Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,955 pages of information and 210,199 images on early companies, their products and the people who designed and built them.
of Hayes, Middlesex. Telephone: Southall 2468. Cables: "Emifactory, Hayes, Middlesex"
1931 The Electric and Musical Industries Ltd formed in March 1931 as a public company from a merger of the UK Columbia Graphophone Co and the Gramophone Co and others. From its beginning, the company was involved in both the manufacture of recording and playback equipment and the provision of music to play on its machines.
The company's gramophone manufacturing led to forty years of success with larger-scale electronics. During and after the World War II, the EMI Laboratories in Hayes, Hillingdon developed radar equipment and guided missiles.
1936 The Marconi-EMI system was adopted by the BBC for its public high definition television service - the first in the world.
WWII: started production of special types of thermionic valves.
1947 British Industries Fair Advert for Radio Frequency Heating for industrial purposes. Illustrating Model R.F.H.1. Manufacturers of Radio - Frequency Industrial heating Equipment for the Moulding Industry and a wide range of industrial processes, including treatment of wood, sterilisation of food, case-hardening of steel, brazing and soldering. (Plastics Section - Earls Court, 1st Floor, Stand No.821) 
1955 Formed EMI Electronics Ltd to lead the expansion of business in commercial and industrial electronics; the company was previously known as Emitron Television Ltd; it would absorb EMI Engineering Developments, EMI Factories, and EMI Research Laboratories
1955-7 The EMI Electronic Business Machine was developed at Hayes; this was a valve-based computer which was ordered by BMC for payroll work; valves were then recognised as being too unreliable and future computer development was based on transistors.
1958 the EMIDEC 1100, Britain's first transistorized computer, was developed at Hayes under the leadership of Godfrey Hounsfield.
1961 Columbia Gramophone Co - Manufacturers of gramophone records, radio sets, radio-grams and television receivers. 
1961 Holding company for nine subsidiaries. Group employees are 26,000. 
By 1967 EMI had sold just 3 of its Emidec 2400 computers
1967 The nucleonics activities were acquired by Nuclear Enterprises (G.B.)
1968 Queen's Award to Industry for Technological Innovation. 
1968 Supplied reactor operating recorder for the Winfrith power station. as EMI (Electronic). 
1968 GEC and EMI merged their domestic appliance businesses, British Domestic Appliances and GEC (Domestic Equipment) producing the largest refrigerator maker in the UK and major share in washing machines, cookers and small electrical appliances, which was then called British Domestic Appliances.
Early 1970s, the EMI scientist developed the first CAT scanner, a device which revolutionized medical imaging. Hounsfield later won the Nobel Prize for his accomplishment. After brief but brilliant success in the imaging field, EMI's manufacturing activities declined and disappeared.
1976 EMI acquired a further 61 percent of Nuclear Enterprises, taking its holding up to 90 percent, particularly because of interest in Nuclear Enterprises' ultrasonic scanning equipment, which would complement EMI's whole body X-ray scanner