Thermionic electron source with bonded control grid

Details Thermionic electron source with bonded control grid Thermionic electron source with bonded control grid

1976-05-10

1978-06-20

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Foraminous electrodes or shields

29 2514, 29 2517, 313349, 313447, 313452, H01J 146, H01J 152, H01J 1704, H01J 1938

Patent

active

040964060

ABSTRACT:
For a grid-controlled electron source to operate at extremely high frequencies, as in planar triodes, the control grid must be situated very close to the emissive cathode. Mechanical and thermal distortions have put minimum limits on grid spacings and hence on the maximum operating frequency of grid-controlled tubes. To overcome these limits the grid structure is formed as a network of web members which are part of a laminated sheet having metal layers bonded to opposite surfaces of an insulating layer. One metal layer is affixed to the emissive surface of a metallic matrix cathode and the other metal layer forms the control grid.

REFERENCES:
patent: 3154711 (1964-10-01), Beggs
patent: 3196043 (1965-07-01), Harris et al.
patent: 3278779 (1966-10-01), Szegho
patent: 3297902 (1967-01-01), Beggs
patent: 3638062 (1972-01-01), Beggs

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