The use of elevators in everyday life keeps people from facing long climbs up several flights of stairs. However, before the creation of elevator doors that close automatically, riding a lift was both complicated and risky.
Before automatic doors, people had to manually shut both the shaft and elevator doors before riding. Forgetting to do so led to multiple accidents as people fell down elevator shafts. As the story goes, when the daughter of African American inventor Alexander Miles almost fatally fell down the shaft, he took it upon himself to develop a solution. In 1887 he took out a patent for a mechanism that automatically opens and closes elevator shaft doors and his designs are largely reflected in elevators used today. (History Channel)
