Lemniscate Plotting Device

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The center of a bar moves along a lemniscate if its two ends are moved around two equal circles in opposite directions.
Contributed by: Sándor Kabai (December 2007)
Open content licensed under CC BY-NC-SA
Snapshots
Details
In certain mechanical equipment this phenomenon is the basis of linkages that use the nearly straight central part of the lemniscate.
Permanent Citation
"Lemniscate Plotting Device"
http://demonstrations.wolfram.com/LemniscatePlottingDevice/
Wolfram Demonstrations Project
Published: December 10 2007