American firearms manufacturer who popularized the revolver.

When Colt was a young seaman, he carved a wooden model of a revolver, and years later he perfected a working version that was patented in England and France in 1835 and in the United States the following year. Featuring a cartridge cylinder that was rotated by cocking the hammer, Colt's single-barreled pistols and rifles were slow to gain acceptance, and a company that formed to manufacture them in Paterson, N.J., failed in 1842. The following year he devised an electrically discharged naval mine, the first device using a remotely controlled explosive, and he also conducted a telegraph business that utilized the first underwater cable.

Word from military units that Colt's multi-shot weapons had been effective against Indians in Florida and Texas prompted a government order for 1,000 pistols during the Mexican War, and Colt resumed firearms manufacture in 1847. In 1855 he built the world's largest private armoury on the site of the present Colt Industries plant in Hartford. Assisted by Eli Whitney, Jr., he developed beyond any industrialist before him the manufacture of interchangeable parts and the production line, and he also applied progressive ideas concerning employee welfare. His invention made him a wealthy man. His firm produced the pistols most widely used during the American Civil War, and its six-shot, single-action .45-calibre Peacemaker model, introduced in 1873, became the most famous sidearm of the West.