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Mechanical Calculators

Mechanical Calculators. Ashlee Jenkins and Kailey Meadows. Our definition . A calculator in which one must operate by hand to get mathematical information for a simple problem. Definition.

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Mechanical Calculators

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  1. Mechanical Calculators Ashlee Jenkins and Kailey Meadows

  2. Our definition • A calculator in which one must operate by hand to get mathematical information for a simple problem.

  3. Definition • One that calculates, as: An electronic or mechanical device for the performance of mathematical computations. • A person who operates such a machine or otherwise makes calculations.

  4. Abacus • The first of adding and subtracting machines so to speak. • You could only add and subtract. • Other functions had to be done more complicatedly. • Derived from Latin. • The abacus’ we know came form Rome, China, and India.

  5. Pascal • We know of him from his work with the triangle. • Born 1623-1662. • His machine also could only add and subtract.

  6. Leibniz • Used Pascal's original ideas to develop his own calculator. • Called it the Step Reckoner. • Entered university at fifteen years old.

  7. Charles X Thomas • 1820 Thomas made a machine he called the arithmometer based of Leibniz design it could only perform four functions. Between 1820 and 1878 his machine sold about 1500.

  8. Victor Schilt • Produced a key-driven adding machine in London in 1851 at the Crystal Palace Exposition.

  9. Imperial Office Master • Made in Germany by W. Feiler, G.M.B.H. • Can print up to 999,999,999 characters. • Made in the late 1970’s • Produced in London • One of the late Mechanical Calculators

  10. Why is it Important? • These first calculators paved the way to the automatic calculators we use everyday. • Without the hard work of many men which took over 200 years. • These calculators even began the process of the computer because the first computers could only add and subtract. • Without these first building blocks our world could have been very different.

  11. Bibliography • http://www.diycalculator.com/sp-mechcalc.shtml • http://www.vintagecalculators.com/html/calculator_time-line.html • http://www.xnumber.com/xnumber/mechanical1.htm • http://mathsforeurope.digibel.be/Mechanicalcalculators.html • www.vintagecalculators.com/html/mechanical_calculators.html

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