GB409613A - Improvements in and relating to electron discharge tubes and incandescent electric lamps - Google Patents
Improvements in and relating to electron discharge tubes and incandescent electric lampsInfo
- Publication number
- GB409613A GB409613A GB32643/33A GB3264333A GB409613A GB 409613 A GB409613 A GB 409613A GB 32643/33 A GB32643/33 A GB 32643/33A GB 3264333 A GB3264333 A GB 3264333A GB 409613 A GB409613 A GB 409613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- gauze
- filaments
- relating
- rolled
- 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
- H01J19/38—Control electrodes, e.g. grid
-
- 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
- H01J2893/0015—Non-sealed electrodes
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Resistance Heating (AREA)
Abstract
409,613. Filaments for electric incandescent lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Nov. 22, 1933, No. 32643. Convention date, March 22. Drawings to Specification. [Class 39 (ii).] Wire structures such as filaments of zig-zag or coiled form for electric incandescent lamps are constructed of wire gauze the wires of which are of different materials. The gauze is bent into the required shape and some of the wires are removed by chemical action, such as solution in inorganic acids. The gauze may be rolled to increase its rigidity. In the example given the gauze is of tungsten or molybdenum of 100 microns diameter or less interwoven with iron wires and rolled. After bending to the required shape the iron wires are dissolved out in hydrochloric acid. Brass wires may be used. Some of the soluble wires may be replaced by chemically resistant wires to provide supports.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL409613X | 1933-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB409613A true GB409613A (en) | 1934-05-03 |
Family
ID=19785968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32643/33A Expired GB409613A (en) | 1933-03-22 | 1933-11-22 | Improvements in and relating to electron discharge tubes and incandescent electric lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB409613A (en) |
-
1933
- 1933-11-22 GB GB32643/33A patent/GB409613A/en not_active Expired
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