Electron tube having electrode centering means

Details Electron tube having electrode centering means Electron tube having electrode centering means

1979-02-28

1981-03-24

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313456, H01J 2902, H01J 2982, H01J 3138

Patent

active

042582849

ABSTRACT:
An electron tube, preferably a camera tube, has an improved structure for supporting and centering a cylindrical electrode within a tubular envelope having a precisely formed inner surface. The support structure comprises a centering ring that has a plurality of radial sectors formed to a ring circumference and a plurality of resilient radial finger-like members formed intermittent the radial sectors. The ring circumference is formed within a close spacing of the inner surface of the envelope and is attached to the electrode so that the ring circumference is substantially concentric with the outer surface of the electrode. The finger-like members of the ring are formed to define an outer diameter that is greater than the inner diameter of the envelope, so that when the electrode with the attached ring is inserted into the envelope, the members flexibly bear against the inner envelope surface and guide the ring into position without deforming the radial sectors. The concentricity of the electrode to the envelope is established by the spacing between the radial sectors and the inner surface of the envelope.

REFERENCES:
patent: 2897389 (1959-07-01), Salgo
patent: 2951962 (1960-09-01), Miller et al.
patent: 2991390 (1961-07-01), Shrader
patent: 3038094 (1962-06-01), Ney
patent: 3183388 (1965-05-01), Townsend et al.
patent: 3325672 (1967-06-01), Funahashi et al.
patent: 3529196 (1970-09-01), Bell

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