the pot body which continued until
> all of the water was
> drained from the pot.
> I found that if the seal with the gallery rim were
> temporarily broken water
> flow accelerated to become a continuous stream then
> returned to a slow
> pulsing flow when the seal was restored. The
> restricted flow of water was
> accompanied by a gurgling noise.
> This behaviour was common to several Tea pots.
> An image of one of tested pots has been sent to Mel.
> The answer to his question "How else do you explain
> ......that a gas can
> without venting will not pour?..." seems to be "It
> will pour but rather
> untidily if not dangerously ! !".
> In this valid example, My solution, when preparing
> 2-stroke fuel, is to
> orient the orifice to the north then to tilt the can
> slowly so that air is
> drawn in smoothly over the liquid that is moving from
> the can. (Note, I do
> not start with a can that overfilled. 4 litres in a 5
> litre can is
> adequate)The smooth transition of the unmixed fuel
> into the measuring jug as
> air is drawn into the can is drama-less and does not
> require a ventilation
> pipe. Air pressure is constant inside and outside the
> Quod erat demonstrandum.
> My regards to all.
> Ivor Lewis,
> South Australia
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.1873 / Virus Database: 2101/4636 -
> Release Date: 11/24/11
Lee on thu 24 nov 11
My kerosene plastic jerrycans have a screw top closed air vent
opposite of the spout on top of the can. You take the vent cap off
when you dispense the kerosene.
=3DA0Lee Love in Minneapolis
=3DA0"Ta tIr na n-=3DF3g ar chul an tI=3D97tIr dlainn trina ch=3DE9ile"=3D9=
7that is, =3D
land of eternal youth is behind the house, a beautiful land fluent
within itself." -- John O'Donohue
Bonnie Staffel on fri 25 nov 11
Lee, your kerosene experience reminds me of the time when we lived a
primitive life in a little cabin in northern Indiana. We heated with a
kerosene tank behind the house. One cold night the stove would not fire =3D
give us any heat although the tank was full. The oil man told us that =3D
little lid had to not be screwed on so tight so that air could go into =3D
tank for the oil to release into our stove. Good lesson here.=3D20
Lots of adventures went into existing in that cabin from bringing home =3D
our little red wagon, block ice for our ice box to the time when =3D
struck because there was no ground wire on the electric line. Cooked and
baked on a tiny kerosene stove, with moderate success with the cinnamon
rolls I made for my husband when he came back from every week in Chicago =
the commute train ran the wrong way at the wrong time. He brought home a
puppy to keep me company while he was gone. We were city folks and had =3D
learn how to survive as newlyweds in this little two room cabin. When my
perfectionist husband had to dig a new outhouse hole in the back of the
property, it was the squarest hole ever seen by the local farmers. The
neighbor's cows in the adjacent pasture made scary noises during night
visits to the outhouse. Had to hand pump water from the well, the best
drinking water ever tasted. The night of the lightening strike, I had
luckily put off taking the usual sponge bath at the kitchen sink as that =
the grounding place for the lightning to get through. Tore the roof =3D
well as exploded the spice boxes in the cupboard over the sink. Farm =3D
are ingenious hoarders of necessary stuff. Searching found a tarp in the
landlord's barn to cover the hole in the roof.=3D20
No television then, as it predated common usage. Just enjoyed the radio =3D
an antenna wire circling the top of the wall in the house. Our other
neighbor's wife was a sure shot with her pistol. One night she heard her
chickens squawking so she went to the coop and found a possum daring her =
shoo him out. She disposed of him quickly with just two shots.=3D20
Another event happened after our puppy grew into an adventurous dog. She =
the neighbor's dog decided to have some fun with the six ducks we were
raising for Christmas gifts for our relatives. They managed to separate =
from the flock and were in the field behind our place running circles =3D
the poor duck grabbing feathers and tossing them into the air. Well, no
farmer will stand to have such dogs on their farm so a lesson had to be
taught. We hung the dead duck from my dog's neck so she was reminded of =3D
for hours. She never touched a farm animal since..=3D20
As I was raised in a rather upper class big home in town, my father was
aghast at the living conditions his little girl was experiencing so =3D
offered us a job taking care of his three story rooming house in =3D
Toledo to have a better place to live. More adventures occurred after =3D
move, and the beginning of my clay career opened up new challenges.=3D20
It would take a book to tell our stories as artists trying to make a =3D
for ourselves. Maybe some day.=3D20
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