Cathode for an electron source and a method of producing the sam

Details Cathode for an electron source and a method of producing the sam Cathode for an electron source and a method of producing the sam

1978-04-18

1980-03-11

Smith, Alfred E.

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

29 2514, 313336, H01J 115, H01J 918

Patent

active

041930134

ABSTRACT:
A cathode for an electron source according to this invention comprises an emitter tip made of an electron emissive material, a filament for holding the emitter tip, and a binder for binding the emitter tip and the filament, the filament and the binder being made of glassy carbon. The binder can have a carbide or boride powder incorporated therein. The cathode according to this invention can be produced by using a thermosetting resin of predetermined shape as the starting material of the filament, fixing the emitter tip to a predetermined position of the thermosetting resin with the adhesive agent made of the raw thermosetting resin, and heating the resultant assembly in a non-oxidizing atmosphere to carbonize the resinous portions. This cathode is structurally very simple. Moreover, the adhesion between the filament and the emitter tip is excellent, and the emitter tip can be heated to high temperatures above 2,000.degree. C. by causing current to flow through the cathode.

REFERENCES:
patent: 3532923 (1970-10-01), Vogel
patent: 4054946 (1977-10-01), Ferris et al.

Affiliated with

Also associated with

Rating

Cathode for an electron source and a method of producing the sam does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cathode for an electron source and a method of producing the sam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode for an electron source and a method of producing the sam will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2002774