Dispenser cathode structure for use in electron gun

Details Dispenser cathode structure for use in electron gun Dispenser cathode structure for use in electron gun

1990-12-31

1992-05-12

DeMeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For indirectly heated cathode

313337, 313346DC, H01J 2904, H01J 1922

Patent

active

051131102

ABSTRACT:
A dispenser cathode for an electron gun comprises a reservoir for holding thermoelectron emissive material. A sleeve having an outward flange at a top portion thereof and receives the reservoir at the upper portion thereof and receives a heating element at the other end. A heat shielding tube is provided with an inward flange at the top thereof that overlaps and is welded to the outward flange of the sleeve. A holder for supporting the heat shielding tube is secured thereto.

REFERENCES:
patent: 3159461 (1964-12-01), MacNair
patent: 3441779 (1969-04-01), Hubner
patent: 3495121 (1970-02-01), Katz
patent: 3495122 (1970-02-01), Hubner et al.
patent: 4165473 (1979-08-01), Falce
patent: 4400648 (1983-08-01), Taguchi et al.
patent: 4737679 (1988-04-01), Yamamoto et al.
patent: 4823044 (1989-04-01), Falce

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