In 1852 Elisha Otis invented the safety elevator, which automatically comes to a halt if the hoisting rope breaks. After a demonstration at the 1853 New York World's Fair, the elevator industry established credibility. The Otis Elevator Company was founded in Yonkers, New York, in 1853 by Elisha Otis. When Elisha died in 1861, his sons Charles and Norton formed a partnership and continued the business. During the American Civil War, their elevators were in high demand due to the shipment of war materials. Businesses throughout the United States purchased them. In 1864, with the partnership of J.M. Alvord, the company became known as Otis Brothers &amp; Co. In 1867, Otis opened a factory in Yonkers, New York, the city where the company was founded.