Cathode construction for linear beam tubes

Details Cathode construction for linear beam tubes Cathode construction for linear beam tubes

1976-12-27

1979-04-03

Smith, Alfred E.

Electric lamp and discharge devices

Discharging devices with apertured electrode interposed...

Plural interposed apertured electrodes

313339, 313349, 313353, 313454, 313447, H01J 146, H01J 152, H01J 1938

Patent

active

041479530

ABSTRACT:
A linear beam tube is provided with a gridded electron gun in which a concave cathode surface is provided with concave channels from which electrons are emitted. The channels may be arranged as concentric annuli. In a preferred embodiment the channels extend radially outwards from the center of the cathode to minimize the effects of temperature distortion. The cathode is provided with a shadow grid and a control grid is spaced from and aligned therewith.

REFERENCES:
patent: 3119041 (1964-01-01), Harris
patent: 3967150 (1976-06-01), Lien et al.
patent: 4031425 (1977-06-01), Ziegler et al.

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