Electron beam device having an electron gun and a method of maki

Details Electron beam device having an electron gun and a method of maki Electron beam device having an electron gun and a method of maki

1988-03-16

1989-08-01

Ramsey, Kenneth J.

Electric lamp and discharge devices

Cathode ray tube

Envelope

65110, 445 34, 313450, H01J 928, H01J 2990

Patent

active

048535893

ABSTRACT:
An electron gun for an electron beam device comprises a vitreous elongate tubular body (22) having a plurality of electrodes (24, 27 to 31 and 33 to 37) provided therein. Electrical connections (50, 52, 54) to at least some of these electrodes comprise respective conductors extending within the thickness of the wall of the tubular body (22). The tubular body is made by uniting inner and outer cylindrical members under the influence of heat while drawing them under sub-atmospheric pressure onto a profiled mandril, the electrical connections (50, 52 and 54) having been prepositioned on the inner cylindrical member.

REFERENCES:
patent: 2200911 (1940-05-01), Bowie
patent: 3040205 (1962-06-01), Walker
patent: 3375390 (1968-03-01), Schlesinger
patent: 4213557 (1980-07-01), Franzen
patent: 4334904 (1982-06-01), Apothaker et al.
patent: 4713879 (1987-12-01), Vrijssen

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