EdS
December 12, 2019, 11:58am
1
We’ve all heard of Babbage. But there were three other notable inventors or builders of analytical machines - machines capable of general computation. Here’s Brian Randell in 1980:
From Analytical Engine to Electronic Digital Computer: The Contributions of Ludgate, Torres, and Bush
Here’s a presentation on Ludgate and here’s a short document and a long one on his machine - it’s notable for being mechanical, multiplying using mixed-base logarithms, and performing division using a lookup table and multiplications. In 1909. (Another and short document here with diagrams.) (From this trove .)
Pages for logged out editors learn more
Percy Edwin Ludgate (2 August 1883 – 16 October 1922) was an Irish amateur scientist who designed the second analytical engine (general-purpose Turing-complete computer) in history.
Ludgate was born on 2 August 1883 in Skibbereen, County Cork, to Michael Ludgate and Mary McMahon. In the 1901 census, he is listed as Civil Servant National Education (Boy Copyist) in Dublin. In the 1911 census, he is also in Dublin, as a Commercial Clerk (Corn ...
Pages for logged out editors learn more
Leonardo Torres y Quevedo (Spanish: [le.oˈnaɾðo ˈtores i keˈβeðo]; 28 December 1852 – 18 December 1936) was a Spanish civil engineer and mathematician of the late nineteenth and early twentieth centuries. Torres was a pioneer in the development of the radio control and automated calculation machines, the inventor of a chess automaton, and a innovative designer of the three-lobed non-rigid Astra-Torres airship and the Whirlpool Aero Car located i...
Pages for logged out editors learn more
Vannevar Bush (/væˈniːvɑːr/ van-NEE-var; March 11, 1890 – June 28, 1974) was an American engineer, inventor and science administrator, who during World War II headed the U.S. Office of Scientific Research and Development (OSRD), through which almost all wartime military R&D was carried out, including important developments in radar and the initiation and early administration of the Manhattan Project. He emphasized the importance of scientific r...
4 Likes
dtmb
October 14, 2022, 12:17pm
2
And there is just an interesting article from the HNF blog. A small business thriller in which Ludgate and Zuse (and maybe IBM) act. (Unfortunately only in German, but with many references.)
1 Like