Heater for indirectly-heated cathode
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 6, 1991
Grant Date -
N/A
app pub date -
Mar 1, 1989
filing date -
Mar 7, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a heater for an indirectly-heated cathode having a double helical structure, a film which can be removed by heating at the temperature of 250.degree. to 350.degree. C. is disposed between adjacent portions in a vertical direction, of a helical core wire coated with an insulating layer. Since this film is disposed, the occurrence of cracks in the insulating layer can be prevented so that the insulating property between the heater and a cathode sleeve do not gel deteriorated and clogging of an electron beam aperture of a shadow mask can be prevented, too.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully