Check out this entertaining mechanical bank with exposed workings. This ingenious device by artist Christopher Blasius came to my attention recently from Dug North's Automata Blog.
It is operated by a hand crank and does a fascinating directional change from circular motion to linear action. The artist is selling plans here and has uploaded an extensive YouTube video showing both the operation and assembly instructions. Worth a view. I'll be adding a link to David's links page for those people always looking for mechanically oriented plans.
Send us photos if you try and make one!
via Dug North