Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,143 pages of information and 233,681 images on early companies, their products and the people who designed and built them.
of Nightingale Lane, London SW.
of Kings Cross Road, London.
1935 Private company formed as Radio Transmission Equipment Ltd.
1943 Presented microphone and amplifier to South London Hospital for Women.
1947 Name changed.
1961 Scientific equipment, instruments, welding supplies, filtration, equipment and high frequency generators. 195 employees. 
By 1962 was a subsidiary of Philips Electrical.
Made X-ray machine for testing of metals
1962 Joint venture of Research and Control Instruments with Redifon of the Rediffusion group, pooling the 2 companies' induction and dielectric heating businesses; to be called Intertherm; based in Brixton.
1966 Research and Control Instruments was voluntarily wound up