Originally C.H. Pugh's Atlas Chain Company, this firm started making mowers in 1921 and were soon the market leaders for the suburban market with their "Standard" mower. The "Standard" was soon followed by a series of lightweight mowers which sold in large numbers both before and after World War 2. ATCO became part of the Qualcast Group in 1962 and part of Birmid-Qualcast in 1967. In 1969 they merged with Suffolk Iron Foundries to become Suffolk Lawn Mowers whereupon ATCO production moved to Stowmarket. Birmid-Qualcast were acquired by Blue Circle Industries in 1988, and in 1992 there was a further name change when the name Atco-Qualcast was adopted.