Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Patent
1986-12-15
1989-04-25
Blum, Theodore M.
Electric lamp and discharge devices
Electrode and shield structures
Filament or resistance heated electrodes
H01J 116, H01J 1910
Patent
active
048251194
ABSTRACT:
A low consumption electron gun is provided for cathode ray tubes. The heating filament of the cathode includes a resistant wire and lugs for connection to an electric energy supply. The resistant wire is wound spirally. The active part of the heating filament is formed of at most two turns, each of which is formed by a multiplicity of elementary turns; the connecting lugs have a core made from a low electric resistance metal which short circuits the elementary turns of the resistant wire.
REFERENCES:
patent: 2359302 (1944-10-01), Curtis
patent: 3280452 (1966-10-01), Merritt
patent: 4151441 (1979-04-01), Puhak
Patents Abstracts of Japan, vol. 3, No. 92 (E-128), Aug. 4, 1979, p. 48 E 128; & JP-A-54 69 952 (Tokyo Shibaura Denki K.K.) 06-05-1979.
Patents Abstracts of Japan, vol. 1, No. 8, Mar. 16, 1977, p. 198 E 76; & JP A 51 113 451 (Tokyo Shibaura Denki K.K.) 10-06-1976.
Blum Theodore M.
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