D10. Double Slider Ellipsograph
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In this double-slider mechanism a plate is attached to one of the moving links. As the motion proceeds, a piece of chalk fixed to an arm will trace out an exact ellipse. See movie D-10a. Reuleaux attributed this device to Leonardo da Vinci

Reference :
Gelsone, Kathryn (Technician)
Peck, Susan (Technician)

Models :