Thermionic Products
of Haymarket, London, maker of the Soundmirror and Recorder dictation machine.
of Hythe, Southampton (1954)
1947 Patent by Alfred George de Quervain Colley and the company of Sutton, Surrey, "Improvements in apparatus for recording and reproducing sound"
1948 Patent by Alfred George de Quervain Colley and the company of Pratt Walk, Lambeth, " Improvements in and relating to recording apparatus"
1948 "The Recorder, a compact, valve-operated magnetic recording and transmitting outfit made Outfit by Thermionic Products Limited. Pratt Walk, London, S.E.11, is no larger than the average portable typewriter."[1]
1949 Patent by the company, of Haymarket, London, "Improvements in or relating to recording or reproducing apparatus", an invention by Edward Barnabas Angold.
1949 Patent by the company, of Haymarket, London," Improvements in or relating to electromagnetic transducing apparatus" an invention by Edward Barnabas Angold. Several more patents in later years.
1953 The final patent of the company was from the Hythe address: "Improvements in or relating to multi-channel magnetic recording and reproducing apparatus", an invention of Frederick Clark, Edgar Plews Appleby, Charles Reginald Claber and William Charles Newman.
1954 Thermionic Products Ltd. (And associated company. The Brush Crystal Co. of Great Britain) Head Office and Works: Hythe, Southampton. T.: Hythe 3265. London Showrooms: Morris House, Jermyn Street, S.W.l. Manufacturers of the Thermionic Multichannel airport recorder and all types of magnetic recording equipment, including the “ Soundmirror.” The Brush Crystal Co. are engaged in the production of all types of crystal for use in the telecommunications field.[2]
By 1962 was Thermionic Products (Electronics), owned by Radio and Television Trust which then became Controls and Communications Ltd
See Also
Sources of Information
- ↑ Civil & Military Gazette (Lahore) 23 September 1948
- ↑ 1954 The Aeroplane Directory of the Aviation and Allied Industries