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John George Appold, FRS (14 April 1800, in
Centrifugal impeller
It should be mentioned that the medal was for the special form of pump, the principle having been known and acted upon many years before. Another invention of considerable value was a brake, employed in laying deep-sea telegraph cables. This apparatus was used in laying the first Transatlantic cable in 1858. Appold was very liberal in communicating his ideas to others. He was on terms of friendship with many of the chief engineers of his time, and was consulted by them frequently with advantage. He patented but few of his ideas, preferring generally to give them freely to the public.
His house was a museum of mechanical contrivances, such as doors which opened at a person's approach, and shutters which closed at the touch of a spring, while the same movement turned on and lighted the gas. Probably, had he been compelled to rely for his support on his mechanical talents, his inventions would have been further developed, and have been brought more prominently into notice than they were. As it was, he was a man of high reputation among his contemporaries, who left behind him but little to keep his name from forgetfulness.
He is commemorated with a memorial tablet inside
John George Appold, FRS (14 April 1800, in Shoreditch
Shoreditch is a district in the East End of London in England, and forms the southern part of the London Borough of Hackney. Neighbouring parts of Tower Hamlets are also perceived as part of the area.
In the 16th century, Shoreditch was an impor ...
, London – 31 August 1865, in Gloucestershire
Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean.
The county town is the city of Gl ...
) was a British fur dye
A dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do not chemically bind to the material they color. Dye is generally applied in an aqueous solution an ...
r and engineer
Engineers, as practitioners of engineering, are professionals who invent, design, analyze, build and test machines, complex systems, structures, gadgets and materials to fulfill functional objectives and requirements while considering the l ...
.
Biography
Appold was the son of a fur-skin dyer, established in Finsssbury. Succeeding to his father's business at the age of twenty-two, he introduced into it so many scientific improvements that he soon amassed a considerable fortune and was able to devote his time and attention to his favourite mechanical pursuits. His inventions, though numerous and evincing very great ingenuity, were not of the very highest class. Perhaps the most important of them was hiscentrifugal pump
Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic ...
. This procured him a 'council medal' at the Great Exhibition
The Great Exhibition of the Works of Industry of All Nations, also known as the Great Exhibition or the Crystal Palace Exhibition (in reference to the temporary The Crystal Palace, structure in which it was held), was an International Exhib ...
at the Crystal Palace
The Crystal Palace was a cast iron and plate glass structure, originally built in Hyde Park, London, Hyde Park, London, to house the Great Exhibition of 1851. The exhibition took place from 1 May to 15 October 1851, and more than 14,000 exhibit ...
in 1851, and it is highly commended in the report of the juries on that exhibition. Appold's pump with curved blades showed an efficiency of 68%, more than three times better than any of the other pumps present.It should be mentioned that the medal was for the special form of pump, the principle having been known and acted upon many years before. Another invention of considerable value was a brake, employed in laying deep-sea telegraph cables. This apparatus was used in laying the first Transatlantic cable in 1858. Appold was very liberal in communicating his ideas to others. He was on terms of friendship with many of the chief engineers of his time, and was consulted by them frequently with advantage. He patented but few of his ideas, preferring generally to give them freely to the public.
His house was a museum of mechanical contrivances, such as doors which opened at a person's approach, and shutters which closed at the touch of a spring, while the same movement turned on and lighted the gas. Probably, had he been compelled to rely for his support on his mechanical talents, his inventions would have been further developed, and have been brought more prominently into notice than they were. As it was, he was a man of high reputation among his contemporaries, who left behind him but little to keep his name from forgetfulness.
He is commemorated with a memorial tablet inside St Leonard's, Shoreditch
St Leonard's, Shoreditch, is the ancient parish church of Shoreditch, often known simply as Shoreditch Church. It is located at the intersection of Shoreditch High Street with Hackney Road, within the London Borough of Hackney in East London. The ...
and buried at West Norwood Cemetery
West Norwood Cemetery is a rural cemetery in West Norwood in London, England. It was also known as the South Metropolitan Cemetery.
One of the first private landscaped cemeteries in London, it is one of the " Magnificent Seven" cemeteries of L ...
.
References
{{DEFAULTSORT:Appold, John 1801 births 1865 deaths People from Shoreditch Fellows of the Royal Society Burials at West Norwood Cemetery