What was Alexander miles's job?

Alexander Miles was an African American inventor and businessman best known for his work on improving the design of the elevator. He patented an automatic opening and closing mechanism for elevator doors in 1887, which significantly enhanced safety and efficiency. His invention addressed the hazards associated with elevators, particularly the dangers posed by doors that did not automatically close. Miles's contributions were crucial in advancing elevator technology during a time when urban buildings were becoming taller and more prevalent.