The Warner & Swasey Company was an American manufacturer of machine tools, instruments, and special machinery. It operated as an independent business firm, based in Cleveland, from its founding in 1880 until its acquisition in 1980. It was founded as a partnership in 1880 by Worcester Reed Warner (1846–1929) and Ambrose Swasey (1846–1937). The company was best known for two general types of products: astronomical telescopes and turret lathes. It also did a large amount of instrument work, such as equipment for astronomical observatories and military instruments (rangefinders, optical gunsights, etc.) The themes that united these various lines of business were the crafts of toolmaking and instrument-making, which have often overlapped technologically. In the decades after World War II, it also entered the heavy equipment industry with its acquisition of the Gradall brand. History In 1866, Swasey and Warner met as fellow apprentices at the Exeter Machine Works in Exeter, New Hampshire. Within a few years they went together to Pratt & Whitney in Hartford, Connecticut, which was one of the leading machine tool builders of the era. There they both rose through the ranks, with Warner rising to be in charge of an assembly floor and Swasey rising to be foreman of the gear-cutting department. There Swasey invented the epicycloidal milling machine for cutting true theoretical curves for the milling cutters used for cutting gears. In 1880, Swasey and Warner resigned from Pratt & Whitney in order to start a machine-tool-building business together. They investigated Chicago as a place to build their works, but they perceived the Chicago of 1880 as too far west and lacking a sufficient labor pool of skilled machinists. So they went to Cleveland, Ohio, where their company would stay for the next century. They worked together for 20 years without a formal corporate agreement, during which time their partnership's principal products were various models of lathes and milling machines. From the beginning, the partners built both machine tools and telescopes, which reflected their interests in toolmaking, instrument-making, and astronomy. After nearly 20 years of successful growth, the partners realized that their business was growing enough that it should be given a formal corporate structure, so in 1900 they reorganized it under the official name of The Warner & Swasey Company. During the early- to mid-20th century, the company was well known in American industry. Its products, both turret lathes and instruments, played very prominent