|Project by mtairymd||posted 02-14-2016 05:05 PM||1351 views||5 times favorited||8 comments|
This mechanism consists of a base with two slots intersecting at right angles. Two sliders are confined within the slots and are attached to a handle by pivots (screws) at fixed positions along the handle. The mechanism can be used for drawing a perfect ellipse. This is done by positioning a writing utensil at the end of the handle while making a full revolution. For more information/history, see here.
With that said, it is often sold in novelty shops with interesting names like Bullsht Grinder, Bullsht Masher or Do-Nothing Machine. Interestingly, most of the names are preceded with state names such has Arkansas, Kentucky, etc. I guess that’s how locals make fun of their neighbors
Video of Build