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Q.

Who was the first American to invent a mechanical calculating device?

Tags: american, mechanical calculating
Asked by pravin, 20 Dec '12 12:35 pm
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Answers (2)

1.

The mechanical calculator was invented in 1642 by Blaise Pascal, it was called Pascal's Calculator or Pascaline. The first commercially successful device, Thomas' arithmometer, was manufactured from 1851. The first machine with columns of keys, the comptometer, was introduced in 1887 while 10 key calculators and electric motors appeared in 1902. The use of electric motors allowed for the design of very powerful machines during the first half of the 20th century. In 1961, A full-keyboard machine, the Anita 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.
The calculating engines of Charles Babbage were the first automatic mechanical calculators in the world. Babbage started work on his analytical engine in 1834, "in less than two years he had sketched out many of the salient features of the modern computer.
Answered by vedprakash sharma, 20 Dec '12 12:44 pm

 
  
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2.

Charles Babbage
Answered by iqbal seth, 20 Dec '12 12:37 pm

 
  
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