The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 144
of valve is shown in Fig. 47. The re-entrant tubes are made longenough to give rigid support to the electrodes. The anode can bein the form of two parallel plates placed on either side of thefilament or in the fonn of a cylinder or preferably a flattened cylin-der completely surrounding the… … Fig. 47. For voltages not exceeding a few hundred volts both electrodescan be supported from the same press, as shown in Fig. 48. Thisis desirable because the whole structure can then be assem})ledand the spacing accurately adjusted before sealing it into thebulb. If the voltage exceeds a few…
Telegraph, Wireless
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