Cosby Donald Philipps Smallpeice (23 March 1896 – 1977) was an English engineer involved in design of precision and production lathes, and pneumatic tools and hoists. He created the company Martonair, and on its flotation in 1966 he founded The Smallpeice Trust to provide opportunities for engineering students. Much of the history of Cosby Smallpeice is covered in a publication by The Smallpeice Trust titled "A Smallpeice of History", which documents the history of the founder, the trust, and its ongoing training programmes.