Jewna Jakobson 

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Complete Biography, History and Inventions

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Jewna Jakobson was a Hebrew clockmaker, mechanician, and by extension, a jeweler in the court of Polish magnates Radziwill in the town of Nieswiez.

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Early Life

Another historical artifact from Jewba, was a golden chalice, kept some time ago in a church in Gnezno village, near Poznan, Poland, which had an inscription, that it has been made by Jewna Jakobson in 1786.

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Invention 1 – The Mechanical Calculating Machine of Jewna Jakobson

Jewna Jakobson invented his mechanical calculating machine in 1793.

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Like almost all other mechanical calculating devices from the XVII, XVIII, and XIX centuries, the machine was intended for adding and subtracting.

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The machine is executed as a compact brass casket with dimensions 34.2 cm long, 21.8 cm wide, and 3.4 cm high. It has four chiseled legs, 1 cm high and 1,6 cm in diameter each.

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