Anode tube

Design features of the Stationary anode tube (pg168) Glass envelope; made from borosilicate glass in order to stand high temperatures. Also acts as an electrical insulator between the negative cathode and positive anode. Contains the vaccum and supports the electrodes. Vaccum; All air is excluded within the glass envelope. This prevents oxidation of the electrodes and acts as an electrical insulator. Also ensures that thermionic electrons moving across the tube do not collide with any …

…Rotor of induction motor; rotates the anode Inside the glass envelope Copper cylinder around inner spindle Anode stem attached to one end Made of copper which is a good electrical conductor Outer surface of the rotor is painted black so that heat is radiated away from the ball bearings Glass neck of insert as narrow as possible at this point to provide as small a distance as possible between the rotor and the stator windings.