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An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.
Jack St. Clair Kilby was an American electrical engineer who took part in the realization of the first integrated circuit while working at Texas Instruments (TI) in 1958. He was awarded the Nobel Prize in Physics on December 10, 2000. Kilby was also the co-inventor of the handheld calculator and the thermal printer, for which he had the patents. He also had patents for seven other inventions.
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The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world's first all-electronic desktop calculators. Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock Comptometer division, they used vacuum tubes and cold-cathode switching tubes in their logic circuits and nixie tubes for their numerical displays.
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A numeric keypad, number pad, numpad, or ten key, is the palm-sized, usually-17-key section of a standard computer keyboard, usually on the far right. It provides calculator-style efficiency for entering numbers. The idea of a 10-key number pad cluster was originally introduced by Tadao Kashio, the developer of Casio electronic calculators.
The Leahy–Smith America Invents Act (AIA) is a United States federal statute that was passed by Congress and was signed into law by President Barack Obama on September 16, 2011. The law represents the most significant legislative change to the U.S. patent system since the Patent Act of 1952 and closely resembles previously proposed legislation in the Senate in its previous session.
Ivar Waldemar Brogger, Jr. was a Norwegian-born, American electrical engineer and inventor. Brogger is credited with a number of patented inventions including invention of auto direction signal lights in 1933, as well as a low level of oil indicator in automobiles in 1928.
The Caldwell machine gun is a machine gun of Australian origin developed by Thomas Frederick Caldwell in 1915.
Oscar H. Banker was an Armenian American inventor who patented a number of works, including an automatic transmission for automobiles, the needleless inoculation gun, the primary controls of the first Sikorsky helicopter, and power steering. He is considered by some as the "father of automatic transmission." He is accredited as the inventor of the first practical automatic transmission, though Alfred Horner Munro of Canada patented an automatic transmission 14 years before Banker.
References
- ↑ Patent number: 1198487;Filing date: Mar 14, 1914;Issue date: Sep 19, 1916
- ↑ New York Times:OSCAR SUNDSTRAND, INVENTOR, DIES AT 82;January 6, 1972
- ↑ The Golden Age of Mechanical Calculators;The Evolution of the Modern Calculator Keypad
- ↑ History of Sundstrand machine tool corporation
- ↑ Rockford Tool Company 1905
- ↑ Patent number: 1329028;Filing date: Mar 11, 1912;Issue date: Jan 27, 1920
- ↑ Retrocalculators;Sundstran adding machine
- ↑ 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.
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