Yup.

Being weird, I was thinking of thermometers, pens, urine samples. So yeah...

But I could happily relate to those yards of ale that smash easily (if you read this ex-landloard - I'm sorry).

Quote from Bladerunner :

Most notably, BEER GLASSES!!!

Unfortunately. There is a sad side to the laws of physics

Quote from tristancliffe :

Yup.

Being weird, I was thinking of thermometers, pens, urine samples. So yeah...

But I could happily relate to those yards of ale that smash easily (if you read this ex-landloard - I'm sorry).

I don't want to know why that one came up...

yes but the cog gains altitude as it goes away from the base

its absolutly imposible that gravity raises the cog

i know what you mean so you must know meachanics then you should know is not posible for gravity to raise a cog, and when it leans cog is raised and gravity fights to lower the cog

it would be the weight of pen or umbrella going down to the liquid tending to go down as well which pulls it vertical

they oppose each other so if the umbrella is heavy youd need a lot of water, you could hide a whole liter at the point underneath the fabric

Check out these sites lerts...they may give you some insights...(a bit cheaper than whatever you were smoking anyway! )

http://www.physics.leeds.ac.uk/pages/PerpetualMotion

http://www.flycatfly.com/Flying_Cats.html

http://youtube.com/watch?v=G2IX__disfE&feature=related

Quote from lerts :

yes but the cog gains altitude as it goes away from the base

its absolutly imposible that gravity raises the cog

i know what you mean so you must know meachanics then you should know is not posible for gravity to raise a cog, and when it leans cog is raised and gravity fights to lower the cog

it would be the weight of pen or umbrella going down to the liquid tending to go down as well which pulls it vertical

they oppose each other so if the umbrella is heavy youd need a lot of water, you could hide a whole liter at the point underneath the fabric

Do some careful drawings at 0, 1°, 2° and 5° angles, and you'll see that as it leans the CoG FALLS and MOVES AWAY FROM ABOVE THE BASE. These two factors mean it WILL fall over. However, if the CoG at 90° is higher than that at the point when the base and sphere are both touching the ground it just means it won't settle horizontally, but at an angle.

You haven't invented anything new, or come up with any useful concepts.

Quote from Mazz4200 :

http://youtube.com/watch?v=G2IX__disfE&feature=related

Doesn't that make use of capillary action to work? Or syphoning? Thus making it quite difference. And if your umbrella (or pen) did that sort of motion you'd quickly get annoyed!

Yeah it's capillary action.

Although if you had a small pressure valve in the bulb to expel the excess water, in theory you could make it go on forever. All you'll need is a constant water supply to keep the beaker at the correct level, i.e a rain gully, or even a stream. Then simply attach a little electric motor to the pivot and hey presto you've got yourself a mini generator and all the worlds energy problems are solved. You'd make millions

To be perfectly honest, i still ain't got the faintest idea what the hell Lerts is on about here, but, at least it keeps him off the streets

Quote from lerts :

yes but the cog gains altitude as it goes away from the base

How do you figure? Your grasp on reality is even weaker than I thought.

well ive been thinking all day and i realize using fluid to cause a righting arm is not a good idea

the thing is that i was recalling having built a balnce with a very strong righting arm and finally remembered, and whats great i tested it and it tends strongly to verticality

now i can buy 5 euros umbrellas and selling them for 20 euros modified as magic umbrellas

http://i40.photobucket.com/albums/e2...id/balance.jpg

Um, that would fall over too.

Which bit of "out-of-balance" don't you get? The CoG of your diagram is to the right of the base, and thus it will fall over. You don't need ANY other consideration at this point other than a 'test' a 3 year old could manage (if you told them what to do, obviously).

Take some classes of this.

And you still haven't taken into account that mercury expands and contracts in different temperatures and atmospheric pressure. And gravity. Invent anti-gravity, then you can finish your umbrella stand

all previous examples were wrong what about this one, do you think what im trying to do is posible, i think so:

http://i40.photobucket.com/albums/e222/raaaid/float.jpg

That wont work because the tank holding the floats can fall over as well.

Lerts I don't get it, your trying to get something to self right itself, but the ideas your coming up with are self tipping!

Why dont you just buy sıgaretts ınstead of weed?

I know how to get an umbrella to stay vertical. Put it upside down.

If anyone ever wanted evidence that weed destroys your mind when you use too much of it, they just need to look in this thread. Think about this, would a sane person suggest putting a large amount of a highly toxic liquid into an umbrella? I am however flattered that lerts thought of me.

Mercury is also called Quicksilver

Quote from ATC Quicksilver :

Mercury is also called Quicksilver

Yay, a mercury fountain:

Quote from lerts :

all previous examples were wrong what about this one, do you think what im trying to do is posible, i think so:

http://i40.photobucket.com/albums/e222/raaaid/float.jpg

1. CoG moves away from base with lean angle.
2. Epic Fail.

Quote from wheel4hummer :

Yay, a mercury fountain:

Ooh, Alexander Calder. I saw that last year - it's installed in the Miro Foundation in Barcelona.

This thread could go into failblog...

But the idea is intereting. How do you make an umbrella stand upright by itself? I was thinking a little bit about this... and the answer is simple.

You don't need something to balance it out... and who would seriously carry around a liter of water (1KG!) in an umbrella?! Before you make such an invention, you should think about how "comfortable" it will be to use. For sure, i wouldn't buy an umbrella that comes with a 1 liter bottle of soda attached to it...

But as i said, the answer is simple. What you need for an umbrella not to fall over, is a TRIPOD!

You'll need a small tripod, that's not heavy, and is attached to the umbrella. It could look a little something like in the picture i've attached. That's just an idea tho... in the end, it doesn't matter how the mechanism would work exactly. As long as you can "activate" a little tripod on your umbrella, it'll work.

Depending on how big you make the tripod (can't be too big tho), the umbrella will stand more or less stable, but will still be easy to knock over (even a little bit of wind can do that). But basically, it would not tend to fall over by itself anymore.

So there, i saved the day for you lerts, you can stop thinking too hard now, and produce such an umbrella and sell it.

There are only two questions left...

Will you spend more money on producing the umbrella than a new G25 would cost you?

and

Will people buy the umbrella, because a "self standing" umbrella is what they've been waiting for since many years (i certainly wasn't)?

cheers

seriously, instead of that liquid thing, use the same system as this:

http://www.mevrouwdeuil.nl/ima ... tuimelbeker%20nijntje.jpg

because that WILL work.

how about a motor and hiller paddles?

how about a helicopter, i just came up with that word, no one ever invented that