- January 8 , 1956 , Newton, Massachusetts ) was a United States Radio pioneer.
Pickard was a researcher in the early days of Wireless . He experimented with Crystal Detectors , used in Crystal Radio Receiver s.
On August 30 , 1906 he filed a patent for a Silicon Crystal detector, which was granted on November 20 , 1906 . {Link without Title}
Pickard's detector was revolutionary in that he found that a fine pointed wire known as a "cat's whisker", in delicate contact with a mineral produced the best Semiconductor effect.
Greenleaf Whittier Pickard was named after his great-uncle, the American Quaker John Greenleaf Whittier (1807-1892).
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- - ''Electrostatic separation''
- - ''Electrostatic separation''
- - ''Electrostatic separation''
- - ''Electrostatic separation''
- - ''Means for receiving intelligence communicated by electric waves'' (silicon detector), 1906
- - ''Electrostatic separator'',1907
- - ''Means for receiving intelligence communicated by electric waves'' ( Copper Sulfate solution detector), 1907
- - ''Intelligence intercommunication by magnetic wave component'', 1908
- - ''Means for receiving intelligence communicated by electric waves'' (spring-loaded detector contact), 1908
- - ''Oscillation receiver'' (fused zinc oxide detector), 1908
- - ''Oscillation receiver'' (polished silicon detector, 1908
- - ''Oscillation detecting means'' ( Molybdenite detector), 1908
- - ''Oscillation detector and rectifier'' ("plated" Silicon Carbide detector with DC bias), G.W. Pickard, 1909
- - ''Oscillation receiver'' (fractured surface red zinc oxide ( Zincite ) detector), 1909
- - ''Oscillation device'' (iron pyrite detector), 1909
- - ''Detector for wireless telegraphy and telephony'' (looped or humped springy wire detector contact), 1914
- - ''Oscillation detectors'' (pairs of minerals), 1914
- - ''Valve detector for wireless'' (vacuum tube with conducting shield to drain static), 1915
- - ''Receiver for wireless telephony and telegraphy'' (interrupted or switched circuit instead of rectifier), 1916
- - ''Means for receiving intelligence communicated by electric waves'' (receiving circuit, divided from #836531), 1917
- - ''Optical selection of split mica sheets''
- - ''Distinguishing dielectric sheets''
- - ''Electrical reactance and method and apparatus''
- - ''Extreme loading condenser''
''Reissued''
- - ''Means for receiving intelligence communicated by electric waves''
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