John Dewrance: father & son

Dewrance, John
Born in about 1803 (Grace's Guide). Died in 1861: father of Sir John Dewrance (below) (Ahrons British steam railway locomotive ). On the Liverpool & Manchester Railway John Dewrance was responsibe for erecting the Rocket (IMechE website) and new locomotives of the Bird class: 2-2-2 with 12in x 18in cylinders with a freight version (2-4-0) with 13in x 20in cylinders: No. 69 Swallow (2-2-2) entered service on 8 September 1841. He experimented with coal buring on Condor.(Sekon). See R.H.G. Thomas.. When he left the Liverpool & Manchester he moved to Ireland to the GS&W, then in 1846 to the MGWR as locomotive superintendent being appointed at a salary of £300 per annum plus a company house on Cabra Road free of rent.
Patent (via Woodcroft)
GB 10,594/1845. Steam-boilers; construction, composition, and manufacture of bearings, steps, and other rubbing surfaces of steam-engines and other machinery; lubricating the same. 7 April 1845.

Dewrance, Sir John
Son of above, head of Dewrance & Co. engineers. Born London 13 March 1858. Educated Charterhouse and King's College, London. In 1882 he married Isabella Ann (died 1922), second daughter of Francis Trevithick, of Penzance, and granddaughter of Richard Trevithick, the ‘father of the locomotive’; they had a son and a daughter.. Died aged 79 on 7 October 1937. Dewrance was a prolific inventor who took out more than a hundred patents (114 according to his Presidential Address), mainly relating to steam fittings and boiler mountings. President IMechE in 1923: Presidential Address. In 1899 he became chairman of Babcock & Wilcox Ltd. and of the pioneering companies in the Kent coalfield. During WW1 he was a member of the Advisory Committee of the Treasury, the Ministry of Munitions, the Ministry of Labour and the Department of Overseas Trade. He was made a K.B.E. in 1920. High Sheriff of Kent in 1925. ODNB entry by H.M. Ross, revised Anita McConnell According to Who Was Who resided at Wretham Hall, Thetford at time of death. Obituary Loco, Rly Carr. Rev., 1937, 43, 325.