In ancient times, they called him - Adding machine. For myself, I have not found an answer. Perhaps you will succeed.
It is generally accepted that the first adding machine was created by Gottfried Wilhelm Leibniz (Leibniz's adding machine) in 1673.
The Leibniz-invented drive (Leibniz walking cylinder) was used in many computing machines for 300 years, until the 1970s.
Pascal's summing machine is an arithmetic machine invented by the French scientist Blaise Pascal in 1642. He invented it at the age of 19 … It allowed working with large numbers, up to 9,999,999..
The question is, how and with what was it created? What tool were all these gears, wheels made. What precision were they supposed to be?
And here is a later sectional model.
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What were the calculations for all these levers? Their bends, angles, etc. On a more primitive one? And on what were the calculations of the machines on which all these springs, bolts were made?.. I am not a supporter of conspiracy theories. I search and occasionally even find answers to riddles. I don't see it here yet. Write your opinion:
How is a 19-year-old guy with a primitive (by our standards) level of education in the 17th century, during epidemics, when they believed (according to the same scientists) that powdered finger bones heal! Invents and most importantly assembles such a technically complex mechanism?
What was the pendel of progress, if from 1640 to 1970 (330 years !!!) they used mechanical adding machines and over the next 20 years they rose to very powerful computers ?!
Do you have a feeling that at certain points in history, someone intervened and accelerated the development of civilization, giving it the necessary vector? For example, exterminate all people with energy abilities (psychics) and give mechanisms, thereby launching development along the path of technology and not bioenergy?