Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 145,364 pages of information and 230,731 images on early companies, their products and the people who designed and built them.
Makers of electric motors 
1991-3 BTR Industries acquired Hawker Siddeley and other internationally-known names in electromechanical drives and controls including gear manufacturers Hansen Transmissions, Prager and Stephan Werke. Brook Crompton became part of Brook Hansen.
1999 Merger of BTR and Siebe; Brook Hansen was split into motors companies and gear companies. The gear companies were aligned with the Rexnord group and the electric motors companies became known as Invensys Brook Crompton.
Now part of the Lindeteves-Jacoberg Group; once more known as Brook Crompton.