Device for the production of coatings from emitting substances on a carrier body
DE663312C
Indirectly heated glow cathode, in which an insulating piece is surrounded by a thin metal foil
DE569747C
Process for improving the vacuum in electrical discharge vessels
DE631786C
Incandescent cathode made of high-melting material with a coating of highly emissive substances and an intermediate layer of stable oxides
DE564869C
Discharge vessel for generating, receiving and amplifying alternating currents
DE560138C
Process for the production of metal coatings on porous insulating bodies, in particular on insulating tubes of indirectly heated cathodes of electrical discharge vessels
DE649690C
Process for the production of hydrides
DE618917C
Indirectly heated glow cathode
DE593936C
Process for the production of coated glow cathodes
DE568847C
Process for the production of coated wires for electrical discharge vessels
DE548299C
Process for the production of electrical discharge vessels
DE593006C
Apparatus for making bodies emitting electrons
DE598124C
Electrical discharge vessel with control electrode and V-shaped cathode between two anode plates
DE607297C
Glow cathode for electrical discharge vessels
DE566466C
Process for the production of a metallic intermediate layer made of silver between a base made of refractory metals and an emitting surface for coated glow cathodes
DE599685C
Discharge vessel with glow cathode
DE615024C
Process for degassing large-area anodes in glow cathode tubes by means of electron bombardment emanating from the cathode
DE648481C
Discharge vessel for direct alternating current heating
DE659650C
Device for applying emitting substances by means of a spray gun guided along the carrier body
DE533478C
Arrangement of resistance bodies housed in closed vessels
