Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1980-05-29
1986-08-05
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
3133601, H01J 2950
Patent
active
046045481
ABSTRACT:
The present invention is an improvement in an electron gun for use in a cathode ray tube. Such gun includes at least one cathode and a plurality of electrodes spaced from the cathode. At least two of the electrodes form a main focusing lens and the electrode nearest the cathode which forms the main focusing lens includes extrusions about an aperture therein. The improvement comprises means located at the end of the gun opposite the cathode for blocking the exit from the gun of electrons emitted from the extrusions.
REFERENCES:
patent: 2732511 (1956-01-01), Dichter
patent: 3772554 (1973-11-01), Hughes
patent: 3987328 (1976-10-01), Yoshida et al.
patent: 4137480 (1979-01-01), Torre et al.
patent: 4232246 (1980-11-01), Sakurai et al.
Alig Roger C.
Hernqvist Karl G.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Moore David K.
RCA Corporation
Whitacre Eugene M.
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