GB476420A - Improvements in high pressure metal vapour electric discharge lamps - Google Patents
Improvements in high pressure metal vapour electric discharge lampsInfo
- Publication number
- GB476420A GB476420A GB20744/37A GB2074437A GB476420A GB 476420 A GB476420 A GB 476420A GB 20744/37 A GB20744/37 A GB 20744/37A GB 2074437 A GB2074437 A GB 2074437A GB 476420 A GB476420 A GB 476420A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- greatest
- discharge lamps
- high pressure
- electric 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
- H01J61/02—Details
- H01J61/30—Vessels; Containers
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
476,420. Discharge lamps. BRITISH THOMSON - HOUSTON CO., Ltd., and GENERAL ELECTRIC CO., Ltd. July 27, 1937, No. 20744. Convention date, Dec. 1, 1936. [Class 39 (i)] The narrow thick-walled envelope of a highpressure metal-vapour discharge lamp has a bore which is greatest in some plane between the ends of the discharge path and tapers thence towards each end. The pressure is greater than 10, and may reach 50, atmospheres. In the form shown in Fig. 1, adapted for operation with the discharge ends in the same horizontal plane, the upper side 2 of the quartz envelope is bulged, while the bottom side 1 is straight, the transverse cross-section being oval with its vertical diameter greatest in the middle. The ends of the tube carrying the electrodes are inclined downwardly and contain globules of mercury. In a vertical discharge lamp, the cross-section may be circular and greatest in the middle, or, as shown in Fig. 3, at a point above the middle, of the discharge. Specification 449,862 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE476420X | 1936-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB476420A true GB476420A (en) | 1937-12-08 |
Family
ID=6542001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20744/37A Expired GB476420A (en) | 1936-12-01 | 1937-07-27 | Improvements in high pressure metal vapour electric discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2190657A (en) |
| GB (1) | GB476420A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2896107A (en) * | 1957-02-06 | 1959-07-21 | Engelhard Ind Inc | Gaseous electric discharge lamp |
| US3172000A (en) * | 1961-08-31 | 1965-03-02 | Giannini Scient Corp | Gas discharge light source with a recirculating gas supply |
| US3858078A (en) * | 1973-07-09 | 1974-12-31 | Gte Sylvania Inc | Metal halide discharge lamp having an arched arc tube |
| US4482842A (en) * | 1980-10-01 | 1984-11-13 | Hitachi, Ltd. | Curved tube type ultra high pressure mercury arc discharge lamp device |
| US4498027A (en) * | 1982-06-11 | 1985-02-05 | Gte Products Corporation | Arc discharge lamp with improved starting capabilities, improved efficacy and maintenance, and line-of-sight arched arc tube for use therewith |
| US7868551B2 (en) * | 2005-04-14 | 2011-01-11 | Sharp Kabushiki Kaisha | Fluorescent tube having an increasing internal diameter, a method of driving the fluorescent tube, an illuminating device for display device, and a display device having the illuminating device |
-
1937
- 1937-07-27 GB GB20744/37A patent/GB476420A/en not_active Expired
- 1937-11-30 US US177210A patent/US2190657A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2190657A (en) | 1940-02-20 |
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