Thermionic cathode heater

Details Thermionic cathode heater Thermionic cathode heater

1984-07-03

1987-01-06

Dixon, Harold

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

2504922, H01J 115

Patent

active

046349219

ABSTRACT:
A heater for a thermionic cathode for producing an electron beam includes a central wide and a hollow cylindrical conductor with the wire disposed coaxially thereof. The wire and the cylindrical conductor are electrically connected at one end of the heater and at the other end include means for connecting to a power source. Equal electrical currents thus flow in opposite directions in the wire and the cylindrical conductor so that the magnetic fields produced thereby tending to deflect the electron beam cancel each other.

REFERENCES:
patent: 1682642 (1928-08-01), Van Der Pool
patent: 1701356 (1929-02-01), Bruckel et al.
patent: 1814681 (1931-07-01), Franklin
patent: 1878089 (1932-09-01), Albershein
patent: 1881644 (1932-10-01), Jones
patent: 2057931 (1936-10-01), Stupakoff
patent: 2089817 (1937-08-01), Stutsman
patent: 4382186 (1983-05-01), Denholm et al.
patent: 4473777 (1984-09-01), Steinberg

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