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Greenleaf
Whittier Pickard
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Newton, Mass.08.01.1956 Portland, Maine, U.S 14.02.1877-
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Detector crystal silicon (semiconductor) |
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Between
1902 and 1906 about 30,000 mineral experiences for the detection of
radio waves in 1906 and his patented detector with silicon crystals
thus contributing to the future research into semiconductors. |
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Biographical notes
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Attendance
at the Lawrence Scientific School at Harvard University and the
Massachusetts Institute of Technology Institute. In 1899 the
Smithsonian Institution, funded his research in the field of
broadcasting at Blue Hill Observatory in Milton, MA. From 1902 he
worked at American Wireless Telegraph and Telephone Company until
1906. During this period he experienced having way radio to
follow the work of Reginald Fessenden alternator high frequency
(radio). Between 1902 and 1906 about 30,000 mineral experiences for the
detection of radio waves in 1906 and his patented detector with silicon
crystals supplied by Westinghouse Electric Company, thereby
contributing to the future research into semiconductors. commercially
To promote its patent creates together with the two partners "Wireless
Apparatus Specialty Company" and appoint its detector Perikon, acronym
of "perfect contact Pickard . "After this experience continues his
studies in the field of radio frequency particularly on the propagation
and interference produced by sunspots.
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Documents |
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US Patent 836,531 for Means receiving intelligence communicated by electric waves on November 20, 1906 |
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