GB292913A - Indirectly heated thermionic cathode - Google Patents
Indirectly heated thermionic cathodeInfo
- Publication number
- GB292913A GB292913A GB17540/28A GB1754028A GB292913A GB 292913 A GB292913 A GB 292913A GB 17540/28 A GB17540/28 A GB 17540/28A GB 1754028 A GB1754028 A GB 1754028A GB 292913 A GB292913 A GB 292913A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- heated
- filament
- current
- cylinders
- 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
Landscapes
- Discharge Lamp (AREA)
- Electron Sources, Ion Sources (AREA)
- Solid Thermionic Cathode (AREA)
- Measuring Fluid Pressure (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
292,913. Loewe, S. June 25, 1927, [Convention date]. Vacuum tubes.-A cathode is heated from the end by conduction from an indirectly-heated body such as a cylinder. As shown in Fig. 2, the cathode 2 is connected at each end with cylinders 4 heated by radiation and electron bombardment from an internal filament 8; or a single cylinder mav be connected to one end of the cathode. If alternating current is supplied to the cylinders 4 the rectified current may be used for the supply to one or more anodes and to the filament of one stage of an amplifier system. Mica shields 6 may be interposed to prevent electrons from passing from the filament 8 to the grid 2 and anode 3. In a modification the ends of the cathode are formed as helices heated by an internal filament. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the arrangement shown in Fig. 4 (Cancelled), in which extensions 8, 9 of the cathode 1 are heated by passage of current, and the resistances of the connections 13, 14 to one supply lead 10 are made of such value that no current passes through the filament. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL69010D DE584068C (en) | 1927-06-25 | 1927-06-25 | Indirectly heated cathode |
| DE292913X | 1927-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB292913A true GB292913A (en) | 1929-06-20 |
Family
ID=25780058
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9966/29A Expired GB308823A (en) | 1927-06-25 | 1928-06-18 | Indirectly heated thermionic cathode |
| GB17540/28A Expired GB292913A (en) | 1927-06-25 | 1928-06-18 | Indirectly heated thermionic cathode |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9966/29A Expired GB308823A (en) | 1927-06-25 | 1928-06-18 | Indirectly heated thermionic cathode |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1939997A (en) |
| AT (1) | AT124871B (en) |
| DE (1) | DE584068C (en) |
| FR (1) | FR656047A (en) |
| GB (2) | GB308823A (en) |
| NL (1) | NL25429C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL110237C (en) * | 1951-06-10 |
-
0
- NL NL25429D patent/NL25429C/xx active
-
1927
- 1927-06-25 DE DEL69010D patent/DE584068C/en not_active Expired
-
1928
- 1928-06-11 AT AT124871D patent/AT124871B/en active
- 1928-06-18 FR FR656047D patent/FR656047A/en not_active Expired
- 1928-06-18 GB GB9966/29A patent/GB308823A/en not_active Expired
- 1928-06-18 GB GB17540/28A patent/GB292913A/en not_active Expired
- 1928-06-23 US US287812A patent/US1939997A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR656047A (en) | 1929-04-26 |
| AT124871B (en) | 1931-10-10 |
| GB308823A (en) | 1929-09-12 |
| DE584068C (en) | 1933-09-14 |
| NL25429C (en) | |
| US1939997A (en) | 1933-12-19 |
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