GB410337A - Improvements in or relating to vapour apparatus for electric discharges - Google Patents
Improvements in or relating to vapour apparatus for electric dischargesInfo
- Publication number
- GB410337A GB410337A GB18439/33A GB1843933A GB410337A GB 410337 A GB410337 A GB 410337A GB 18439/33 A GB18439/33 A GB 18439/33A GB 1843933 A GB1843933 A GB 1843933A GB 410337 A GB410337 A GB 410337A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- emissive surface
- surrounded
- circle
- heating element
- 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
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
- H01J17/06—Cathodes
- H01J17/063—Indirectly heated cathodes, e.g. by the discharge itself
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
410,337. Thermionic cathodes. ELIN AKT.-GES. FUR ELEKTRISCHE INDUSTRIE, 1, Volksgartenstrasse, Vienna. June 28, 1933, No. 18439. Convention date, July 23, 1932. [Class 39 (i).] The emissive surface of a cathode for vapour apparatus is formed by a continuous strip coated on one or both sides with active material which is so arranged that a section taken in a plane perpendicular to the longitudinal axis of the apparatus exhibits a closed linear contour which is made up of successive parts and is capable of being bounded by a circumscribing circle and an inscribed circle and is so constituted that the length of one element from any one point of contact with the inscribed circle up to the next such point is less than double the diameter of the circumscribing circle. The cathode is surrounded by a heat shield. Fig. 4 shows one shape of emissive surface. The heating element 2 may be coated with insulation and surrounded by a protecting tube or left exposed and centred by strips 3 soldered across the ends of the cathode. Fig. 5 shows another shape, based on the involute, for the emissive surface. The cathode may have more than one heating element, or more than one emissive surface may be inserted in a common heatshield.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT410337X | 1932-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB410337A true GB410337A (en) | 1934-05-17 |
Family
ID=3673743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18439/33A Expired GB410337A (en) | 1932-07-23 | 1933-06-28 | Improvements in or relating to vapour apparatus for electric discharges |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB410337A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512538A (en) * | 1949-07-26 | 1950-06-20 | Atomic Energy Commission | Electric discharge device |
| GB2172426A (en) * | 1985-02-06 | 1986-09-17 | New Japan Radio Co Ltd | Cathodes for magnetrons |
-
1933
- 1933-06-28 GB GB18439/33A patent/GB410337A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512538A (en) * | 1949-07-26 | 1950-06-20 | Atomic Energy Commission | Electric discharge device |
| GB2172426A (en) * | 1985-02-06 | 1986-09-17 | New Japan Radio Co Ltd | Cathodes for magnetrons |
| GB2172426B (en) * | 1985-02-06 | 1989-06-14 | New Japan Radio Co Ltd | Cathode for magnetron |
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