BTH

1905. Electric Locomotive for the North Eastern Railway. Exhibit at the Shildon Locomotion Museum.

Plaque on the Winding Gear on the Victory Shaft at Geevor Mine.

Electric Winding Equipment at Geevor Mine.

Winding gear for the Victory Shaft at Geevor Mine.

June 1898.

1913.

1917.

1917.

July 1917.

1918.

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1918.

1919.

July 1919.

1920.

January 1920.

January 1920.

January 1920.

1921.

November 1922.

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1924.

May 1930.

June 1930.

May 1931.

October 1931.

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1933.

1933.

February 1935.

February 1936. Flame-proof metal-enclosed switchboard.

October 1936.

September 1937.

1938.

January 1939.

1939.

Film projector. Exhibit at Abbey Pumping Station, Leicester.

Film projector. Exhibit at Abbey Pumping Station, Leicester.

1940.

1941.

1943. Fabroil.

1943. Electric motors with control gear.

January 1944.

1946.

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1946.

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1946.

November 1947.

1951.

October 1951.

1953.

Exhibit at Bolton Steam Museum.

1960.

Exhibit at the Dover Transport Museum.

British Thomson-Houston Company (BTH)

of Crown House, Aldwych, London, WC2. Works at Rugby. Birmingham Office at 10 and 11 Snow Hill. Also of Alma Street, Coventry.

Offices and Depots: Belfast, Birmingham, Blackburn, Blackpool, Bournemouth, Bradford, Bristol, Cambridge, Cardiff, Cheltenham, Chester, Colchester, Dublin, Dundee, Edinburgh, Glasgow, Guildford, Hastings, Hull, Leeds, Leicester, Liverpool, Manchester, Middlesbrough, Newcastle-on-Tyne, Norwich, Nottingham, Oxford, Plymouth, Portsmouth, Sheffield, Southampton, Stoke-on-Trent, Swansea. (1937)

British Thomson-Houston (BTH) of Rugby was a British engineering and heavy industrial company, known primarily for its electrical systems and steam turbines. It had the use of the patents of GE of the U.S.A. and access to that company's experience, modifying the designs to suit the British and Colonial markets.

General

• 1886: The Laing, Wharton and Down Company was formed to sell products from the Thomson-Houston Company (previously American Electric Company). They soon won a contract for electrical lighting for the east end of London.

• 1889 Incorporated as a limited company: the Laing, Wharton and Down Construction Syndicate.

• 1892: General Electric (USA) was created by the merger of Thomson-Houston and Edison General Electric.

• 1894: Laing, Wharton and Down Construction Syndicate was renamed British Thomson-Houston after acquiring the British rights to Thomson-Houston patents. Started to set up factories in the British Midlands. Competed for electrical generation and distribution contracts with British Westinghouse, mirroring the battles in the U.S.A. between their parents, General Electric and Westinghouse.

• 1899 BTH chose Rugby, Warwickshire, as site for new factory, due to its good accessibility by rail and a local coal supply.

• 1900 BTH bought Glebe Farm (on the west side of Mill Road north of the railway) for £10,000, from Thomas Hunter and Co, on which to build the factory. The Power Act of 1900 was passed. It allowed BTH and British Westinghouse to win new contracts to supply electric power to large areas of the country.

• 1900 June. Tramways and Light Railways Exhibition at Islington. Showed two tramcars made by Hurst, Nelson and Co and equipped by them

• 1902 In March BTH opened the new factory in Mill Road, making electric motors and generators. The company also obtained a license to produce the Curtis steam turbine, which became one of their major products.

• 1903 Won contract from North-Eastern Railway for supply of electrical equipment for motor units, carriages and laying of third rail. British Westinghouse received a contract for switchboards, transformers and sub-stations .

• 1903 Sprague-Thomson-Houston system of multiple unit train control accepted for District Company's electrification in London .

• 1904 Contractors for the Central London and Great Northern and City lines electrification using direct current (dc) electricity .

• 1904 BTH started making turbines.

• 1905 BTH made its first turbo-alternator.

• 1907 BTH started a joint venture with Wolseley to make petrol-electric buses.

• 1908 BTH displayed a 3-phase alternator driven by a Curtis turbine, a motor drive system for textile machinery and a tungsten filament lamp at the Manchester Electrical Exhibition.

• 1909 Supplied generation plant in London to power a new electric trolley system.

• 1911: Acquired licences for all of General Electric's drawn-wire light bulbs, which they produced under the Mazda trademark.

• 1911 Electrical Exhibition. Mazda lamps from 6 to 600 watts and other equipment.

• 1914 Listed as electrical engineers and manufacturers of apparatus and supplies for electric traction, lighting and power. Specialities: "Curtis" turbines, horizontal and vertical type, "Mazda" metallic filament drawn wire lamp, railway and tramway equipments. Employees 5,600.

• WW1: BTH expanded into naval electrical equipment, supplying the Royal Navy with various lighting, radio and signalling gear. Using its experience in making filament lamps, became a manufacturer of radio valves

• 1916: Howard C. Levis became chairman of BTH.

• 1917 Advert. Electrical engineers and manufacturers with works at Rugby, Coventry and London.

• 1918 and after: BTH expanded dramatically, adding or expanding factories at Willesden, Birmingham, Chesterfield, and Lutterworth. (It later had factories in Coventry, and in Larne in Northern Ireland.)

• 1920 January. Catalogue of magnetos.

• 1920 February. Catalogue of DC motors up to 200 h.p.

• 1920 Board of Trade report into "Electric Lamp Combine" recognised the Electrical Lamp Manufacturers Association was set up principally in the interests of BTH, GEC and Siemens Brothers and Co.

• 1920 April. Portable Wireless Two-Valve Receiver. Details in The Engineer

• 1920 September. Exhibited at the Machine Tool and Engineering Exhibition at Olympia with motors for machine tool driving.

• 1924: BTH's Building 52, the research laboratory, was purpose built.

• 1925 February 19th. Founding shareholder in Austin Electric Co

• 1926: Gerard Swope, president of the U.S. General Electric, proposed that BTH, Westinghouse, GEC and the English Electric Co should amalgamate. Hugo Hirst of GEC was not interested in Swope’s scheme.

• 1927 See Aberconway for information on the company and its history.

• 1927 BTH was one of the UK's major electrical-machinery and plant manufacturers with 12,000 employees; others major manufacturers beings GEC, Metropolitan-Vickers (which incorporated British Westinghouse), English Electric Co, and C. A. Parsons and Co. Works at Rugby (turbo plant, heavy machinery, electric traction equipments and lighting and radio material), at Birmingham (electric motors), at Coventry (radio apparatus and fractional horse-power motors), and at Willesden (switch gear).

• 1928 International General Electric Company (USA) owned nearly all of the Ordinary shares of the company.

• 1928 BTH was acquired by Metropolitan-Vickers, a company of similar size and product lineup, which had been bought from Vickers by International General Electric Company (USA) before passing control to F. Dudley Docker. Combined they would be one of the few companies able to compete with the Marconi's Wireless Telegraph Co or the English Electric Co on an equal footing. The new group was called Associated Electrical Industries (AEI). Also included in the new group were Edison Swan Electric Co (Ediswan) and Ferguson Pailin of Openshaw, Manchester (which BTH had been in the process of buying). As part of the merger, all of the Ordinary shares in BTH held by GE of USA were acquired. The hopes for the future of the new group were handicapped by poor communication and intense rivalry between the two power equipment companies, as well as increasing over-capacity in the industry; the two companies maintained their own identities until 1960. Rivalry between them continued such that AEI was never able to exert effective control over its two competing subsidiaries. Howard C. Levis became chairman of AEI.

• c.1930 AEI started to build west of the footpath that runs north through the AEI site in Rugby to the Leicester Road.

• 1933 BTH developed and supplied equipment for reproducing sound in cinemas offering greater fidelity than previously available.

• 1937: Frank Whittle's Power Jets company built the world's first prototype jet engine at the BTH works in Rugby. BTH had a major role in developing it. Development was later moved to the Lutterworth works, which were falling into disuse at the time. BTH's directors seemed skeptical of the design and offered little help.

• 1937 Manufacturers of magnetos, starters and air compressors. "B.T.H." Electrical Equipment.

• 1937 British Industries Fair Advert for Lighting Products, including 'Mazda' Mercra; Projector Lamps; Mazda Gas-filled and Mazda Vacuum Lamps; Light Tubes for Architectural Lighting; B. T. H. Lighting Equipment for Street, Industrial and Floodlighting; Maxdalux Floodlight Projectors. etc., etc. (Stand No. Cb.607 and Cb.504)

• 1939 See Aircraft Industry Suppliers

• 1940 Fabroil silent pinions and a range of electrical equipment.

• WW2 BTH expanded north of the River Avon into the Boughton Road site to make magnetos for aircraft engines and other war products.

• 1940: BTH decided they were not really interested in making jet engines due to their commitment to electrical equipment. Rover was soon selected to make jet engines.

• 1943 Rover passed on jet engine making to Rolls-Royce.

• 1944 The Lutterworth Power Jets work was nationalized.

• 1945 Advert for electric motors with control gear for industrial use. Fabroil silent pinions.

• 1945 Post-WWII. Oliver Lyttelton took over AEI, and started a massive expansion.

• 1946 Formed Glass Bulbs Ltd jointly with GEC; supplied the blown glass envelopes used by M-O Valve and as well as other valve makers.

• 1947 The Hungarian scientist Dennis Gabor invented holography at the BTH site in Rugby.

• 1951 Advert for Mazda lamps and lighting equipment - and much more.

• 1953 AEI acquired Siemens Brothers.

• 1956 Ediswan trademark appeared on semiconductors.

• 1957 The massive new £8 million turbine works was opened at Larne as a result.

• 1957 or after: BTH won the contract to build the new Buenos Aires power station, valued at £35 million. Rivalries intensified with Metrovick. Lyttelton continued to try to reduce this friction, leading to several unsuccessful reorganizations and slipping profits.

• 1960 Jan 1: To try to cure this, AEI stopped using the names BTH and Metrovick. This led to a huge falling-off in sales because no-one had heard of AEI before, and in turn, a massive drop in AEI's stock price. Continued attempts to streamline what was two separate management structures continued to fail, and by the mid-60's the entire AEI empire was in financial trouble.

• 1960 Advert. Generators, motors, rheostat and electronic control gear, switchgear, transformers, rectifiers, helical gearing etc.

• 1962 Commissioning of Britain's first commercial nuclear power facility at Berkeley.

• 1963-1967 Construction and commissioning of the £25M radar dish at Chilbolton Observatory.

• 1967 AEI brands included Metropolitan-Vickers, BTH, Edison Swan and Ediswan, Siemens Brothers, Hotpoint, Birlec and W. T. Henley.

• 1967 GEC bought AEI outright. GEC thus became the UK's largest electrical group.

• 1969 Marconi Radar Systems Ltd. (MSRL) formed from GEC-AEI Electronics (Blackbird Road and New Parks, Leicester), Marconi's Radar Division (Chelmsford) and Elliott's Aerospace Control Division.

• 1980s GEC Rugby shrank. Many buildings were pulled down. The area west of the Black Path became a supermarket site. The Boughton Road site became several separate small firms.

• 1989 GEC in Rugby split into GEC Alsthom and Cegelec Projects.

• 1998 GEC Alsthom and Cegelec Projects were reunited as Alstom.

• 2007 The firm's clubhouse on Hillmorton Road was pulled down, and its surrounding sports field was used for house building along its south edge.

Domestic Appliances

See BTH: Domestic Appliances

Radio and Television

See BTH: Radio and Television

See Also

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Sources of Information

• [1] Wikipedia
• Stationary Steam Engines of Great Britain by George Watkins. Vol 10