GB300613A - Improvements in vacuum electric tube devices - Google Patents
Improvements in vacuum electric tube devicesInfo
- Publication number
- GB300613A GB300613A GB33382/28A GB3338228A GB300613A GB 300613 A GB300613 A GB 300613A GB 33382/28 A GB33382/28 A GB 33382/28A GB 3338228 A GB3338228 A GB 3338228A GB 300613 A GB300613 A GB 300613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- closed loop
- filament
- cathode
- electric tube
- 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)
Abstract
300,613. Westinghouse Lamp Co., (Assignees of Lederer, E. A., and Marden, J. W.). Nov. 16,1927, [Convention date]. Vacuum tubes.-Equipotential cathodes are constructed with a closed loop circuit to enable them to be heated bv high-frequency currents induced from an independent source, independently of the anode or other electrode, to effect the conversion of a carbonate into an oxide coating. The closed loop is. formed with the cathode by upper and lower supporting strips 20 and a support rod 19 to which they are welded. Mica or metal discs 16, 17 serve to prevent a flow of electrons to the grid 13 and the anode 1.4 from the exposed ends 43, 44 of the heating filament. The bight ,of the filament may be supported by a resilient member 28, or its two limbs may be threaded into perforations through an insulating block fitted into the cathode tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US233537A US1945746A (en) | 1927-11-16 | 1927-11-16 | Electron discharge device with indirectly heated cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB300613A true GB300613A (en) | 1929-06-20 |
Family
ID=22877646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33382/28A Expired GB300613A (en) | 1927-11-16 | 1928-11-14 | Improvements in vacuum electric tube devices |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US1945746A (en) |
| GB (1) | GB300613A (en) |
| NL (1) | NL24661C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3191089A (en) * | 1965-06-22 | Thermionic valve cathode | ||
| NL68498C (en) * | 1948-03-15 | |||
| US2909699A (en) * | 1957-12-05 | 1959-10-20 | Sylvania Electric Prod | Electron discharge device |
-
0
- NL NL24661D patent/NL24661C/xx active
- US US19870D patent/USRE19870E/en not_active Expired
-
1927
- 1927-11-16 US US233537A patent/US1945746A/en not_active Expired - Lifetime
-
1928
- 1928-11-14 GB GB33382/28A patent/GB300613A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL24661C (en) | |
| USRE19870E (en) | 1936-02-25 |
| US1945746A (en) | 1934-02-06 |
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