It is said it was the invention of the automatic elevator braking system by Elisha Otis that made the modern skyscraper a practical possibility and it is certainly hard to see how any building of more than six floors could…
It is said it was the invention of the automatic elevator braking system by Elisha Otis that made the modern skyscraper a practical possibility and it is certainly hard to see how any building of more than six floors could…