Dewrance & Co. Ltd was a manufacturer of engine and boiler accessories, such as pumps and gauges.
History
It was established in London in 1835 as a partnership by Joseph Woods, with John Dewrance. It was involved in the building of the locomotive Lion in 1838 for the Liverpool and Manchester Railway.[1][failed verification] In 1844 after Wood's death the firm became a company specialising in manufacturing engine and boiler accessories. It produced a brass pressure gauge for Lloyd's Register of shipping to pressure-test ships' boilers before insuring them.[2] Such gauges have become collectable.[3] A pair are on display at the Internal Fire – Museum of Power.[4]
Dewrance died in 1861 and left the business to his son.[5] The firm's introduction of the groove-packed plug cock in 1875 was a major innovation because it made steam safety valves easier to operate.[6] Sir John Dewrance,[7] who was married to the granddaughter of Richard Trevithick took over the business in 1879.[8] In 1937 after Dewrance's death it became a wholly owned subsidiary of Babcock & Wilcox Ltd.[8]
John Dewrance conducted experiments on the distribution of heat in steam boilers.[10] There are claims he was responsible for the construction of George Stephenson’s locomotive the Rocket and for supporting it at the Rainhill trials.[9][a] He was appointed Locomotive Superintendent of the Liverpool and Manchester Railway from 1840 to 1844 during which time his 2-2-2 designs at the Edge Hil workshops were noted for their neatness.[11]
In October 1845 he entered the employ of the Great Southern and Western Railway of Ireland and was selected from three candidates as Locomotive Superintendent in March 1847 at a salary of £300 pera anuum with housing assistance.[b] He was immediately seconded to locomotive manufacturer William Fairbairn & Sons, Millwall, London to gain experience. Following a review in October 1947 his services were dispensed with due to claim his remuneration was inappropriately high for his abilities.[13] He was then appointed Locomotive Superintendent by the rival Midland Great Western Railway (MGWR) of Ireland, again for £300 per annum with a house in Cabra Road, Dublin.[14] Following the decision of the MGWR director's to let the operation of the line Dewrance was released with three months salary.[14]
Dewrance died in 1861 and left the business to his son.[15][5]
The firm's archives are held in the British National Archives.[28]
Notes
^The single current source with the Rocket claim may not be independent,[9] and some may claim this was unlikely. If Dewrance could be linked with George Stephenson's firm then association with the Rocket might be entirely possible and his positioned at the L&MR to aid servicing of Stephenson's locomotives would then be very reasonable but there is no current sourcing to support this.
^The 1974 work Murray and MacNeill claim Dewrance was Locomotive Superintendent or equivalent since 1844.[12]
^Wigham, Eric (1973). "Appendix L". The Power to Manage: A History of the Engineering Employers' Federation. Palgrave Macmillan. ISBN978-1-349-01264-0.
^"John Dewrance". Graces Guide to British Industrial History. Archived from the original on 23 April 2019. Retrieved 23 April 2019.
^Teague, S John (1980). The City University, a history(PDF). City University of London. p. 211. Archived(PDF) from the original on 2 October 2015. Retrieved 23 April 2017.
Clements, Jeremy; McMahon, Michael; O'Rourke, Alan (2020). Locomotives of the Great Southern and Western Railway. County Louth: Collon Publishing. ISBN9781527270282.
Dewrance Sir J 1912, letter to Science Museum, Nominal file 565