Cathode structure and method of operating the same

Details Cathode structure and method of operating the same Cathode structure and method of operating the same

1977-04-04

1978-10-17

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Discharging devices with apertured electrode interposed...

Plural cathodes

313338, 313409, 313415, H01J 146, H01J 2110

Patent

active

041211308

ABSTRACT:
An insulating substrate is provided with a plurality of discrete electrode pads on a surface thereof. A thermionic line cathode, e.g., a directly heated filament, is positioned to one side of the substrate surface and extends across a surface of each one of the electrode pads. An apertured electrode is positioned in spaced relation to the cathode in a direction away from the surfaces of the electrode pads. The apertured electrode may include a single slit-shaped aperture or a plurality of colinear apertures. The structure may also include a pair of spaced parallel filter plates whose surfaces are disposed in parallel relation to the longitudinal axis of the line cathode and in orthogonal relation to the surfaces of the electrode pads. The filter plates function to collimate the electron flow emitted from the cathode.

REFERENCES:
patent: 2847597 (1958-08-01), Bowie
patent: 3740603 (1973-06-01), Kuhn
patent: 3935500 (1976-01-01), Oess et al.

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