“David Sundstrand”的意思、由来-开放百科全书

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David Sundstrand

释义

References

{{Underlinked|date=September 2018}}David Sundstrand (1880-1930) was a Swedish-born American inventor of the 10-key adding machine, 10-key calculator keyboard, a 10-keypad now used on computer keyboards, and a co-founder of Sundstrand Corporation. His 1914 adding machine had the first now common place keyboard for 10-key calculators and numeric keypads. This 1914 invention was filed as patent No. 1198487.^[1]

This invention was seminal to the development of an extensive range of machines that continued for decades into the 1950s.

^[2]^[3]^[4]^[5]^[6]^[7]^[8]

References

1. ^Patent number: 1198487;Filing date: Mar 14, 1914;Issue date: Sep 19, 1916
2. ^[https://www.nytimes.com/1972/01/06/archives/oscar-sundstrand-inventor-dies-at-82.html?sq=inventor%2520dies&scp=107&st=cse New York Times:OSCAR SUNDSTRAND, INVENTOR, DIES AT 82;January 6, 1972]
3. ^[https://web.archive.org/web/20120901153523/http://www.diycalculator.com/sp-mechgold.shtml#A1 The Golden Age of Mechanical Calculators;The Evolution of the Modern Calculator Keypad]
4. ^History of Sundstrand machine tool corporation
5. ^Rockford Tool Company 1905
6. ^Patent number: 1329028;Filing date: Mar 11, 1912;Issue date: Jan 27, 1920
7. ^Retrocalculators;Sundstran adding machine
8. ^Sundstrand Corporation Company History;In 1914 David Sundstrand, Oscar's brother and an employee at the Rockford Milling Machine Company, developed a ten-key adding machine.

3 : 1880 births|1930 deaths|20th-century American inventors

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