Thermionic cathode heater having reduced magnetic field

Details Thermionic cathode heater having reduced magnetic field Thermionic cathode heater having reduced magnetic field

1978-02-17

1979-11-27

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313337, 313341, H01J 115, H01J 1908, H01K 102

Patent

active

041762932

ABSTRACT:
An electrically resistive heater consisting of a helix of resistive wire, the helix being shaped into a toroid or a spiral, with the electrical return lead extending coaxially through the helix so as to provide a magnetic field of equal magnitude and opposite sense to that produced by current in the helix to cancel the magnetic fields.

REFERENCES:
patent: 2899591 (1959-08-01), Stein
patent: 3134691 (1964-05-01), Kopecky
patent: 3226806 (1966-01-01), Gatewood
patent: 3255375 (1966-06-01), Ward
patent: 3259784 (1966-07-01), Vogel

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