 Edison & Swan United Electric Light Company Limited, catalogue and price list 1893, front cover | |
| Company type | Limited company |
|---|---|
| Industry | Electric industry |
| Predecessor | Edison & Swan United Electric Light Company |
| Founded | 1883 |
| Founder | Thomas Edison Joseph Swan |
| Defunct | 1964 |
| Fate | Merged to British Lighting Industries Ltd. |
| Successor | Siemens Ediswan |
| Headquarters |
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Key people | James Staats Forbes (chairman) |
| Products | Lamps,radio valves,cathode ray tubes |
| Parent | Associated Electrical Industries (1928–1964) |
TheEdison and Swan Electric Light Company Limited was a manufacturer ofincandescent lamp bulbs and other electrical goods. It was formed in 1883 with the nameEdison & Swan United Electric Light Company with the merger of the Swan United Electric Company and the Edison Electric Light Company.[1][2]
Thomas Edison established the Edison Electric Light Company in 1878.Joseph Swan established the Swan United Electric Light Company in 1881. Swan sued Edison in the UK, claiming patent infringement; this was upheld by the British courts. In 1882, Edison sued Swan, claiming infringement of his 1879 U.S. patent; however, the Edison Company believed their case would be jeopardized if Swan could demonstrate prior research and publication. Subsequently, in order to avoid uncertain and expensive litigation, the two companies negotiated a merger.[3] The glass bulbs sold in Britain were of Swan's design, while the filaments were of Edison's.[4][failed verification] From 1887 or earlier SirAmbrose Fleming was an adviser to the company, and conducted research at Ponders End.[5]
The company had offices at 155Charing Cross Road, London, and factories inBrimsdown,Ponders End andSunderland. In 1928, the company was acquired byAssociated Electrical Industries. In 1956, a new cathode ray tube plant was opened in Sunderland. The company was renamed Siemens Ediswan following the takeover ofSiemens Brothers by AEI in 1957. In 1964, AEI merged its lamp and radio valve manufacturing interests with those ofThorn Electrical Industries to form British Lighting Industries Ltd.[1]
Edison Swan (or later Siemens Edison Swan) produced a wide range ofvacuum tubes andcathode ray tubes under the names "Ediswan" or "Mazda"[6] and the 1964 Mazda Valve Data Book claimed: "Professor Sir. Ambrose Fleming... was Technical Consultant to the Edison Swan Company at the time. It was this close co-operation between University and Factory which resulted in the first radio valve in the world."[7]Ediswan still survives as a manufacturer of valves (located in Bromsgrove England).
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