Percy Ludgate
This article's lead section may be too short to adequately summarize the key points. (November 2023) |
Percy Edwin Ludgate | |
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Accountancy (1917) | |
Institutions | Kevans & Son (Dublin, Ireland) |
Percy Edwin Ludgate (2 August 1883 – 16 October 1922) was an
Life
Ludgate was born on 2 August 1883 in
Work on analytical engine
It seems that Ludgate worked as a clerk for an unknown corn merchant, in Dublin, and pursued his interest in calculating machines at night.[6] Charles Babbage in 1843 and Ludgate in 1909 designed the only two mechanical analytical engines before the electromechanical analytical engine of Leonardo Torres Quevedo of 1920 and its few successors, and the six first-generation electronic analytical engines of 1949.
Working alone, Ludgate designed an analytical engine while unaware of Babbage's designs, although he later went on to write about Babbage's machine. Ludgate's engine used multiplication as its base mechanism (unlike Babbage's which used addition). It incorporated the first
Ludgate's engine also used a mechanism similar to slide rules, but employing unique, discrete "Logarithmic Indexes" (now known as
Ludgate was one of just a few independent workers in the field of science and mathematics.[
Ludgate died of
Legacy
In 1991, a prize for the best final-year project in the Moderatorship in
In October 2022, a plaque from the National Committee for Commemorative Plaques in Science and Technology was unveiled at Ludgate's home in Drumcondra by the Provost of Trinity College, Linda Doyle. (As can be seen in the photo, the year of birth is listed incorrectly on the plaque.)[12][13]
References
- ^ Ludgate, Percy E. (April 1909). "On a proposed analytical machine". Scientific Proceedings of the Royal Dublin Society. 12 (9): 77–91.
- ^ a b "The legend of Percy Ludgate, Skibbereen's early answer to Bill Gates". The Irish Times. 6 February 2003.
- ^ a b c Randell, Brian (2009). "Ludgate, Percy". Dictionary of Irish Biography. Retrieved 13 October 2021.
- The National Archives of Ireland. 1901.
- The National Archives of Ireland. 1911.
- ^ ISBN 978-1-911566-29-8.
- doi:10.1038/081014a0.
- ^ Ludgate, P. E. (1914). "Automatic calculating machines". In Ellice Martin Horsburgh (ed.). Napier tercentenary celebration: Handbook of the exhibition of Napier relics and of books, instruments, and devices for facilitating calculation. Royal Society of Edinburgh. pp. 124–127.
- .
- ^ "The John Gabriel Byrne Computer Science Collection online catalog". www.scss.tcd.ie. Ireland: Trinity College Dublin.
- ^ "Percy E. Ludgate Prize in Computer Science" (PDF). www.scss.tcd.ie. Ireland: Trinity College Dublin.
- ^ "Science plaque unveiled to honour inventor Percy Ludgate". www.tcd.ie. 21 October 2022. Retrieved 22 October 2022.
- ^ "Unveiling of a Science Plaque to Percy Edwin Ludgate" (PDF). www.scss.tcd.ie. 15 October 2022. Retrieved 15 October 2022.
Bibliography
- Ludgate, Percy E. (April 1909). "On a proposed analytical machine". Scientific Proceedings of the Royal Dublin Society. 12 (9): 77–91. Available on-line at: Fano.co.UK
- Ludgate, P. E. (1914). "Automatic calculating machines". In Ellice Martin Horsburgh (ed.). Napier tercentenary celebration: Handbook of the exhibition of Napier relics and of books, instruments, and devices for facilitating calculation. Royal Society of Edinburgh. pp. 124–127.
- doi:10.1093/comjnl/14.3.317. (A subscription to the journal or payment on a per-article basis is required to view this article) – full version[dead link]
- S2CID 1737953.
- McQuillan, David. "The Feasibility of Ludgate's Analytical Machine". Retrieved 12 December 2022.
- "Percy E. Ludgate" (PDF). (extensive background and research document), and "related folder".. In: online catalog of The John Gabriel Byrne Computer Science Collection
- Brian Coghlan (2019) "An exploration of the life of Percy Ludgate": "without animation" (PDF). and "with animation" (PDF)., presented at the West Cork History Festival 2019, Skibbereen, Ireland
- Coghlan, Brian; Randell, Brian; Hockie, Paul; Gonzalez, Trish; McQuillan, David; O’Regan, Reddy (2020). "Investigating the Work and Life of Percy Ludgate". IEEE Annals of the History of Computing. 43: 19–37. )
- Coghlan, Brian; Randell, Brian; Hockie, Paul; Gonzalez, Trish; McQuillan, David; O’Regan, Reddy (2021). "Percy Ludgate (1883-1922), Ireland's first computer designer". Proceedings of the Royal Irish Academy: Archaeology, Culture, History, Literature. 121C: 303. )
- "The John Gabriel Byrne Computer Science Collection". online catalog
- "Investigating Percy Ludgate and his Analytical Machine". Mobile-friendly Ludgate folder of the above catalog
- Coghlan, Brian; Randell, Brian (2022). Percy Ludgate (1883-1922): Ireland's First Computer Designer. The John Gabriel Byrne Computer Science Collection. pp. 1–240. )