In December 1999, while at the Boston Museum of Science for the Massachusetts FIRST LEGO League competition, I saw a kinetic sculpture that inspired me to make a model of it out of LEGO (see Figure 11.27).
Figure 11.27 A kinetic sculpture at the Mathematica exhibit at the Boston Museum of Science.
Here is the note that was next to the sculpture:
The model was an example of how an early designer (Sarrus) figured out a way to turn rotational motion into up-and-down motion. Unlike the rack-and-pinion alternative, this transfer of motion happens without any sliding. Some people had said that it couldn't be done, but he proved them wrong. Using a worm gear and the largest white hub, I made a model of this sculpture out of LEGO (see Figure 11.28).
Figure 11.28 The linkage system from the Boston Museum of Science realized in LEGO. A worm gear on the motor slowly turns a 40-tooth gear.