It is a cylindrical pin lock.
Inspired by the Egyptians
About 4,000 years ago, the ancient Egyptians used similar locks with marbles, but these locks were very large (about 30 meters long) -60?cm), made of wood.
What is a pin tumbler lock?
A pin pin lock is a lock structure that uses multiple pins of different lengths to prevent the lock from being opened by incorrect keys.
The shell of the pin lock has a cylindrical hole with a built-in lock cylinder or metal pin. The lock structure uses multiple pins of different lengths to prevent the lock from opening. To open the lock, the lock cylinder must be rotated, and the correct key is used to do this.
The pinball design is based on a drilled main lock cylinder, usually with 5-6 lock head slots arranged closely in a straight line. A metal pin (or "lock pin") is pressed against the wall of each slot. Another metal pin (or "flat-head pin") is located above the lock core pin, and is pressed down on the lock core pin by a very small coil spring. The spring is located in the lock housing and can be permanently compressed. ?
Ninus Yale Jr.'s tumbler lock was similar to locks designed by Ninus Yale Sr., but used a smaller flat blade key with a serrated edge, like we still use today The key is the same. When inserted into the lock, the key pushes the bottom pin down into the proper position where the user can turn the key and open the lock.
The cylindrical pin lock using a flat key was patented in 1861.