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Greenleaf Whittier Pickard

 
Newton, Mass.08.01.1956  Portland, Maine, U.S 14.02.1877-
  Detector crystal silicon (semiconductor)

 


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.
       
 

  
Biographical notes
       
 

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.





Documents
 

US Patent 836,531 for Means receiving intelligence communicated by electric waves on November 20, 1906