GB502588A - Gas-filled electric incandescent lamp - Google Patents
Gas-filled electric incandescent lampInfo
- Publication number
- GB502588A GB502588A GB11974/38A GB1197438A GB502588A GB 502588 A GB502588 A GB 502588A GB 11974/38 A GB11974/38 A GB 11974/38A GB 1197438 A GB1197438 A GB 1197438A GB 502588 A GB502588 A GB 502588A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blackening
- gas
- lamp bulb
- atmospheres
- filament
- 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
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
- H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
Landscapes
- Resistance Heating (AREA)
Abstract
502,588. Electric incandescent lamps. VEREINIGTE GLUHLAMPEN UND ELEKTRIZITATS AKT.-GES. April 21, 1938, No. 11974. Convention date, April 21, 1937. [Class 39 (ii)] In order to prevent blackening, a lamp bulb of tubular shape, filled with gas at a pressure greater than two atmospheres, has one or more blackening-reducing bodies of tubular form fitted therein along the direction of flow of the gas convection currents so as to oppose as little resistance as possible to the convection currents, a free space being provided above the blackening-reducing body or bodies so that the downwardly directed gas current shall not counteract the ascending current. In the example a gauze of molybdenum wire is coiled into the form of a tube E of spiral cross-section and arranged with its lower end at the level of, or slightly above, the upper end of the filament B, In a modification the blackening-reducing body is in the form of a wire coil surrounding the current lead to one end of the filament, and is supported from the wall of the lamp bulb. Alternatively a tube of nickel or of quartz glass may be used. The lamp bulb A is preferably made of quartz glass and tilled with krypton at a pressure of 50 atmospheres. U.S.A. Specification 1,899,587 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE502588X | 1937-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB502588A true GB502588A (en) | 1939-03-21 |
Family
ID=6545927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11974/38A Expired GB502588A (en) | 1937-04-21 | 1938-04-21 | Gas-filled electric incandescent lamp |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR836159A (en) |
| GB (1) | GB502588A (en) |
-
1938
- 1938-04-04 FR FR836159D patent/FR836159A/en not_active Expired
- 1938-04-21 GB GB11974/38A patent/GB502588A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR836159A (en) | 1939-01-12 |
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