GB751061A - Improvements in or relating to the manufacture of electronic tubes - Google Patents
Improvements in or relating to the manufacture of electronic tubesInfo
- Publication number
- GB751061A GB751061A GB19247/54A GB1924754A GB751061A GB 751061 A GB751061 A GB 751061A GB 19247/54 A GB19247/54 A GB 19247/54A GB 1924754 A GB1924754 A GB 1924754A GB 751061 A GB751061 A GB 751061A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- tool
- grid
- walls
- spread
- 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
- H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
-
- 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
- H01J2893/0002—Construction arrangements of electrode systems
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
751,061. Thermionic-cathode tubes. SYLVANIA ELECTRIC PRODUCTS, Inc. June 30, 1954 [July 10, 1953], No. 19247/54. Class 39 (1). A hollow electrode such as a cathode 12 and a surrounding electrode such as a grid 14 are mounted between insulating wafers, and the cathode walls then spread towards the grid, so that the adjustment to a small critical interelectrode spacing is deferred until after assembly. The spreading is performed by a tool 42 having the general section shown in Fig. 7, i.e. two flat sides 46 with rounded ends 48. This is slid within the cathode and then rotated, so that the walls of the cathode are bowed outwards. The tool may be mounted in a wider cylindrical portion 40 having a locating shoulder 56, so that the tool penetrates a fixed depth into the cathode. Cut-away portions 52, 54 ensure that only the central section of the cathode, between the insulating wafers, is spread. The tool may be mounted in a handle 34 having a flat portion 50 to indicate to the operator by touch the orientation of the tool.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US751061XA | 1953-07-10 | 1953-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB751061A true GB751061A (en) | 1956-06-27 |
Family
ID=22123576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19247/54A Expired GB751061A (en) | 1953-07-10 | 1954-06-30 | Improvements in or relating to the manufacture of electronic tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB751061A (en) |
-
1954
- 1954-06-30 GB GB19247/54A patent/GB751061A/en not_active Expired
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