Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,370 pages of information and 230,032 images on early companies, their products and the people who designed and built them.
of 51-53 Victoria Street, Westminster, London, SW1. Telephone: Victoria 7864-5-6. Cables: "Thermega, London". Works: Leatherhead. (1929 and 1947)
1929 British Industries Fair Advert for 'Fool-Proof' Electric Pads and Electric Blankets. Manufacturers of Electric Blankets and Heating Pads, fitted with the "Birka" temperature regulator, for general use and medical requirements. Supplied to Royal Air Force and all leading hospitals. (Furniture Section - Stand No. T.31) 
1944 Patent - Improvements in or relating to electric snap action switches. 
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Electrically Heated Blankets, Pads and other appliances for Medical, Domestic and Special Purposes. 
1960 Patent - Improvements in or relating to electrically heated textile articles.