An animated depiction of the <a href="https://en.wikipedia.org/wiki/en:Sarrus_linkage" class="extiw" title="w:en:Sarrus linkage">w:en:Sarrus linkage</a>
<a href="//commons.wikimedia.org/w/index.php?title=User:Van_helsing&amp;action=edit&amp;redlink=1" class="new" title="User:Van helsing (page does not exist)">Van helsing</a>
CC BY 2.5
self-made largely based on <a rel="nofollow" class="external text" href="http://pergatory.mit.edu/2.007/contests/2000_sojourner/lectures/Lecture02/Lecture02-supplement.html">an image at pergatory.mit.edu</a>