David Roberts was the Chief Engineer and managing director of Richard Hornsby & Sons in the early 1900s. His invention, the caterpillar track, was demonstrated to the army in 1909. The company bearing the name of Richard Hornsby (1790-1864), the agricultural engineer, was founded when Richard opened a blacksmithy in Grantham, Lincolnshire in 1815. ... U.S. M60 Patton tank. ... The British Army is the land armed forces branch of the British Armed Forces. ...