C. A. Parsons and Company
A British engineering company founded by Charles Algernon Parsons to manufacture steam turbines and later associated with large-scale power-generation technology.
Last updated August 31, 2026
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Overview
C. A. Parsons and Company was a British engineering firm founded in 1889 by Charles Algernon Parsons, the inventor of the steam turbine. Established in Newcastle upon Tyne, the company became one of the most important industrial employers on Tyneside and developed a long association with electricity generation, heavy engineering, turbine manufacture and technical research. The company was created to commercialize Parsons's steam-turbine invention. At the beginning of the twentieth century, its Heaton factory in Newcastle was producing as many as 50 turbines per year. The technology had major applications in electric power generation and marine propulsion, helping establish the company as a significant supplier to the expanding electricity industry. Parsons also patented and manufactured searchlight mirrors between 1894 and 1923, demonstrating that its activities extended beyond turbines. Family involvement remained important during the company's early decades. Charles Algernon Parsons's son, Algernon George Parsons, known as Tommy, became a director. During the First World War, when Tommy Parsons was called up for military service, his sister Rachel Mary Parsons replaced him as a director. Rachel was among the first women to study engineering at the University of Cambridge. The company's Shields Road works employed many women during the war, although Rachel did not return to her Heaton directorship after her brother died during the conflict. The company expanded substantially after the Second World War. Between 1945 and 1960, it grew to roughly three times its earlier size, while its facilities at Heaton, Walkergate and Longbenton were reconstructed and enlarged. By the 1960s, the company's 100-acre Heaton site employed more than 7,000 people. Parsons turbines were used in numerous British nuclear power stations during the 1950s, 1960s and 1970s, including Bradwell, Calder Hall, Dungeness, Heysham 2 and Oldbury in England, as well as Chapelcross and Hunterston in Scotland. Research became another important part of the business. A Nuclear Research Centre was established at Heaton in April 1959 to support the development of nuclear power stations. Its work soon broadened into areas including masers, magnetoplasmadynamics, superconductivity and solid-state physics. After the Cuban Missile Crisis, the facility was reorganized in December 1962 as International Research and Development Company Ltd., a contract research organization serving industrial and government customers in Britain and overseas. Parsons also expanded through industrial acquisitions. In the 1960s it took over turbine and generator factories at Erith and Witton that had belonged to the General Electric Company. In 1968, it merged with A. Reyrolle & Company to create Reyrolle Parsons. In 1977, Reyrolle Parsons combined with Clarke Chapman under Northern Engineering Industries. Northern Engineering Industries was acquired by Rolls-Royce in 1989, and Rolls-Royce subsequently sold the business to Siemens in 1997. The business is now part of Siemens Energy. The historic Heaton site was renamed the CA Parsons Works in recognition of the founder. During the 2000s, activity at Heaton was significantly reduced, with the site focusing mainly on servicing while manufacturing was concentrated at facilities in Mülheim and Budapest. Parsons turbines remain preserved in museums including the Discovery Museum in Newcastle, the Science Museum in London and the Electric Power and Historical Museum in Yokohama, Japan.
History
C. A. Parsons and Company was established in 1889 in Newcastle upon Tyne by Charles Algernon Parsons to manufacture and commercialize the steam turbine. Parsons's invention transformed the possibilities of high-speed mechanical power generation and became central to the development of modern electricity-generating equipment. The company's early manufacturing base was the Heaton Works, where production had reached as many as 50 turbines annually by the beginning of the twentieth century. The firm developed into a major Tyneside engineering employer. Its work extended beyond steam turbines: between 1894 and 1923, it patented and produced searchlight mirrors. The company also retained a strong family connection. Charles's son, Algernon George Parsons, became a director, and his sister Rachel Mary Parsons took his place when he entered military service during the First World War. Rachel had been among the first women to study engineering at Cambridge. During the war, the Parsons Works on Shields Road employed substantial numbers of women in factory roles. Rachel did not return to the Heaton directorship after her brother's death during the war. Sir Claude Gibb joined the company during the 1920s and later became chairman and managing director. During the Second World War, the company contributed engineering capacity to military requirements. Post-war expansion was particularly strong. From 1945 to 1960, the business tripled in size, and its Heaton, Walkergate and Longbenton facilities were rebuilt or expanded. In 1951, the original 1889 workshop was demolished and replaced by a six-storey office building. The company's peak industrial period came in the 1960s, when more than 7,000 people worked across its 100-acre Heaton site. Power generation was the company's principal long-term industrial legacy. Parsons turbines were installed in British nuclear power stations during the 1950s, 1960s and 1970s, including Calder Hall, Chapelcross, Bradwell, Dungeness, Hunterston, Oldbury and Heysham 2. In April 1959, Parsons created a Nuclear Research Centre at Heaton to support the development of nuclear power stations. The centre expanded into masers, magnetoplasmadynamics, superconductivity and solid-state physics. In December 1962, following the Cuban Missile Crisis, it was reorganized as International Research and Development Company Ltd., a contract research organization led by Lord Fleck as chairman and Monty Finniston as managing director. The company's corporate structure changed repeatedly during the consolidation of Britain's engineering industry. During the 1960s, it acquired the General Electric Company's turbine and generator factories at Erith and Witton. In 1968, C. A. Parsons and Company merged with A. Reyrolle & Company to create Reyrolle Parsons. In 1977, after James Woodeson became chairman in 1974, Reyrolle Parsons merged with Clarke Chapman to form Northern Engineering Industries. Rolls-Royce acquired Northern Engineering Industries in 1989. Rolls-Royce later sold the business to Siemens in 1997, and the enterprise is now part of Siemens Energy. The Heaton facility was subsequently renamed the CA Parsons Works. By the 2000s, operations there had been substantially reduced and concentrated mainly on servicing, while manufacturing activity was focused at facilities in Mülheim and Budapest. The company's technological heritage is represented by preserved Parsons turbines in collections including Newcastle's Discovery Museum, the Science Museum in London and the Electric Power and Historical Museum in Yokohama, Japan.
- 2000
Heaton operations refocused
[1]During the 2000s, Heaton activity was significantly reduced and focused mainly on servicing, with manufacturing concentrated at Mülheim and Budapest.
- 1997
Business transferred to Siemens
[1]Siemens acquired the business from Rolls-Royce; the operation is now associated with Siemens Energy.
- 1989
Acquired by Rolls-Royce
[1]Rolls-Royce acquired Northern Engineering Industries, bringing the Parsons business into its group.
- 1977
Northern Engineering Industries formed
[1]Reyrolle Parsons merged with Clarke Chapman to create Northern Engineering Industries.
- 1968
Merged with A. Reyrolle & Company
[1]The company merged with A. Reyrolle & Company to form Reyrolle Parsons.
- 1962
Research organization reorganized
[1]The Heaton research operation was transformed into International Research and Development Company Ltd., a contract research organization.
- 1959
Nuclear Research Centre established
[1]Parsons established a nuclear research centre at Heaton to support Britain's emerging nuclear power programme.
- 1951
Heaton workshop replaced
[1]The original 1889 workshop at Heaton was demolished and replaced by a six-storey office building.
- 1894
Searchlight mirror development begins
[1]The company began patenting and manufacturing novel searchlight mirrors, an activity that continued into the early twentieth century.
- 1889
Company founded
[1]Charles Algernon Parsons founded the company in Newcastle upon Tyne to manufacture steam turbines.
Products and positioning
Historically positioned as a leading British designer and manufacturer of steam turbines and large-scale power-generation equipment, with additional capabilities in heavy engineering, industrial research and lifecycle servicing.
Power-generation equipment · 1889
Parsons steam turbines
Steam turbines were the company's foundational product and the technology around which its industrial identity was built. Developed from Charles Algernon Parsons's invention, they converted steam energy into rotary mechanical power for electricity generation and other heavy-industrial applications. Parsons turbines became associated with large power stations and were installed in several British nuclear facilities during the post-war decades.
Power-generation equipment
Turbo-generators
The company manufactured turbine and generator equipment for electric power applications. Its capabilities included large industrial machinery supplied to power stations, including nuclear facilities. The business later operated alongside related turbine and generator manufacturing activities acquired from the General Electric Company at Erith and Witton.
Optical and military equipment · 1894
Searchlight mirrors
Between 1894 and 1923, Parsons patented and manufactured novel searchlight mirrors. This line reflected the company's broader engineering capability beyond turbines and connected its production expertise with industrial and defense-related equipment requirements.
Engineering services · 1959
Engineering research and servicing
The Heaton organization developed technical research capabilities in nuclear power, masers, magnetoplasmadynamics, superconductivity and solid-state physics. In the 2000s, the remaining Heaton operation was primarily focused on servicing rather than large-scale manufacturing, while production was concentrated elsewhere in the wider business.
Brand decisions
1997
Transfer from Rolls-Royce to SiemensM&ABackground
The Parsons business formed part of the industrial assets later transferred out of Rolls-Royce.
Action taken
Siemens acquired the business from Rolls-Royce.
Aftermath
The business became part of the Siemens industrial portfolio and is now associated with Siemens Energy.
1989
Acquisition by Rolls-RoyceM&ABackground
Northern Engineering Industries had become the corporate vehicle containing the Parsons business after the 1968 and 1977 combinations.
Action taken
Rolls-Royce acquired Northern Engineering Industries.
Aftermath
The Parsons business operated within Rolls-Royce until its transfer to Siemens in 1997.
1977
Formation of Northern Engineering IndustriesM&ABackground
Reyrolle Parsons and Clarke Chapman were combined as part of continued consolidation in British engineering.
Action taken
Reyrolle Parsons merged with Clarke Chapman to form Northern Engineering Industries.
Aftermath
Northern Engineering Industries was subsequently acquired by Rolls-Royce in 1989.
1968
Merger with A. Reyrolle & CompanyM&ABackground
The British heavy-engineering sector was consolidating around larger industrial groups and complementary power-equipment capabilities.
Action taken
C. A. Parsons and Company merged with A. Reyrolle & Company to form Reyrolle Parsons.
Aftermath
The merger created a combined engineering business that later became part of Northern Engineering Industries.
1962
Creation of a contract research organizationStrategyBackground
Parsons's nuclear research operation had expanded beyond its original role supporting nuclear power development into several advanced scientific and engineering fields.
Action taken
In December 1962, the research centre was reorganized as International Research and Development Company Ltd., serving industrial and government clients in Britain and overseas.
Aftermath
The reorganization gave the research activity a broader contract-research remit.
Sources1 sources
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