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
GB19087/26A
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Individual
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Individual
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Publication date
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Publication of GB256267ApublicationCriticalpatent/GB256267A/en
256,267. Loewe, S. Aug. 1, 1925, [Convention date]. Vacuum tubes.-In a valve having two control grids, for use in a wireless system having two receiving circuits for preventing interference, the grids are mounted in the same surface so as to exert the same controlling action. In one arrangement the grids consists of helices of the same diameter. As shown in Fig. 2, the grids consist of rods 17, 18 mounted alternately on end rings 12, 13, around a cathode 1. A spacecharge grid 11 and an anodeprotecting grid, not shown, may be provided.