This project was the 'mark' device required for a 'measure, mark, cut' assignment.

Utilizing a unique micro-pulley system, this device actually demonstrated some functionality. The concept was to create a drawing device similar to a compass that would be able to draw an accurate and adjustable ellipse shape. This was achieved through a mechanism that would retract or expand the legs of the device while the drawing insturment rotates around the two points while being constrained by an adjustable belt.

A 'working' prototype of this device was constructed of soldered brass square, round, and rectangular tubing. The rendering below is computer generated for clarity. The legs would adjust proportionally by an internal system cord wrapped around a central axle. Turning the red wheel under the knob to the right would extend the legs, turning to the left would retract them.