Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 150,661 pages of information and 235,200 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Marconi-Osram Valve Co

From Graces Guide
July 1945.

of Brook Green Works, Hammersmith, London.

1919 Marconi-Osram Valve Company formed as company owned jointly by GEC and Marconi's Wireless Telegraph Co; it took over GEC's valve factory.[1].

1920 Name of company changed to M-O Valve Co.[2].

1920 Jan. Physical and Optical Societies Exhibition. Exhibited wireless telegraphy.

1927 Recorded as being a subsidiary of GEC

1929 Gramophone Co acquired Marconiphone Co as well as Marconi's share in M-O Valve[3].

Continued to supply valves to Marconi.

1939 Acquired two disused cotton mills in Shaw, near Oldham; the Cape Mill and the adjacent Duke Mill which were converted into a shadow factory producing radio valves and cathode ray tubes for the war effort.[4]

1956 GEC purchased EMI's share in the M-O Valve company.

1958 Business had been focussed on thermionic devices for telecommunications, radar and military, and cathode ray tubes[5]

1969 Formation of GEC Electronic Tubes to bring together M-O Valve Co and English Electric Valve Co, a company which would have half of UK valve production, the largest specialised valve manufacturer outside USA[6].

See Also

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Sources of Information

  1. Competition Commission [1]
  2. Competition Commission [2]
  3. Competition Commission [3]
  4. Saga of Marconi-Osram Valve by Barry Vyse and George Jessop. ISBN:0-9539127-1-X
  5. The Times, Sep 05, 1958
  6. The Times, 22 April 1969