[en] 24,850. Fleming, J. A. Nov. 16. Vacuum tubes. - Alternating currents of high frequency, particularly those employed in wireless telegraphy, are rectified by means of an apparatus consisting of a highly-incandescent conductor and a cold conductor enclosed in a highly-exhausted vessel. Negative electricity can pass from the hot conductor, but not to it, through the vacuum. The incandescent conductor is preferably a carbon filament b heated by a current from an insulated battery h, and should be heated to nearly 1700 C. The cold conductor is preferably platinum, aluminium, or carbon, and may be in the form of a tube c surrounding the filament.

Title
[en] Improvements in Instruments for Detecting and Measuring Alternating Electric Currents.
Application Number
GBD190424850
Publication Number
190424850 (A)
Application Date
November 16, 1904
Publication Date
September 21, 1905
Inventor
FLEMING JOHN AMBROSE
GB
Assignee
FLEMING JOHN AMBROSE
GB
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