GB318933A - - Google Patents
Info
- Publication number
- GB318933A GB318933A GB27746/29A GB2774629A GB318933A GB 318933 A GB318933 A GB 318933A GB 27746/29 A GB27746/29 A GB 27746/29A GB 2774629 A GB2774629 A GB 2774629A GB 318933 A GB318933 A GB 318933A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- supports
- loop
- stem
- secured
- 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
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/18—Supports; Vibration-damping arrangements
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
318,933. British Thomson-Houston Co., Ltd., (Assignees of Relyea, W. I.). Sept. 12, 1928, [Convention date]. Vacuum tubes. - A filament 5, Figs. 2 and 3, for a valve or incandescent lamp is maintained in tension by two supports 12 on either side of the filament, a member 14, preferably U - shaped, spanning the supports, and springs 13 held under compression and arranged between the member 14 and the supports, and preferably mounted in recesses in the supports. A twisted, stranded member 15 of molybdenum is wound tightly around the member 14, and ends in a loop 25 supporting the loop of the filament. A helix 16, of tungsten or other refractory metal, wound around the filament or the loop 25, prevents. welding action at the place of contact between the filament and loop. The ends of the filament are secured to leads 4 mounted in a stem 2, on which is fitted a slotted cylindrical cap having a perforated plate 9 carrying the supports 12. A sheet of copper mesh may be interposed between the stem and the cap, and the cap is secured around the stem by clamps 17. A quartz spacer 7 with staggered wires may be mounted between the leads 4. A cylindrical anode, not shown, is carried by rods 22, Fig. 4, fixed to a slotted member 19 which is closed by a perforated plate 20. The anode lead 23 passes through and is secured to the plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US305499A US1756882A (en) | 1928-09-12 | 1928-09-12 | Filament-tensioning means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB318933A true GB318933A (en) | 1930-12-11 |
Family
ID=23181051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27746/29A Expired GB318933A (en) | 1928-09-12 | 1929-09-12 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1756882A (en) |
| FR (1) | FR681436A (en) |
| GB (1) | GB318933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7705526B2 (en) | 2005-02-18 | 2010-04-27 | Lg Electronics Inc. | Lamp with twisted filament structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2431139A (en) * | 1943-06-23 | 1947-11-18 | Westinghouse Electric Corp | Magnetron |
-
1928
- 1928-09-12 US US305499A patent/US1756882A/en not_active Expired - Lifetime
-
1929
- 1929-09-07 FR FR681436D patent/FR681436A/en not_active Expired
- 1929-09-12 GB GB27746/29A patent/GB318933A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7705526B2 (en) | 2005-02-18 | 2010-04-27 | Lg Electronics Inc. | Lamp with twisted filament structure |
Also Published As
| Publication number | Publication date |
|---|---|
| US1756882A (en) | 1930-04-29 |
| FR681436A (en) | 1930-05-14 |
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