Electron gun with reduced heating of the grid

Details Electron gun with reduced heating of the grid Electron gun with reduced heating of the grid

1993-06-21

1995-03-21

Brinich, Stephen

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313471, H01J 23065

Patent

active

053999355

ABSTRACT:
An electron gun comprises a cathode made of an emissive material with an active face emitting electrons through a control grid that is placed before the active face but has no contact with it. The active face has emissive zones and non-emissive zones. The non-emissive zones are formed by grooves hollowed out of the emissive material. The control grid has solid parts that directly face the grooves. Application to electron guns with reduced heating of the control grid. FIG. 5 .

REFERENCES:
patent: 3914651 (1975-10-01), Washburn
patent: 4107570 (1978-08-01), Washburn
patent: 4147953 (1979-04-01), Esterson
patent: 4583021 (1986-04-01), Herriott et al.
patent: 4994709 (1991-02-01), Green et al.

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