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Can you guess what this object is?

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Neil Wyatt06/06/2020 12:42:04
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I happened upon this geometric object by chance earlier. It has several interesting properties. If you already know it, don't spoil it for others just yet, but if it's new to you can you guess what some of these are?

It was very easy to create in Alibre (and in any other CAD program) too!

Neil

object.jpg

Martin Connelly06/06/2020 12:51:08
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Stephen Fry had one on QI.

Martin C

Alan Johnson 706/06/2020 12:52:30
106 forum posts
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As Alice said "curiouser and curiouser"

not done it yet06/06/2020 12:58:49
6319 forum posts
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Guessing it is a shape that maintains the same height whichever way it is stood or while rolling. In other words a peculiar shaped ‘ball’? If I am correct, I have no idea of what other properties it may have. 3-D computer mouse maybe?

Jeff Dayman06/06/2020 13:39:18
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Looks like the Pope's hat to me

blowlamp06/06/2020 13:47:34
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It looks like 4 half cones placed back to back and joined.

AdrianR06/06/2020 13:48:39
540 forum posts
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Well from the image I can say it is unusual in that it has one side, two edges and four corners.

Adrian

Sandgrounder06/06/2020 13:50:33
229 forum posts
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I think it's a face mask before the ear loops are sewn on.

JasonB06/06/2020 16:00:48
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I think it could replace a wet finger.

Danny M2Z06/06/2020 16:13:19
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!/2 of a futuristic bra?

pgk pgk06/06/2020 16:18:01
2317 forum posts
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A high status tanzanite sugar scoop.

camper06/06/2020 16:58:29
12 forum posts

a factory local to me made thousands they thought they were ball bearings, the joys of centreless grinding

Andrew Tinsley06/06/2020 17:05:52
1480 forum posts

Looks like a Mobius strip to me.

Andrew.

lfoggy06/06/2020 17:10:05
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Looks a bit like my son's cycling aero 'time trial' helmet.

Neil Wyatt06/06/2020 17:16:34
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NDIY is closest, it keeps the its overall height and that of its centre of gravity constant as it rolls.

It's called an Sphericon (I'll have forgotten taht by tomorrow) basically a square with two half-cones on each side, at ninety degrees to each other.

From wikipedia:

Next Andrew - it was discovered by a someone trying to carve a mobius strip without a hole in it.

 

Oops - muddled it up with the similar Oloid...

 

They would actually work as ball bearings - but only between two flat surfaces...

Neil

Edited By Neil Wyatt on 06/06/2020 17:18:38

Mike Poole06/06/2020 17:48:51
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A tricky thing to measure I would thinksmiley

Mike

JasonB06/06/2020 18:31:36
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I'm waiting for Neil to make a metal onedevil

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