Trammel of Archimedes
grabcad
The animation video showcases a mechanism with three intersecting slots on its base, which houses three sliders attached to a handle via pivots at distinct points. Often seen in novelty stores under various amusing titles like "Bullsh*t Grinder," "Bullsh*t Masher," or the "Do-Nothing Machine," these items typically bear state names as prefixes, indicating local humor. Build instructions for this mechanism can be found here: http://www.instructables.com/id/Trammel-of-Archimedes-3D-Print/. Additionally, a 3D print video of the mechanism is available at https://www.youtube.com/watch?v=bo5jpwA4kI8, and an animation video can be viewed on https://www.youtube.com/watch?v=NtgNvT4Yaaw.
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