GB237919A - Improvements in and relating to valves for wireless telegraphy and telephony - Google Patents
Improvements in and relating to valves for wireless telegraphy and telephonyInfo
- Publication number
- GB237919A GB237919A GB19440/25A GB1944025A GB237919A GB 237919 A GB237919 A GB 237919A GB 19440/25 A GB19440/25 A GB 19440/25A GB 1944025 A GB1944025 A GB 1944025A GB 237919 A GB237919 A GB 237919A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- filament
- plugs
- supplied
- valves
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 abstract 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 229910052776 Thorium Inorganic materials 0.000 abstract 1
- 239000013543 active substance Substances 0.000 abstract 1
- 229910052788 barium Inorganic materials 0.000 abstract 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052712 strontium Inorganic materials 0.000 abstract 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
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
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Solid Thermionic Cathode (AREA)
- Cold Cathode And The Manufacture (AREA)
- Electron Sources, Ion Sources (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Discharge Lamp (AREA)
Abstract
237,919. Hawadier, J. A. M., and Soc. Franþaise de Lampes Ó Incandescence Luxor. Aug. 2, 1924, [Convention date]. Vacuum tubes.-In thermionic valves for wireless signalling of the type comprising a tubular cathode heated by an independent auxiliary filament passing therethrough, the cathode comprises a tube b of quartz or other refractory, insulating, homogenous material carrying on its outer surface a tungsten or molybdenum tube a covered with, or having incorporated therewith, thermionically active substances such as oxides of calcium, barium, strontium or thorium or mixture thereof, the tube b being held central about the heating filament d, and its end closed to confine heat and electrons from the filament d, by plugs f inserted in the ends of the tube b. The plugs f may be of nickel compressed around the filament leads e, e'. The filament d may be straight or helical and may be supplied with alternating current. The tube a is supplied with a lead c and is closely surrounded by a grid g and anode h.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR597125T | 1924-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB237919A true GB237919A (en) | 1926-06-03 |
Family
ID=8968056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19440/25A Expired GB237919A (en) | 1924-08-02 | 1925-07-31 | Improvements in and relating to valves for wireless telegraphy and telephony |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1666010A (en) |
| FR (1) | FR597125A (en) |
| GB (1) | GB237919A (en) |
| NL (1) | NL16615C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE738989C (en) * | 1933-10-31 | 1943-09-08 | Opta Radio Ag | Indirectly heated cathode for amplifier tubes made by the metal vapor process |
| US3046444A (en) * | 1959-04-28 | 1962-07-24 | Raytheon Co | Magnetrons |
| DE1130934B (en) * | 1959-10-02 | 1962-06-07 | Philips Nv | Indirectly heated cathode with low heating current output |
-
0
- NL NL16615D patent/NL16615C/xx active
-
1924
- 1924-08-02 FR FR597125D patent/FR597125A/en not_active Expired
-
1925
- 1925-07-13 US US43259A patent/US1666010A/en not_active Expired - Lifetime
- 1925-07-31 GB GB19440/25A patent/GB237919A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR597125A (en) | 1925-11-13 |
| US1666010A (en) | 1928-04-10 |
| NL16615C (en) |
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