The attitude adjuster crank machine

If you are a certain age, you recognize this. It was in every classroom. For the youth, this was originally only found in Catholic schools and it spread. It is an Attitude Adjuster. If, like me, you had a big mouth, nuns would stick threaten to stick your finger in this until you quieted down or moved out of the district.

It also sharpened pencils.

(Image courtesy Coyau – Wikimedia Commons – CC BY-SA 3.0)