THE HISTORY OF POLE VAULTING

THE HISTORY OF POLE VAULTING Elisha Graves Otis didnt control the elevator, he invented something perhaps more important---the elevator brake-which made skyscrapers a practical reality. Born on a farm or so Halifax, Vermont, the youngest of six children, Otis made several attempts at establishing businesses in his early years. However, chronically poor health lead to running(prenominal) financial woes. Finally, in 1845, he tried to change his sight with a move to Albany, New York. There he worked as a master mechanic in the bedstead plodding of O. Tingley & Company.

He remained abo ut three years and during that time invented and ramble into use a railway safety brake, which could be controlled by the engineer, and ingenious devices to run rails for four-poster beds and to improve the operation of turbine wheels. From strange times through the Middle Ages, and into the 13th century, man or animal power was the driving force behind hoisting devices. By 1850 steam and hydraulic eleva...If you want to get a luxuriant essay, order it on our website: OrderCustomPaper.com

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