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Can you guess what this object is?

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Neil Wyatt06/06/2020 12:42:04
17902 forum posts
706 photos
77 articles

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!



Martin Connelly06/06/2020 12:51:08
1369 forum posts
159 photos

Stephen Fry had one on QI.

Martin C

Alan Johnson 706/06/2020 12:52:30
84 forum posts
13 photos

As Alice said "curiouser and curiouser"

not done it yet06/06/2020 12:58:49
4655 forum posts
16 photos

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
1818 forum posts
45 photos

Looks like the Pope's hat to me

blowlamp06/06/2020 13:47:34
1347 forum posts
84 photos

It looks like 4 half cones placed back to back and joined.

AdrianR06/06/2020 13:48:39
476 forum posts
23 photos

Well from the image I can say it is unusual in that it has one side, two edges and four corners.


Sandgrounder06/06/2020 13:50:33
192 forum posts
6 photos

I think it's a face mask before the ear loops are sewn on.

JasonB06/06/2020 16:00:48
18134 forum posts
1996 photos
1 articles

I think it could replace a wet finger.

Danny M2Z06/06/2020 16:13:19
850 forum posts
282 photos

!/2 of a futuristic bra?

pgk pgk06/06/2020 16:18:01
1807 forum posts
288 photos

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
1115 forum posts

Looks like a Mobius strip to me.


lfoggy06/06/2020 17:10:05
146 forum posts
1 photos

Looks a bit like my son's cycling aero 'time trial' helmet.

Neil Wyatt06/06/2020 17:16:34
17902 forum posts
706 photos
77 articles

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...


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

Mike Poole06/06/2020 17:48:51
2576 forum posts
60 photos

A tricky thing to measure I would thinksmiley


JasonB06/06/2020 18:31:36
18134 forum posts
1996 photos
1 articles

I'm waiting for Neil to make a metal onedevil

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