A medieval miner is sawing off a beam for supporting a tunnel.

A medieval miner is sawing off a beam for supporting a tunnel.

The rotation of the crank  is converted by an oscillating lever into the movement of the saw.

Author: Walter Ruffler
Crank mechanism Size: 14 x 6 x 23 cm
2 construction sheets DIN A 4

Difficulty class: middle

Published by: Walter Ruffler Paper automata