The Pendulum

I don't know why it's called this, but I probably wouldn't want to correct the guy who made it lol.

What you're looking at is an extremely simple design, and an extremely effective one to get confessions. What would happen is the victim would have his/her hands tied behind their back and then have them secured to the rope, then the torturer would slowly crank it so your arms would slowly rise, eventually dislocating your arms at and causing immense pain. (as shown here)