(under subclass 326) Electrodes and shields which are in the form of tubes or hollow sleeves.
SEE OR SEARCH THIS CLASS, SUBCLASS:
331, where the tubular or hollow sleeve electrode or shield is provided with a lead wire or connector.
337+, where the tubular or hollow sleeve electrode is part of an indirectly heated cathode.
341, where the tubular or hollow sleeve electrode is a filament or resistance heated electrode.
346, where the tubular or sleeve electrode is made of a material containing or is coated with electron emissive material or at least partially encloses a body or mass of electron emissive material. 348+, where the tubular or hollow sleeve is formed of foraminous or open work material.
354, where the tubular or sleeve electrode contains a core made of a different composition from the composition of the tube or sleeve material.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
39.77, for discharge devices having a hollow tubular electrode formed so as to provide a structure having distributed inductance and capacitance (e.g., cavity resonator), and operable in a magnetic field (e.g., magnetrons), and for the electrode, per se.
