Updated: July 28, 2023 by Lisha Pace | Leave a Comment
Key Points: Who was Ryoichi Yazu? Ryoichi Yazu was a Japanese inventor. He is well known for his invention of Japan’s first […]
Updated: July 28, 2023 by Rebecca Bales | Leave a Comment
William and Hubert Hopkins machines The Hopkins brothers, William and Hubert, from Saint Louis, are the holders of more than […]
Updated: December 14, 2024 by Rebecca Bales | Leave a Comment
Ensign Electric Calculating Machine Ensign Electric Calculating Machine is a highly developed, electrically driven adding and subtracting machine, particularly suited […]
Updated: December 12, 2024 by Rebecca Bales | Leave a Comment
Gauss of Christel Hamann The German engineer Christel Hamann (1870-1948) (biography of Hamann) is an outstanding figure in the world […]
Updated: November 30, 2024 by Rebecca Bales | Leave a Comment
Mathias Bäuerle In 1903, the German clock manufacturer from Schwarzwäld — Bäuerle Uhrenfabrik (Clock Factory), Sankt Georgen, launched his adding […]
James White Many thanks to Mr. Denis Roegel, Professor at Loria, France, for his seminal work on White’s adding machine. In […]
Ramón Verea In 1878 Ramón Silvestre Verea García (1833-1899), a Spaniard, and newspaper publisher in New York, patented a direct-multiplying […]
Updated: July 28, 2023 by Heather | Leave a Comment
: Luigi Torchi was a carpenter and inventor who was credited for inventing the first direct multiplication machine. This […]
The problem with the world is that the intelligent people are full of doubts, while the stupid ones are […]
Izrael Abraham Staffel The Polish Jew Izrael Abraham Staffel was born in 1814 to an impoverished family in Warsaw, Poland, […]
Updated: December 7, 2024 by Rebecca Bales | Leave a Comment
Joseph Turck Joseph Abraham Valentine Turck (1870-1956) was a famous figure in the world of mechanical calculators. He is the […]
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: Chaim Zelig Slonimski The Polish/Russian Jew Chaim Zelig Slonimski (see biography of Chaim Zelig Slonimski) was a Hebrew publisher, […]
: Jean-Baptiste Schwilgué In 1844 the French Jean-Baptiste Schwilgué from Strasbourg (see biography of Jean-Baptiste Schwilgué), together with his son […]
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: Eduard Selling In 1886 the professor of mathematics at the University of Würzburg, Germany, Eduard Selling (1834-1920) (see biography […]
Updated: April 16, 2024 by History Computer Staff | Leave a Comment
Du Bois D. Parmelee In 1850 Du Bois (Dubois) D. Parmelee from New Paltz, state of New York, received the […]
Henry Pottin In the middle 1870s, the French engineer Henry Pottin patented the first key-set crank-operated machine and made the […]
: The Machines of David Roth The pin-wheel mechanism, known from the sketch of Leibniz and machines of Poleni (1709) […]
Who Was Willgodt Odhner? Willgodt Odhner was a Swedish inventor and engineer. He invented a mechanical calculator and founded a […]
Who was Wilhelm Küttner Friedrich Wilhelm Küttner (1841-1920), a German businessman from Burgk bei Potschappel (near Dresden), chose to spend […]
History of Computers and Computing, Mechanical calculators, 19th century, Maurel and Jayet The arithmaurel of Maurel and Jayet In 1841 in […]
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: The Adding Device of Kummer Several people experimented with versions of simple mechanical calculators that involved strips of metal with […]
: George Grant’s Calculating Machines Between 1872 and 1898, the American George Barnard Grant (see biography of George Barnard Grant) of […]
: Manipolatore Aritmetico of Niccola Guinigi (Created with the expert advice of Mr. Silvio Hénin, Milan, Italy) In the 1850s (or even […]
: Joseph Edmondson’s circular calculating machine In 1883 Joseph Edmondson from Halifax, England, received three Great Britain patents for a circular […]
