GB477747A - Improved device comprising a high-pressure metal-vapour discharge tube - Google Patents
Improved device comprising a high-pressure metal-vapour discharge tubeInfo
- Publication number
- GB477747A GB477747A GB11444/37A GB1144437A GB477747A GB 477747 A GB477747 A GB 477747A GB 11444/37 A GB11444/37 A GB 11444/37A GB 1144437 A GB1144437 A GB 1144437A GB 477747 A GB477747 A GB 477747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- discharge tube
- pressure metal
- april
- vapour discharge
- 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
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
477,747. Supply systems for discharge and incandescent lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. April 21, 1937, No. 11444. Convention date, April 24, 1936. Drawings to Specification. [Class 38 (iv)] [Also in Group XL] Resistance control.-A device comprises a high-pressure metal-vapour discharge tube, an incandescent filament and a resistance having a high negative temperature coefficient, all in series. The resistance compensates the low initial voltage of the discharge tube and maintains the voltage across the filament substantially constant. The resistance may be a sintered silicon-ceramic mixture of the kind described in Specification 442,348, [Group XXXVI]. A heating resistance may be connected in parallel with the main resistance, being, for example, wound round it. Initial and final voltages and currents in an example are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE477747X | 1936-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB477747A true GB477747A (en) | 1938-01-05 |
Family
ID=6542154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11444/37A Expired GB477747A (en) | 1936-04-24 | 1937-04-21 | Improved device comprising a high-pressure metal-vapour discharge tube |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2177695A (en) |
| BE (1) | BE421199A (en) |
| FR (1) | FR820948A (en) |
| GB (1) | GB477747A (en) |
| NL (1) | NL46550C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2668930A (en) * | 1950-10-18 | 1954-02-09 | Gen Electric | Protective system |
| US2723366A (en) * | 1950-11-13 | 1955-11-08 | Gen Electric | Starting and operating circuit for high pressure gaseous discharge device |
-
0
- BE BE421199D patent/BE421199A/xx unknown
- NL NL46550D patent/NL46550C/xx active
-
1937
- 1937-04-12 US US136447A patent/US2177695A/en not_active Expired - Lifetime
- 1937-04-21 GB GB11444/37A patent/GB477747A/en not_active Expired
- 1937-04-22 FR FR820948D patent/FR820948A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR820948A (en) | 1937-11-22 |
| US2177695A (en) | 1939-10-31 |
| NL46550C (en) | |
| BE421199A (en) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2683241A (en) | Electric lamp circuits | |
| GB477747A (en) | Improved device comprising a high-pressure metal-vapour discharge tube | |
| GB467078A (en) | Improvements in or relating to electric discharge tubes formed of quartz | |
| GB1208509A (en) | Circuit for a fluorescent lamp | |
| GB511199A (en) | Improvements in sources of light comprising a high-pressure mercury vapour electric discharge and an incandescent filament in series with it | |
| GB435447A (en) | Potential-steadying device making use of glow lamps | |
| US2963623A (en) | Starting and operating circuits for electrical discharge lamps | |
| GB521498A (en) | Device for operating high-pressure metal-vapour electric discharge lamps having thermionic electrodes | |
| GB757080A (en) | Improvements in and relating to operating circuits for electric discharge lamps | |
| GB489591A (en) | Improvements in combinations of electric discharge lamps and electric incandescent lamps | |
| GB493706A (en) | Improvements relating to high-pressure electrical discharge tubes | |
| GB549992A (en) | Improvements in or relating to incandescent cathodes for use in gas or vapour filled discharge tubes | |
| GB518016A (en) | Improvements in or relating to gasfilled electric incandescent lamps | |
| GB1017009A (en) | Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps | |
| GB422263A (en) | Improvements in electrical resistors | |
| GB635304A (en) | Non-stroboscopic discharge lamp units | |
| GB419866A (en) | Improvements in gasfilled electric discharge tubes | |
| GB936631A (en) | A supply system for fluorescent lamps | |
| GB482991A (en) | Improvements in or relating to devices comprising high-pressure metal-vapour discharge tubes | |
| GB401903A (en) | Improved arrangement for the feeding of current to gaseous discharge luminous tubes | |
| GB427293A (en) | Improvements in or relating to electric discharge tubes | |
| GB780964A (en) | Improvements in or relating to supply equipment for low pressure electric discharge lamps | |
| GB484633A (en) | Improvements in protective devices for electric incandescent lamps | |
| GB443910A (en) | Improvements in or relating to electric discharge devices | |
| GB411692A (en) | Improvements in and relating to lighting installations |