Invented by Leonardo Torres in 1920, the Torres calculating machine is a machine that solves essential addition, subtraction, multiplication, and division problems using a simple manner. It was a ...

Daniel Lewin has estimated that Millionaire calculating machines with serial number 1600 date from 1905, and those with serial number 2800, from 1910. Hence the rough date of 1909 is assigned to the ...

Léon Bollée, “Calculating-Machine,” U.S. Patent 556720, March 17, 1896. This patent lists Bollée’s French, Belgian and British patent numbers in addition to describing the machine. Leon Bollée, ...

Customers were happy to buy electric ‘calculating machines’, as Thomas Watson senior insisted on calling them, from the same firm that had sold them their electromechanical predecessors.

18 thoughts on “ Antique Electromechanical Calculating Machines ” ultimatereality92 says: March 25, 2012 at 7:33 am It sounds and looks so beautiful. Report comment. Reply.

Calculating Machines Can Yield National Industrial Production Goals, Expert Says Mark III Calculator May Also Be Able to Predict Chances Of Couple's Marital Success. NO WRITER ATTRIBUTED.

The device appears to be a geared astronomical calculation machine of immense complexity. Today we have a reasonable grasp of some of its workings, but there are still unsolved mysteries.

The machine's rpm can then be converted to hours. For example, consider an individual ball bearing with a Basic Dynamic Capacity, C BD , rating of 3,000 lb. It is to carry an effective load, P eff ...