Brown was born in Huddersfield, Yorkshire. After attending King James's Grammar School, Almondbury and Rossall School, he started work as an apprentice in the family business, David Brown Gear Company Ltd. He became managing director in 1931, on his uncle Percy's death. In 1934 the company built a new factory on a site at Meltham, on the south side of Huddersfield. Brown, who also owned a farm, started building tractors with Harry Ferguson there in 1936, but they disagreed over design details, which led David Brown to design his own version. During the Second World War his new heavier tractor, called the David Brown VAK1, was produced, with over 7,700 units eventually sold, making Brown into a wealthy man. Meanwhile Harry Ferguson had gone to America and did a deal with Henry Ford to incor