Illuminated and non illuminated. Can also use lenticular printing. The device is so designed as to allow one to draw a diversity of curved lines or circles with accuracy. The device is also designed so as to allow one to draw curved lines and circles without line drift or sharp points that make holes in drawing surfaces or people. The device also may be constructed in different sizes.
System is based on a combination of memory metal and constant tension springs.
Opens and closes venetian blinds. No motor required. Reacts to temperature. Components are readily available and simple to assemble. Also patented in several European countries.