Edward Allis became well known in the 19th century for producing large steam engines, and in 1901 he joined with a number of other companies to form Allis-Chalmers. These other companies added a range of agricultural machinery to the product line. The first Allis-Chalmers tractor, the three-wheeled 10-18 model, was introduced in 1914, and was soon followed by the smaller 6-12 model. As tractor design moved in the direction of four-wheeled machines, Allis-Chalmers responded with a range of models from the 12-20 to the 20-35. In 1929, Allis-Chalmers agreed to build tractors for the United Tractor & Equipment Corp. - this "United" tractor went on to become the highly successful Model U, and in this latter form it was one of the first tractors to use pneumatic tyres. Our interest in the company ends at this point, although the company continued to go from strength to strength, broadening its range of products to include such diverse things as mineral processing equipment and even nuclear reactors.

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