Wikinventia — Atlas of discoveries and inventions · Industrial Age

Direct multiplication calculator — Ramón Verea

1878 AD · Transmission: Silenced
TechnologyInventionHispanic

Ramón Silvestre Verea García (Pontevedra, 1833 – Buenos Aires, 1899), a Galician journalist and writer based in New York, patents on 10 September 1878 the Verea Direct Multiplier (patent US 207918). The machine performs direct multiplications in a single lever movement using two ten-sided metal prisms with variable-diameter holes that encode the multiplication tables — a mechanism similar to the Jacquard loom. It can operate with numbers of up to nine digits and six in the multiplier. Edmund D. Barbour had patented a similar principle in 1872 (US), making Verea the second patented inventor of direct multiplication; however, his implementation was independent and technically distinct. Verea explicitly documented that he did not invent the machine out of economic need but to demonstrate Spanish inventive capacity against the American; he refused to commercialize it. The original prototype is preserved at IBM's headquarters in White Plains, New York, in the collection founded by Thomas Watson in 1930.

InstitutionNew York (independent inventor)
Historical regionNew York, United States (inventor of Galician origin)
Primary sourceVerea, R. — "Improvement in Calculating Machines", U.S. Patent 207918, September 10, 1878. Smithsonian National Museum of American History, object NMAH_694176
Secondary sourceKidwell, P. — "Ideology and Invention: The Calculating Machine of Ramon Verea" (Rittenhouse, vol. 9, 1995, pp. 33–41); Locke, L.L. — "The First Direct-Multiplication Machine" (Typewriter Topics, November 1926)
Original languageEnglish (patent) / Spanish (inventor's documentation)
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