From Graces Guide
of 28 Little Russell Street, London, WC1. Telephone: Holborn 2986/7. Telegraphic Address: "Radivisor, Westcent, London"
1928 Company established
1929 Patent - Improved pyrometer.
1937 British Industries Fair Advert for Light-Actuated Apparatus. Radiovisor Lighting Control Unit. Radiovisor smoke Inducator and Alarm. Radiovisor Counting Unit. Radiovisor Temperature Control Unit. Radiovisor Fuel, Oil Burner Control, Raycraft Apparatus. (Electricity: Industrial and Domestic Section - Stand No. Cb.419)
1965 Patent - Improvements in and relating to apparatus responsive to and for the production of an electrical signal indicative of the magnitude of a measured variable.