The inter-war years saw rapid growth in engineering and machine-tool manufacturing firms such as James Archdale and H. W. Ward, castings for the motor industry from Worcester Windshields and Casements, valve design and manufacture from Alley & MacLellan, Sentinel Valve Works, mining machinery from Mining Engineering Company (MECO) – later part of Joy Mining Machinery – and open-top cans from Williamsons, although G. H. Williamson and Sons had become part of the Metal Box Co in 1930. Later the company became Carnaud Metal Box PLC.