Compactly built electron tube and fabrication method thereof

Details Compactly built electron tube and fabrication method thereof Compactly built electron tube and fabrication method thereof

1989-10-23

1991-05-21

DeMeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

313289, 313456, 445 34, 445 45, H01J 2982, H01J 918, H01J 188

Patent

active

050178270

ABSTRACT:
The disclosure concerns electron tubes. A tube such as a cathode-ray tube consists of several parts, namely the stem, the neck, the cone and the screen of the front face. To build a tube such as this more compactly while, at the same time, improving the quality of the fabrication, a new construction of the neck is proposed. In the prior art, the neck is a glass tube to which there is soldered a glass stem through which pass the connection terminals towards the various electrodes, internal to the tube. Here, the neck is built in the form of a stack of alternating metallic rings and ceramic rings. The metallic rings are used for the supporting of and electrical connection to the internal electrodes. The ceramic rings are used to insulate the metallic rings. The brazings between metallic rings and ceramic rings provide for vacuum tightness. The base of the tube is a ceramic washer without drillings other than lateral ones for the connections to pass through. The connections are made chiefly around the neck on the metallic rings.

REFERENCES:
patent: 2967260 (1961-01-01), Eitel
patent: 2977494 (1961-03-01), Johnstone et al.
patent: 3204140 (1965-08-01), Kearns
patent: 3383537 (1968-05-01), Marshall
patent: 3979634 (1976-09-01), Jaillet et al.
patent: 4039877 (1977-08-01), Wimmer
patent: 4713520 (1987-12-01), Van Nice et al.

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