Heater for indirectly-heated cathode

Details Heater for indirectly-heated cathode Heater for indirectly-heated cathode

1986-08-18

1989-12-12

Griffin, Robert L.

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313341, 219236, 72135, H01J 116

Patent

active

048869953

ABSTRACT:
The improved structure of a heater for an indirectly-heated cathode which is used for CRTs or the like is disclosed. A core wire for a heater is wound around a mandrel into a primary winding so that the inner diameter of the primary winding is 4.3 to 6.0 times the diameter of the core wire. The primary winding may be further wound into a secondary winding.

REFERENCES:
patent: 3255375 (1966-06-01), Ward
patent: 3294125 (1966-12-01), Heine
patent: 4441048 (1984-04-01), Takaoka et al.

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