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Ransomes, Sims and Jefferies, engineers of Orwell Works, Ipswich were a major British agricultural machinery maker.
Genealogy of the Company
1884 Ransomes, Sims and Jefferies was registered on 12 May, to acquire the business of Ransomes, Head and Jefferies agricultural engineers. . The management of the company would be continued by the partners of the old company: Robert Charles Ransome (Chairman), James Edward Ransome, John Jefferies, who became shareholders in the new company together with William Dillwyn Sims and members of the families .
1888 Issued catalogue on portable, traction, semi-portable, fixed, horizontal and vertical engines and boilers, portable pumping engines, steam-powered presses, centrifugal pumps, winding engines and gear, locomotive, Cornish, Lancashire and vertical boilers, mills, circular saw benches and log frames. 
1889 Semi-portable engine at the RASE show at Windsor. 
1894 June. Royal Agricultural Society's Show. Chilled digging plough, balance plough and three-furrow plough. 
1894 High-Speed Vertical Engines for Electric Lighting. Illustration and article. 
1900 June. Royal Agricultural Show at York. Showed traction and portable engines, thrashing machines, horse rakes, ploughing cultivators and lawn mowers. 
1903 Ransomes, Sims and Jefferies developed a prototype tractor with a 20 HP engine and a three-ratio gearbox.
1905 The company employed 2,000 persons.
1911 Smithfield Club Show. Exhibited 4 hp compound light tractor and two traction engines plus other items. 
1913-1917 For a list of the models and prices of Electric Vehicles see the 1917 Red Book. Maker of the 'Orwell' electric vehicle.
1913-1917 For a list of the models and prices of Petrol Motor Commercial Vehicles see the 1917 Red Book
1914 Specialities: Portable and Traction Engines, Stationary Engines of all kinds, High-speed Vertical Engines for Electric Work, Boilers of all kinds, Thrashing Machines, Corn Mills, Tea Machinery etc. Employees 2500. 
WWI Makers of aeroplanes.
1919 An association was made with Ruston and Hornsby and this continued until 1940.
1920 The company showed the new motor plough called The Boon at the Darlington Agricultural Show. It was a petrol-paraffin engine of 20 hp at 800 rpm. 
1936 The MG2 tractor was introduced. It was a miniature crawler machine which was aimed at market gardeners and was produced for about thirty years.
1937 Listed as Engineers. 
1939 See Aircraft Industry Suppliers
WWII Manufactured parts for the De Havilland Mosquito
1956 Sold the steam engine part of the business to Robey and Co.
1961 Engineers, manufacturing agricultural implements, harvesting machinery, lawn mowers, horticultural tractors, electric fork lift and platform trucks. 3,200 employees. 
1974 At the International Mechanical Handling exhibition held at Earls Court, Ransomes new battery powered industrial tractor, T12A.
1989 The whole of the agricultural implement business was sold to Electrolux and merged with their subsidiary Overum. This left Ransomes solely as a manufacturer of lawn mowers, with the Westwood and Mountfield mower brands. The company accepted a take over offer from Textron Inc, USA their independent existence ended early in 1998.
The history of company is the subject of an exhibition at the Museum of East Anglian Life in Stowmarket, Suffolk.