Cathode for electron tube

Details Cathode for electron tube Cathode for electron tube

1995-02-23

1997-12-16

Patel, Ashok

Electric lamp and discharge devices

Electrode and shield structures

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

313337, 313270, H01J 113

Patent

active

056989377

ABSTRACT:
A cathode for an electron tube has a layer of electron-emissive substance containing alkaline earth metal carbonates having capillary crystals, to which 0.01-20.0 wt % of both a lanthanum (La) compound and a magnesium (Mg) compound or an La--Mg compound, based upon the weight of the alkaline earth metal carbonate, is added. The cathode enjoys full interchangeability with a conventional oxide cathode and a 15-20% longer lifetime.

REFERENCES:
patent: 3436584 (1969-04-01), Hughes et al.
patent: 4017808 (1977-04-01), Fein et al.
patent: 4073989 (1978-02-01), Wainer
patent: 4797593 (1989-01-01), Sato et al.
patent: 5030879 (1991-07-01), Derks
patent: 5066885 (1991-11-01), Morimoto et al.
patent: 5146131 (1992-09-01), Derks
patent: 5348934 (1994-09-01), Shaw

Affiliated with

Also associated with

Rating

Cathode for electron tube 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 electron tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode for electron tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-210003