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Bryan Donkin
Bryan Donkin
Born
22 March 1768Sandoe, Northumberland
Died
27 February 1855
Nationality
English
Bryan Donkin (22 March 1768 27 February 1855) was an English engineer and industrialist. Of his six sons, John, Bryan, and Thomas also became engineers.
Contents
1 Early life
2 Career
2.1 Fourdrinier machine
2.2 Printing machinery
2.3 Tinned food
2.4 Difference engine
3 Civil engineering
4 Other work
5 Institutions
6 Notes
7 References
8 External links
//
Early life
Born in Sandoe, Northumberland, his father was a surveyor and land agent. Donkin initially began work in the same business, and worked for a year or two as land agent to the Duke of Dorset.
Career
While working for the Duke of Dorset, Donkin consulted the engineer John Smeaton, an acquaintance of his father, as to how he could become an engineer. At Smeaton's advice in 1792 he apprenticed himself to John Hall in Dartford, Kent, who had founded the Dartford Iron Works in 1785. Shortly after completing his apprenticeship, he set himself up in Dartford, with the support of John Hall, making moulds for paper works, for at that time all paper making was done by hand. In 1798 he married Mary Brames, daughter of Peter Brames, a neighbouring land owner and market gardener, and a prominent supporter of the Methodist movement. By doing so Donkin became brother in law to John Hall, who had married Mary's elder sister Sarah in 1791.
Fourdrinier machine
Main article: Fourdrinier machine
In 1801-2 Donkin was entrusted with the construction of a prototype of a paper-making machine, the famous Fourdrinier machine, the perfection of which had caused some considerable problems. Donkin took premises at Bermondsey, London in 1802, thus starting the enterprise that became the Bryan Donkin Company, which still continues in business in the early 21st century. In 1804 he succeeded in producing a working machine. A second, improved one, was made the following year and in 1810 eighteen of the complex machines had been erected at various mills. Although the original design was not Donkin's, he received the credit for having perfected them and brought them into use. His company continued to make such machines, and by 1851 had produced nearly 200 machines for use across the world.
Printing machinery
Donkin also worked with printing machinery. In 1813 he and a printer, Richard Mackenzie Bacon of Norwich, obtained a patent for a "Polygonal printing machine"; this used types placed on a rotating prism. Ink was applied by a roller which rose and fell with the irregularities of the prism, and the paper was wrapped around a second prism. One of these machines was set up for Cambridge University. It however proved too complicated and suffered from poor inking, which prevented its success. However, it was the first machine to introduce composition ink rollers which were considered better than Friedrich Koenig's leather-covered rollers.
Tinned food
Donkin had by now become a partner in John Hall's firm and had become interested in the problem of canning food in metal containers. After various experiments, he acquired Philippe de Girard's patent in 1812 for the sum of ?1000 and in association with Hall and Gamble he set up a canning factory in Bermondsey, the first cannery to use tinned iron containers. Donkin applied to the British Admiralty for a test of his product and the first sizable orders were placed in 1814 with the firm of Donkin, Hall and Gamble for meat preserved in tinned iron canisters. The firm of Donkin, Hall and Gamble was later merged into Crosse & Blackwells.
Difference engine
In 1829, Charles Babbage requested Donkin's assistance with George Rennie (engineer), in investigating the ownership of intellectual property, tooling and piece-parts of the difference engine, whose manufacture had been commissioned by Babbage from Joseph Clement.
In 1857 the British government authorized the sum of ?1200 for a full-scale difference engine with attached printing apparatus based on the design of Per Georg Scheutz and his son Edvard to be constructed by Donkin's company, which had acquired a reputation for building machines for the colour printing of banknotes and stamps. Costs overran and Donkin delivered the machine in July 1859, several weeks past the deadline, incurring a loss of ?615.
Despite the engine's printing unit working badly, the Royal Society and the Astronomer Royal were generally positive when they inspected it on August 30 1859, expressing their satisfaction at its construction. Donkin was unhappy that he had lost so much money on the project, which he attributed to the engine's unexpected intricacy and the fact that he had had very little to base his original cost estimate on, Edvard Scheutz having...(and so on)

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