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The calculator invented by William Schickard
In 1623 William Schickard invented a calculating machince called Speeding Clock or Calculating Clock. The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell. -
The success
Schickard succeeded in designing and building the first mechanical calculating device. -
Period: to
The calculator
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Becoming known
Schickard’s accomplishment went unknown and unheralded for 300 years, until his notes were discovered and publicized. -
The known calculator
it was not until Blaise Pascal’s invention gained widespread notice that Schickard's mechanical calculation came to the public’s attention. -
The perfect calculator
An improvement on Schickard’s design, it nevertheless suffered from mechanical shortcomings and higher functions required repetitive entries. -
First calculator
In 1885, Burroughs filed his first patent for a calculating machine. -
Updating the calculator.
In 1892 his patent was for an improved calculating machine with an added printer. The Burroughs Adding Machine Company in St. Louis, Missouri, went on to great success popularizing the inventor’s (Schickward) creation.
