Electron gun having electrically isolated and adjustable cathode

Details Electron gun having electrically isolated and adjustable cathode Electron gun having electrically isolated and adjustable cathode

1995-07-19

1997-11-11

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313454, 313459, 21912126, 21912127, H01J 2946

Patent

active

056867859

ABSTRACT:
An electron gun for producing a beam of electrons has an elongated, linear thermionic cathode and a focusing electrode. The opposite ends of the cathode are engaged by adjustable holders which enable the spatial separation between the cathode and focusing electrode to be easily varied. The focusing electrode is electrically isolated from the cathode whereby fine tuning of the electron beam may be accomplished by varying the potential difference between the focusing electrode and cathode.

REFERENCES:
patent: 2090722 (1937-08-01), Bouwers
patent: 3483423 (1969-12-01), Hanks
patent: 3701915 (1972-10-01), Tsujimoto
patent: 4126811 (1978-11-01), Movchan et al.

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