Adrian Stephens (1795 – 25 December 1876) was an

English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national id ...

engineer, noted for inventing the

steam whistle A steam whistle is a device used to produce sound in the form of a whistle using live steam, which creates, projects, and amplifies its sound by acting as a vibrating system (compare to train horn). Operation The whistle consists of the ...

in 1833. Stephens was born in the

Penzance Penzance ( ; kw, Pennsans) is a town, civil parish and port in the Penwith district of Cornwall, United Kingdom. It is the most westerly major town in Cornwall and is about west-southwest of Plymouth and west-southwest of London. Situ ...

area of

Cornwall Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlan ...

and came to

Merthyr Tydfil Merthyr Tydfil (; cy, Merthyr Tudful ) is the main town in Merthyr Tydfil County Borough, Wales, administered by Merthyr Tydfil County Borough Council. It is about north of Cardiff. Often called just Merthyr, it is said to be named after Ty ...

Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...

, in 1827 to work at the

Dowlais Dowlais () is a village and community of the county borough of Merthyr Tydfil, in Wales. At the 2011 census the electoral ward had a population of 6,926, The population of the Community being 4,270 at the 2011 census having excluded Pant. Dowla ...

ironworks. The purpose of his invention was to act as a warning device on the boilers, and an early example can be seen in the museum at

Cyfarthfa Castle Cyfarthfa Castle ( cy, Castell Cyfarthfa; ) is a castellated mansion that was the home of the Crawshay family, ironmasters of Cyfarthfa Ironworks in Park, Merthyr Tydfil, Wales. The house commanded a view of the valley and the works, which ...

. Stephens did not

patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an sufficiency of disclosure, enabling disclo ...

the device, and it was adopted by the

Liverpool & Manchester Railway The Liverpool and Manchester Railway (L&MR) was the first inter-city railway in the world. It opened on 15 September 1830 between the Lancashire towns of Liverpool and Manchester in England. It was also the first railway to rely exclusively ...

after it had been seen in operation at Dowlais in 1835.steamindex.com
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References

Sources

{{DEFAULTSORT:Stephens, Adrian 1795 births English inventors People from Penzance 1876 deaths