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Vacuum


1975 Fastest Earth-bound object, 7200 kph, in vacuum centrifuge, England

1954 IBM announces vacuum tube "electronic" brain that could perform 10 million operations an hour

1907 3-element vacuum tube patented by Dr. Lee De Forest

1906 Dr. Lee DeForest demonstrated his electrical vacuum tube (radio tube)

1901 Hubert Cecil Booth patents vacuum cleaner

1899 J. S. Thurman patents motor-driven vacuum cleaner

1898 James Wimshurst, British designer/inventor (vacuum pump), dies at 70

1873 Lee De Forest, Council Bluffs, inventor, Audion vacuum, radio, tube

1869 Ives W. McGaffey of Chicago patents 1st vacuum cleaner



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