Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,459 pages of information and 233,880 images on early companies, their products and the people who designed and built them.
of Moorgate, London (1955)
1955 Nucleonics instruments
1956 Existing shareholders included: Vickers, Guest, Keen and Nettlefold, Prudential Assurance, Morgan Grenfell and Co, Distillers; they were joined by AEI in a scheme raising new capital for the business. Products included instruments for laboratory work on atomic energy, industrial instruments for control work where radioactive isotopes were involved; work would be done on control instruments for nuclear reactors 
1960 Elliott Automation acquired Isotope Developments (Beenham), a subsidiary of Isotope Developments concerned with nucleonic instruments, in order to avoid duplication by both companies in the nucleonic instruments field. Isotope Developments Ltd changed its name to Nucleonic Investments Ltd, and continued to own R. A. Stephen and Co, a maker of radiation measuring instruments 
1963 Elliott Automation acquired Baldwin Instrument Co, maker of nucleonic instruments for process control and fluid power equipment; Baldwin would complement existing Elliott businesses - Elliott Nucleonics and Isotope Developments
1967 Baldwins and Isotope Developments were combined in one location at Beenham, Berks