Ads
related to: calculator mechanical calculatorsebay.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
Electric motors were used on some mechanical calculators from 1901. [10] In 1961, a comptometer type machine, the Anita Mk VII from Sumlock comptometer Ltd., became the first desktop mechanical calculator to receive an all-electronic calculator engine, creating the link in between these two industries and marking the beginning of its decline ...
A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
A pinwheel calculator is a class of mechanical calculator described as early as 1685, and popular in the 19th and 20th century, calculating via wheels whose number of teeth were adjustable. These wheels, also called pinwheels, could be set by using a side lever which could expose anywhere from 0 to 9 teeth, and therefore when coupled to a ...
Mechanical calculator companies (1 C, 14 P) E. Electromechanical calculators (1 C) F. Flight computers (2 P) Pages in category "Mechanical calculators"
17th century mechanical calculators. The Renaissance saw the invention of the mechanical calculator by Wilhelm Schickard in 1623, [9] and later by Blaise Pascal in 1642. [10] A device that was at times somewhat over-promoted as being able to perform all four arithmetic operations with minimal human intervention. [11]
Pascaline (also known as the arithmetic machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen . [ 2 ]
Despite the mechanical flaws of the stepped reckoner, it suggested possibilities to future calculator builders. The operating mechanism, invented by Leibniz, called the stepped cylinder or Leibniz wheel, was used in many calculating machines for 200 years, and into the 1970s with the Curta hand calculator.
Odhner thought of his machine in 1871 while repairing a Thomas' Arithmometer (which was the only mechanical calculator in production at the time) and decided to replace its heavy, bulky Leibniz cylinder by a lighter, smaller pinwheel disk. This is why the two machines share the same name but look completely different.
Ads
related to: calculator mechanical calculatorsebay.com has been visited by 1M+ users in the past month