Truck body elevatorIn 1913, Thomas Wright of Jersey City, NJ patented a "body elevating mechanism." to load ice into refrigerator railway cars. It was a truck with an extension top that could be adjusted to any position. Thus ice could be loaded by one man, without help, even in the upper section of the railcar. His company manufactured these machines, and they were first used by the William Metz Ice Company of Pittsburgh, Pa. (May 1917).