Electric lamp and discharge devices – Discharging devices with apertured electrode interposed... – Plural-parallel-section cathode with electrode surrounding...
Patent
1983-04-18
1986-04-15
Chatmon, Saxfield
Electric lamp and discharge devices
Discharging devices with apertured electrode interposed...
Plural-parallel-section cathode with electrode surrounding...
313309, 313348, 313447, 313449, 313454, 315 537, H01J 146, H01J 2110
Patent
active
045830215
ABSTRACT:
An improved electron gun is shown with a cathode having a smooth, concaved surface and a grooved pattern therein which matches, and is aligned with, the pattern of a shadow grid placed immediately before the cathode surface so that the outer, larger radius of curvature of the shadow grid closest to the cathode is substantially identical and concentric with the radius of curvature of the smooth, concave cathode surface. Beyond the shadow grid is a control grid which controls the flow of electrons emitted from the cathode toward an anode. The grooves which form the pattern within the cathode surface have tapered side walls and rounded outer and inner corners to improve the flow of emitted electrons and facilitate manufacture.
REFERENCES:
patent: 3377492 (1968-04-01), Oess
patent: 3484645 (1969-12-01), Drees
patent: 3500107 (1970-03-01), Beggs
patent: 4023061 (1977-05-01), Berwick et al.
patent: 4371809 (1983-02-01), Thomas et al.
Hechtel Johann R.
Herriott Ronald W.
Chatmon Saxfield
Cline Gerald L.
Litton Systems Inc.
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