Integral-shadow-grid controlled-porosity dispenser cathode

Details Integral-shadow-grid controlled-porosity dispenser cathode Integral-shadow-grid controlled-porosity dispenser cathode

1980-06-19

1983-02-01

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313346DC, H01J 2946, H01J 1942

Patent

active

043718094

ABSTRACT:
In a controlled-porosity dispenser cathode of the type which has a foil w a plurality of holes covering the emitting material so that emitting material is dispensed through the holes to the electron-emitting surface of the foil and electrons are actually emitted through the holes and a small area surrounding each hole, a non-emitting shadow grid is laid down on the surface of the foil in such a configuration that it does not obstruct any of the emitting holes, has the same shape as the control grid, and is substantially in precise registration with the control grid.

REFERENCES:
patent: 3484645 (1969-12-01), Drees
patent: 3717503 (1973-02-01), Beggs
patent: 3818260 (1974-06-01), Elfe et al.
patent: 3852633 (1974-12-01), Hunter
patent: 4096406 (1978-06-01), Miram et al.
patent: 4101800 (1978-07-01), Thomas et al.
patent: 4254357 (1981-03-01), Haas et al.

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