GB273293A - Improvements in or relating to thermionic valves - Google Patents
Improvements in or relating to thermionic valvesInfo
- Publication number
- GB273293A GB273293A GB16378/27A GB1637827A GB273293A GB 273293 A GB273293 A GB 273293A GB 16378/27 A GB16378/27 A GB 16378/27A GB 1637827 A GB1637827 A GB 1637827A GB 273293 A GB273293 A GB 273293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- clamp
- jaws
- burnt
- bulb
- 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
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/18—Supports; Vibration-damping arrangements
Landscapes
- Discharge Lamp (AREA)
Abstract
273,293. Tourne, C. June 22, 1926, [Convention date]. Vacuum tubes. - A valve has a continuous filament of length equal to that of several sections of active filament, and means for replacing a burnt-out or defective section without opening the bulb. As shown, the length of filament not in use is carried by a bobbin 6, and the filament passes through a tubular guide 7 and is secured between a fixed lower clamp 8 with spring jaws, and an upper spring clamp 8<1> sliding in a tube 9, which is screwthreaded to receive a bar 10 of soft iron with guides 11 operating in a slot in the tube. Rotation of the bar by means of an external magnetic field thus causes longitudinal movement of the clamp 8'. A burnt-out section of filament is replaced by causing the clamp 8<1> to move downwards so that it passes over the clamp 8 and its jaws are opened thereby and subsequently closed to grip the filament. The clamp 8<1> is then moved in the reverse direction so as to open the jaws of the lower clamp 8, which close subsequently so as to grip the filament, but less tightly than the clamp 8<1>. The electrode structure is held within the bulb by springs 13. The vacuum may be improved by burning out several sections of filament.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR618030T | 1926-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB273293A true GB273293A (en) | 1927-08-18 |
Family
ID=8982708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16378/27A Expired GB273293A (en) | 1926-06-22 | 1927-06-20 | Improvements in or relating to thermionic valves |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR618030A (en) |
| GB (1) | GB273293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2495618A (en) * | 1947-05-16 | 1950-01-24 | M O Valve Co Ltd | Electrode structure for space discharge tubes |
-
1926
- 1926-06-22 FR FR618030D patent/FR618030A/en not_active Expired
-
1927
- 1927-06-20 GB GB16378/27A patent/GB273293A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2495618A (en) * | 1947-05-16 | 1950-01-24 | M O Valve Co Ltd | Electrode structure for space discharge tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR618030A (en) | 1927-03-02 |
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