Who invented the clamping mechanism that made elevators significantly safer and led to dramatic changes in cities worldwide?

The one that invented the clamping mechanism that made elevators significantly safer was: Elijah Graves Otis

Before his invention, Elevators could only be used to carry out things with small weight, since most elevators couldn't sustain heavy objects and often fall. After his invention, a stronger restraint for the elevator is formed and it became safe enough to carry out a several people.