Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,961 pages of information and 228,875 images on early companies, their products and the people who designed and built them.
Crypton Equipment of Bridgwater, Somerset.
1936 Produced one of the world's first engine testers.
1950s Pioneered the concept of 'area testing' and the use of oscilloscopes in testing.
1961 Manufacturers of automobile engine, battery and electrical testing and servicing equipment. 300 employees. 
1960s Research into computer controlled equipment
1963 Motor Show exhibitor. Engine performance equipment.