# Search Results for “Trammel-2”

##### Inverted Trammel 2

Archimedes trammel draws an ellipse if used properly. Turning the trammel upside down gives a curve which is certainly not an ellipse.##### Inverted Trammel

Archimedes trammel draws an ellipse if you fix the base and move the handle. What happens if you fix the handle and move the base? Drag point D to find out. See the curve.##### Trammel foci

Altering |AB| and |AC| changes the ellipse. Can you find a relationship between |AB|, AC| and |DE|, the distance between the foci?##### Archimedes Trammel

Two points on each hand slide in perpendicular grooves. The end of the hand traces an ellipse. This device was invented by Archimedes and is called Archimedes Trammel. I?ve also heard it called the*Cincinnatti do-nothing machine*and the

*Bulls**t Grinder*. Watch the clock, in Cincinnatti or elsewhere, but don't do nothing. And don't grind, especially your teeth.