GB457070A - Improvements in or relating to indirectly heated cathodes for electric discharge tubes - Google Patents
Improvements in or relating to indirectly heated cathodes for electric discharge tubesInfo
- Publication number
- GB457070A GB457070A GB28764/35A GB2876435A GB457070A GB 457070 A GB457070 A GB 457070A GB 28764/35 A GB28764/35 A GB 28764/35A GB 2876435 A GB2876435 A GB 2876435A GB 457070 A GB457070 A GB 457070A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electric discharge
- indirectly heated
- rod
- relating
- discharge tubes
- 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
- H01J1/26—Supports for the emissive material
Landscapes
- Soil Working Implements (AREA)
- Fishing Rods (AREA)
Abstract
457,070. Thermionic cathodes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Oct. 17, 1935, No. 28764. Convention date, Jan. 11. [Class 39 (i)] An indirectly heated cathode for an electric discharge tube has a tubular cathode body 1 which is pressed together at one only of its ends for part of its length by squeezing, hammering or the like, preferably about a rod-shaped part 3, to provide a means whereby it may be centred. In the form shown the cathode body is squeezed together on three sides so as to form ridges 2, Fig. 2, the rod 3 then acting as a centring member. In a modification, the end of the cathode itself may be pressed into the shape of a rod. Specification 443,535 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE457070X | 1935-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB457070A true GB457070A (en) | 1936-11-20 |
Family
ID=6539259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28764/35A Expired GB457070A (en) | 1935-01-11 | 1935-10-17 | Improvements in or relating to indirectly heated cathodes for electric discharge tubes |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE413114A (en) |
| FR (1) | FR800344A (en) |
| GB (1) | GB457070A (en) |
| NL (1) | NL44138C (en) |
-
0
- BE BE413114D patent/BE413114A/xx unknown
- NL NL44138D patent/NL44138C/xx active
-
1935
- 1935-10-17 GB GB28764/35A patent/GB457070A/en not_active Expired
-
1936
- 1936-01-03 FR FR800344D patent/FR800344A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE413114A (en) | |
| FR800344A (en) | 1936-07-02 |
| NL44138C (en) |
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