Simplified process for fabricating dispenser cathodes

Details Simplified process for fabricating dispenser cathodes Simplified process for fabricating dispenser cathodes

1988-03-28

1989-06-06

Wieder, Kenneth

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

445 31, H01J 718, H01J 7385

Patent

active

048374806

ABSTRACT:
A dispenser cathode and method for making the same are disclosed wherein a mixture of tungsten and aluminate powders are pressed by a die into a foil sleeve. A heater assembly can be attached to the back of the pellet for activating the emissive material. An impregnated cathode therefore can be manufactured in a few hours by relatively inexpensive processing techniques.

REFERENCES:
patent: 2902620 (1959-09-01), Winter
patent: 4518890 (1985-05-01), Taguchi et al.

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