# Linkage for the Cissoid

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This linkage is an application of Peaucellier's inversor. Varying the radius of the rods gives rise to a family of cissoids with a bump, a cusp, and a loop.

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Contributed by: Claude Fabre (March 2011)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

In 180 B.C. Diocles solved the Delian problem of doubling the volume of a cube with his cissoid. The linkage was elaborated on in 1869 by J. C. Sturm after Peaucellier made his inversor public in 1864.

Note that Diocles could of course have built this linkage (why not?), which wonderfully explains the geometry of his curve.

## Permanent Citation

"Linkage for the Cissoid"

http://demonstrations.wolfram.com/LinkageForTheCissoid/

Wolfram Demonstrations Project

Published: March 7 2011