GB619720A - Improvements in or relating to thermionic electric discharge devices - Google Patents
Improvements in or relating to thermionic electric discharge devicesInfo
- Publication number
- GB619720A GB619720A GB3749946A GB3749946A GB619720A GB 619720 A GB619720 A GB 619720A GB 3749946 A GB3749946 A GB 3749946A GB 3749946 A GB3749946 A GB 3749946A GB 619720 A GB619720 A GB 619720A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- frames
- strips
- cut
- wires
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0026—Machines for manufacture of grids or anodes
Landscapes
- Particle Accelerators (AREA)
Abstract
619,720. Making parts of thermionic valves. M-O VALVE CO., Ltd., and WARREN, G. W. Dec. 20, 1946, No. 37499. [Classes 83 (ii) and 83 (iv)] In a method of making a filament for a thermionic discharge device, wire 3 is wound helically around two metal strips 1, Fig. 1, separated by spacers 2, and is soldered thereto, the wires 5 on one side of the helix are then removed and the members 1 are cut transversely as at 6 to form individual wires 7 soldered to end tags 8. The strips 1 are preferably of nickel coated on one side with copper, and the wire is of tungsten. After the wire is wound, the frame 1, 2 is heated to soften the copper coating and so fix the wire to the strips. By selecting spacers 2 having a greater expansion than the wire, the wire is simultaneously placed under tension and any bends or kinks removed. In a modification, the wire is wound around two superposed rectangular frames 11, Fig. 4. After fixing, the wires along each edge are cut to allow the separation of the two frames. The ends 9 are then cut off and the sides of the frames severed transversely. In either form, the transverse cutting of the strips or frames may occur before the cutting of the wire. If it is desired to give the filament an oxide coating, this may be done before the strips or frames are cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3749946A GB619720A (en) | 1946-12-20 | 1946-12-20 | Improvements in or relating to thermionic electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3749946A GB619720A (en) | 1946-12-20 | 1946-12-20 | Improvements in or relating to thermionic electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB619720A true GB619720A (en) | 1949-03-14 |
Family
ID=10396928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3749946A Expired GB619720A (en) | 1946-12-20 | 1946-12-20 | Improvements in or relating to thermionic electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB619720A (en) |
-
1946
- 1946-12-20 GB GB3749946A patent/GB619720A/en not_active Expired
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