Directly heated cathodes

Details Directly heated cathodes Directly heated cathodes

1987-05-08

1989-03-07

Moore, David K.

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313341, 313345, 313352, 313254, 313 3963, H01J 113

Patent

active

048109258

ABSTRACT:
A directly heated cathode comprises a metal tube having a filling of powdered metal which extends beyond the tube and in which is embedded an electrical wire which is coaxial and extensive with said the outer tube over part of its length. The electrical wire is coated with insulating material which is normally alumina. The tube, the metal powder filling and the wire are sintered together, giving a relatively robust structure.

REFERENCES:
patent: 633350 (1899-09-01), Thowless
patent: 792001 (1905-06-01), Callan
patent: 1701356 (1929-02-01), Bruckel et al.
patent: 1881644 (1932-10-01), Jones
patent: 2092815 (1937-09-01), Shaw
patent: 2172207 (1939-09-01), Kolligs
patent: 2473550 (1949-06-01), Spencer
patent: 2675948 (1954-04-01), Cronin
patent: 2682511 (1954-06-01), Cronin
patent: 3221203 (1965-11-01), Ragland, Jr.
patent: 3766423 (1973-10-01), Menelly
patent: 4634921 (1987-01-01), Williams et al.

Affiliated with

Also associated with

Rating

Directly heated cathodes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directly heated cathodes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directly heated cathodes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1670590