Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB25674/23A
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Individual
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Individual
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Publication date
Application filed by IndividualfiledCriticalIndividual
Publication of GB205513ApublicationCriticalpatent/GB205513A/en
205,513. PÚri, F. Oct. 7, 1922, [Convention date]. Vacuum tubes.-In a grid consisting of a number of vertical elements 2 of rectangular shape mounted concentrically and radially about a filament cathode 3 by clipping upon two heads 10, the elements are formed with ribs and are preferably perforated as shown at 9 or of openwork construction. The electrostatic action of the grid may be improved by mounting a helix 11 in notches in the elements 2. The anode may consist of a number of vertical parabolic vanes 1 arranged opposite the spaces between the grid elements.