This project let me apply my knowledge of mechanisms to piece together a custom, purpose-built design. Using Lego parts resulted in easy prototyping, but in order to be used on glasses, the mechanism would need to miniaturized. In addition, to clean two lenses at the same time, one could employ a polygraph mechanism, consisting of two parallelogram four-bars, to copy the single output of my mechanism.
Figure 7. John Hawkins’ 3D polygraph mechanism;
This design employs TWO pairs of parallelogram four-bars to copy motion through 3D space. My wiper design only needs half of this mechanism to copy motion across a 2D plane.