GB863293A - Improvements in or relating to cathode supports for electron discharge tubes - Google Patents
Improvements in or relating to cathode supports for electron discharge tubesInfo
- Publication number
- GB863293A GB863293A GB1477/59A GB147759A GB863293A GB 863293 A GB863293 A GB 863293A GB 1477/59 A GB1477/59 A GB 1477/59A GB 147759 A GB147759 A GB 147759A GB 863293 A GB863293 A GB 863293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- ring
- cathode
- lead
- shape
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/26—Supports for the emissive material
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
863,293. Thermionic valves. PLESSEY CO. Ltd. Dec. 31, 1959 [Jan. 15, 1959], No. 1477/59. Addition to 838,099. Class 39(1). A cathode sleeve 1 is supported by a ring 5 formed in a cathode lead and encircling an end portion of the sleeve, the cross-sectional shape of this end portion having been elastically deformed due to its original shape differing from the shape of the aperture in the ring 5. As shown, the oval ring 5 is integral with a cathode lead 3 having a cranked shape so that the ring is coaxial with the portion or the lead sealed through the glass base 4. The sleeve 1 is formed with tag 2 by which it is electrically connected to the lead 3. The inner surface of the ring 5 is formed with a knife edge which only contacts the sleeve 1 at two or a few points. A notch may be provided in the sleeve 1 at the zone of contact to obtain axial location of the sleeve in the ring. The cathode sleeve may be of a tungstennickel alloy having a tungsten content of 35 to 40%, and may have a wall thickness of 0.0005 inch and a diameter of 0.04 inch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1477/59A GB863293A (en) | 1959-01-15 | 1959-01-15 | Improvements in or relating to cathode supports for electron discharge tubes |
| FR815620A FR1245263A (en) | 1959-01-15 | 1960-01-14 | Cathode for electronic devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1477/59A GB863293A (en) | 1959-01-15 | 1959-01-15 | Improvements in or relating to cathode supports for electron discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB863293A true GB863293A (en) | 1961-03-22 |
Family
ID=9722679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1477/59A Expired GB863293A (en) | 1959-01-15 | 1959-01-15 | Improvements in or relating to cathode supports for electron discharge tubes |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1245263A (en) |
| GB (1) | GB863293A (en) |
-
1959
- 1959-01-15 GB GB1477/59A patent/GB863293A/en not_active Expired
-
1960
- 1960-01-14 FR FR815620A patent/FR1245263A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1245263A (en) | 1960-11-04 |
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