GB276783A - Improvements in or relating to thermionic valves - Google Patents
Improvements in or relating to thermionic valvesInfo
- Publication number
- GB276783A GB276783A GB1723126A GB1723126A GB276783A GB 276783 A GB276783 A GB 276783A GB 1723126 A GB1723126 A GB 1723126A GB 1723126 A GB1723126 A GB 1723126A GB 276783 A GB276783 A GB 276783A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- mandrel
- grid
- support
- former
- 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
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
-
- 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
- H01J2893/0019—Chemical composition and manufacture
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
276,783. M-O Valve Co., Ltd., and Hall, T, r. B. July 9, 1926. Vacuum tubes.-Grid electrodes for thermionic valves are made by winding the grid wire upon a mandrel and forming the turns of the wire to the required shape simultaneously around a grid support and a former smaller than the mandrel. Wire may be helically wound simultaneously about a mandrel and a support wire as described in Specification 283,084 and the turns may be electrically welded to the support wire. A former 5, Fig. 2, may be threaded through the grid wire 2 parallel to the support wire 1 after removal of the mandrel and the wire formed by jaws 6 to embrace the whole of the periphery of the wire 1 with overlapping indentations forming a neck 7, Fig. 3, adjacent the wire 1. The wire 2 may be electrically welded to the sides of the wire 1 at 8, 9. When the wire 1 is of nickel or other relatively soft metal and the wire 2 of harder metal such as molybdenum, the mandrel may be on the smaller side so that the jaws 6 tend to stretch the wire 2 and press it into the wire 1. The grid may be of flattened or circular form with one or more support wires. With the wires 1, 2 of diameter 0.4 mm. and 0.175 mm., the diameter of the mandrel and former may be 1.3 and one mm. respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1723126A GB276783A (en) | 1926-07-09 | 1926-07-09 | Improvements in or relating to thermionic valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1723126A GB276783A (en) | 1926-07-09 | 1926-07-09 | Improvements in or relating to thermionic valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB276783A true GB276783A (en) | 1927-09-08 |
Family
ID=10091531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1723126A Expired GB276783A (en) | 1926-07-09 | 1926-07-09 | Improvements in or relating to thermionic valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB276783A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1039651B (en) * | 1955-11-02 | 1958-09-25 | Sylvania Electric Prod | Machine for the production of grilles for electric discharge tubes |
-
1926
- 1926-07-09 GB GB1723126A patent/GB276783A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1039651B (en) * | 1955-11-02 | 1958-09-25 | Sylvania Electric Prod | Machine for the production of grilles for electric discharge tubes |
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