About the birth of a chain block
Chain block chain is "chain", block means "pulley", and is a tool for raising and lowering heavy objects using the principle of levering and pulley.
The principle of leverage was said to be mathematical evidence carried out by Archimedes in Greece around 200 BCE.You can lift many times the weight by hand by wrapping it around multiple pulleys with one rope as seen on the rod of a well, tie one end to a heavy object and pull the other end by hand.
Meanwhile, there is a need for a braking system to keep the lifting weight in place.This is difficult by the pulley method, so instead of a lead, a gear system instead of a pulley, a braking device for stopping and a hand chain to roll it down.
This is how a chain block winder is made.