B Help identifying a mathy thing

[YoungPhysicist]

Recently, I saw my friend drawing cool, flower like graphs that looks like the path of electrons in atoms and he drew it with device with gears and holes with gears. What's that called?

 

[hilbert2]

Flower of life?

Circles of Apollonius?

 

[YoungPhysicist]

Flower of life?

View attachment 236802

Circles of Apollonius?

View attachment 236803

No.Looks more like this:

 

[hilbert2]

Then it could be the rhodonea curve: https://en.wikipedia.org/wiki/Rose_(mathematics)

 

[YoungPhysicist]

Then it could be the rhodonea curve: https://en.wikipedia.org/wiki/Rose_(mathematics)

That looks quite like what he drew,but can that be drawn by gears(the wheels with teeth on them) and gear-holes?

I believe it is some sort of toy since he said he get it from a stationery shop. And that looked way to complicated to be a toy.

 

[hilbert2]

Maybe it's some kind of a more sophisticated version of a "ruler and compass" geometric construction.

 

[YoungPhysicist]

I found the device! Still don’t know the English name though.

 

[OmCheeto]

... Still don’t know the English name though.

I've only ever heard them called Spirographs.
First introduced here in the states in 1966, when I was about 7 years old.
I'm pretty sure my siblings and I nearly bankrupted our parents in paper & colored pen costs.

 

[YoungPhysicist]

I've only ever heard them called Spirographs.
First introduced here in the states in 1966, when I was about 7 years old.
I'm pretty sure my siblings and I nearly bankrupted our parents in paper & colored pen costs.

Yeah,the exact same thing! Thanks @OmCheeto and @hilbert2!

 

[OmCheeto]

Flower of life?

View attachment 236802

I remember making those! All you needed was a pencil compass and paper.

Circles of Apollonius?

View attachment 236803

I do not remember ever doodling one of those as a child.