Mezue nkebi ahịrịokwu a: N'afọ 1852, Elisha Otis mepụtara ígwè e ji adọkpụ ụgbọala, bụ́ nke na-akwụsị ịrụ ọrụ ma ọ bụrụ na eriri e ji adọkpụ ya agbajie. Mgbe ihe ngosi na
Na 1853 New York World's Fair, ụlọ ọrụ elevator guzobere ntụkwasị obi. Otis Elevator Company hiwere na Yonkers, New York, na 1853 site n'aka Elisha Otis. Mgbe Elisha nwụrụ n'afọ 1861, ụmụ ya ndị nwoke bụ́ Charles na Norton jikọrọ aka wee gaa n'ihu n'azụmahịa ahụ. N'oge Agha Obodo America, a na-achọkarị igwe mbuli ha n'ihi mbupu ihe agha. Ụlọ ọrụ dị iche iche n'Amerịka na-azụ ha. N'afọ 1864, na mmekọrịta nke J.M. Alvord, ụlọ ọrụ ahụ ghọrọ nke a maara dị ka Otis Brothers & Co. N'afọ 1867, Otis mepere ụlọ ọrụ na Yonkers, New York, obodo ebe ụlọ ọrụ ahụ hiwere.