JPS5464457A - Direct heating cathode for cathode ray tube - Google Patents
Direct heating cathode for cathode ray tubeInfo
- Publication number
- JPS5464457A JPS5464457A JP13107277A JP13107277A JPS5464457A JP S5464457 A JPS5464457 A JP S5464457A JP 13107277 A JP13107277 A JP 13107277A JP 13107277 A JP13107277 A JP 13107277A JP S5464457 A JPS5464457 A JP S5464457A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- heater
- ray tube
- alloy
- remaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title 1
- 239000000956 alloy Substances 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000010953 base metal Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
PURPOSE: To avoid open wire of heater and to establish longer life cathode, by constituting the ribbon heater coated with electron emission material at the center via base metal with the alloy of a given constitution.
CONSTITUTION: Between the supports 7, 7 fitted to the insulation substrate 4, the ribbon heater 1 coating the electron emission material 2 via the base metal 3 at the center is suspended. The heater 1 is an alloy having the composition of Mo 20 to 24.5 weight %, Fe 7 to 9 wt% and remaining Ni. Fe offers elasticity, Mo does hardness and Ni offers malleability, and Co of maximum 2.5% in wt.% can be made in the remaining Ni. When the heater 1 is within this composition, since thermal expansion coefficient is much more less, the tensile strength at non-operation is greater, and no damage to the creep breaking strength is not lost, then the cathode of longer life can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13107277A JPS5464457A (en) | 1977-10-31 | 1977-10-31 | Direct heating cathode for cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13107277A JPS5464457A (en) | 1977-10-31 | 1977-10-31 | Direct heating cathode for cathode ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5464457A true JPS5464457A (en) | 1979-05-24 |
Family
ID=15049330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13107277A Pending JPS5464457A (en) | 1977-10-31 | 1977-10-31 | Direct heating cathode for cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5464457A (en) |
-
1977
- 1977-10-31 JP JP13107277A patent/JPS5464457A/en active Pending
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