YALE LOCK Introduction: In 1861, Yale Jr. designed the cylinder pin tumbler lock, which was a lot less weight than his father design and could be opened with smaller keys. His father Mr. Linus Yale designed a lock system which was wooden and bulky. Working of Lock system: Yale Jr. lock works, when a key inserted into the cylinder lock, it pushes the bottom set of pins into alignment, when key matches to lock then all set of pins perfectly insert into the serrated edges to the key. Lock consists of two jaws, one holding all the set of pins with spring action to enter into key jaw. Key easily enters into key jaw when it matches, all the pins in the second jaw perfectly come out of it into key jaw in a plane alignment. When the key rotates, key jaw itself rotates to unlock the system, i.e, all pins align over the jock to unlock the lock. These locks were amenable to mass production with affordable price. Source of this article: 1001 INVENTIONS THAT CH...