Abstract:
In a magnetron comprising a cathode electrode, an anode electrode surrounding the cathode electrode and end shields mounted on the opposite ends of the cathode electrode, the inner surfaces of one or both end shields are provided with thin layers of a powder of tungsten, molybdenum, or alloys thereof.
Abstract:
An electron discharge tube has its cathode carried by a supporting structure constituted by a closed hollow container which is in good heat exchanging relation with the cathode. In the container is a quantity of sodium, potassium, caesium, rubidium, lithium or an alloy of two or more of these metals having a boiling point equal to the desired cathode operating temperature. In operation the container acts as a boiler and condenser for the material.
Abstract:
A directly heated dispenser-type cathode for microwave tubes and the like, the cathode being formed by a solid electrically conductive substrate, such as tungsten wire, the surface of which has bonded thereto a porous layer of a refractory metal whose pores are impregnated with an electron-emissive material having a low work function, such as barium oxide.