1. Field of Invention
The invention relates to instruments for drawing an ellipse and more particularly to an improved instrument for drawing an ellipse or a closed line having three or more arcuate portions.
2. Description of Related Art
There have been numerous suggestions in prior patents for instruments for drawing an ellipse. For example, U.S. Pat. No. 4,182,043 (“the '043 patent”) describes a drawing instrument for an ellipse. However, the '043 patent is limited in drawing different shapes of ellipse. Thus, continuing improvements in the exploitation of instrument for drawing ellipse or the like are constantly being sought.