GB538940A - Improvements in cathode constructions for x-ray tubes - Google Patents
Improvements in cathode constructions for x-ray tubesInfo
- Publication number
- GB538940A GB538940A GB8084/40A GB808440A GB538940A GB 538940 A GB538940 A GB 538940A GB 8084/40 A GB8084/40 A GB 8084/40A GB 808440 A GB808440 A GB 808440A GB 538940 A GB538940 A GB 538940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- disc
- tube
- rim
- secured
- 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
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
- H01J35/064—Details of the emitter, e.g. material or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/06—Cathode assembly
- H01J2235/068—Multi-cathode assembly
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
538,940. X-ray tubes. BRITISH THOMSONHOUSTON CO., Ltd. May 6, 1940, No. 8084. Convention date, May 6, 1939. [Class 39 (i)] The thermionic cathode structure of an X-ray tube is mounted on a portion of the envelope formed of some substance which is a good conductor of heat so that the cathode is cooled by the external air. Fig. 2 shows a spiral filamentary cathode 31 mounted in a block 27 with tubular extension 35 secured to a metal disc 33 which has a rim 21 sealed to the glass 25 of the tube. The cathode leads are held in an insulating clamp 61 and are connected by flexible leads 67 to conductors 81 passing through insulating seals 87 attached to the disc 33. The seal between the rim 21 and glass 25 is protected by a tube 97 secured to the block 27. A modification is described in which the block 27 carries several distinct cathodes and in which the disc 33 and rim 21 are in one piece. A stem 34 secured to the disc 33 may carry the terminals of the tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US272222A US2250323A (en) | 1939-05-06 | 1939-05-06 | Cathode construction and lamp embodying the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB538940A true GB538940A (en) | 1941-08-21 |
Family
ID=23038905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8084/40A Expired GB538940A (en) | 1939-05-06 | 1940-05-06 | Improvements in cathode constructions for x-ray tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2250323A (en) |
| GB (1) | GB538940A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2732510A (en) * | 1956-01-24 | Electron | ||
| US11515117B2 (en) * | 2020-08-28 | 2022-11-29 | GE Precision Healthcare LLC | Biased cathode assembly of an X-ray tube with improved thermal management and a method of manufacturing same |
-
1939
- 1939-05-06 US US272222A patent/US2250323A/en not_active Expired - Lifetime
-
1940
- 1940-05-06 GB GB8084/40A patent/GB538940A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2250323A (en) | 1941-07-22 |
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