Directly-heated cathodes

Details Directly-heated cathodes Directly-heated cathodes

1983-08-18

1986-01-07

Lindsay, Robert

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313 20, 313 30, 313 33, A47B 8800

Patent

active

045636095

ABSTRACT:
A directly-heated cathode for power electron tubes such as triodes, tetrodes or pentodes comprises a cylindrical sleeve constituted by a lattice of crossed wires forming the emissive portion of the cathode and by two conductive plates attached respectively to each end of the sleeve. In order to permit free deformation of the cathode, a flexible metallic bellows element is fixed between one of the plates and the corresponding end of the cylindrical sleeve.

REFERENCES:
patent: 2431767 (1947-12-01), Murdock et al.
patent: 2615137 (1952-10-01), Duke
patent: 2882436 (1959-04-01), Dorgelo
patent: 2928978 (1960-03-01), Morton
patent: 3152276 (1964-10-01), Dorgelo

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