Indirectly heated cathode for a gas discharge tube

Details Indirectly heated cathode for a gas discharge tube Indirectly heated cathode for a gas discharge tube

1991-10-01

1992-10-27

DeMeo, Palmer C.

Electric lamp and discharge devices

Electrode and shield structures

Indirectly heated cathodes

313337, H01J 124, H01J 1706, H01J 1750

Patent

active

051592363

ABSTRACT:
An indirectly heated cathode incorporated in a gas discharge tube with a discharge current of 0.2 to 0.4 A has a cathode surface area in a range of 10 to 30 mm.sup.2. A cathode cylinder is made of molybdenum, nickel or alloy thereof. A heater coated with alumina for insulation is inserted into the cylinder in such a manner that the distance between the heater and cylinder is 0.1 mm or less, and coil gaps of the heater are set to 0.15 mm or less. Alternatively, the space between the heater and cylinder is filled with alumina. As a result, the ratio of a heat quantity by forced heating to a heat quantity for starting discharge is made 0.3 or less.

REFERENCES:
patent: 1889087 (1932-11-01), Crowley
patent: 4379980 (1983-04-01), Takanashi et al.
patent: 4441048 (1984-04-01), Takaoka et al.
Patent Abstracts of Japan, Unexamined Applications, E Section, vol. 4, No. 15, Feb. 5, 1980, pp. 85 E 170, No. 54-156-464.

Affiliated with

Also associated with

Rating

Indirectly heated cathode for a gas discharge 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 Indirectly heated cathode for a gas discharge tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indirectly heated cathode for a gas discharge tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-907629