GB1112425A - Improvements relating to fluorescent lighting fittings - Google Patents
Improvements relating to fluorescent lighting fittingsInfo
- Publication number
- GB1112425A GB1112425A GB34711/64A GB3471164A GB1112425A GB 1112425 A GB1112425 A GB 1112425A GB 34711/64 A GB34711/64 A GB 34711/64A GB 3471164 A GB3471164 A GB 3471164A GB 1112425 A GB1112425 A GB 1112425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- duct
- interior
- envelope
- metal
- lamp
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
1,112,425. Cooling discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 23 Aug., 1965 [25 Aug., 1964], No. 34711/64. Heading H1D. [Also in Division F4] In a sealable casing consisting of a support member 4, e.g. of sheet metal, and a transparent cover member 5 and enclosing one or more fluorescent discharge lamps 1, 2, a duct 6 extends through but is sealed from the interior of the enclosure and has open ends, one of which in use is higher than the other, a thermal conduction path of solid material being provided between the interior of the duct and a selected portion of the lamp envelope to convey heat from the envelope to the interior of the duct. The cooling reduces the mercury vapour pressure inside the tube to the optimum value for operation. The duct may be of metal, e.g. copper or aluminium, or of plastics material. In the latter case a metallic element in contact with the envelope may project into the duct. The conduction path may consist of resilient metal clips supporting the lamp at the selected point or points, the clips being carried by a collar 11 forming a thickened part of the wall of the duct. Alternatively, when the duct 6 is of metal its outer surface may be in direct contact with the lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34711/64A GB1112425A (en) | 1964-08-25 | 1964-08-25 | Improvements relating to fluorescent lighting fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34711/64A GB1112425A (en) | 1964-08-25 | 1964-08-25 | Improvements relating to fluorescent lighting fittings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1112425A true GB1112425A (en) | 1968-05-08 |
Family
ID=10369027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34711/64A Expired GB1112425A (en) | 1964-08-25 | 1964-08-25 | Improvements relating to fluorescent lighting fittings |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1112425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5934786A (en) * | 1995-09-21 | 1999-08-10 | O'keefe; Donald L. | Sealed lighting unit for clean-rooms and the like |
-
1964
- 1964-08-25 GB GB34711/64A patent/GB1112425A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5934786A (en) * | 1995-09-21 | 1999-08-10 | O'keefe; Donald L. | Sealed lighting unit for clean-rooms and the like |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES471432A1 (en) | High pressure metal vapor discharge lamps | |
| GB1267175A (en) | ||
| GB1371067A (en) | Electric discharge tubes or lamps | |
| GB1506827A (en) | Gas and/or vapour discharge lamp | |
| GB1112425A (en) | Improvements relating to fluorescent lighting fittings | |
| ES446499A1 (en) | Gas-and/or vapor discharge lamp | |
| IT948855B (en) | HIGH PRESSURE DISCHARGE ELECTRIC LAMP IN MERCURY VAPOR WITH ADDITION OF METALLIC HALIDE | |
| ES411788A1 (en) | High-pressure discharge lamp | |
| JPS52146070A (en) | High pressure mercury vapor arc discharge lamp | |
| JPS5336975A (en) | Low pressure mercury vapor discharge tube lamp | |
| JPS52103879A (en) | Metallic vapor discharge lamp | |
| FR2377093A1 (en) | LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP | |
| JPS54115578A (en) | Low pressure mercury vapor discharge lamp | |
| JPS5671269A (en) | Metallic vapor discharge lamp | |
| GB1084500A (en) | A mercury vapour fluorescent lamp | |
| GB854388A (en) | Improvements in or relating to low pressure mercury vapour electric discharge lamps | |
| GB1269368A (en) | Fluorescent discharge lamps | |
| JPS5289279A (en) | Electric device with metal vapor discharge lamp | |
| GB946544A (en) | Improvements in electric discharge lamps | |
| GB1005176A (en) | Improvements in or relating to electric lighting fittings | |
| GB1084471A (en) | Electric discharge lamp and means for supporting an elongated member therein | |
| GB1129865A (en) | Improvements in or relating to low-pressure mercury vapour discharge lamps | |
| GB1141010A (en) | Metal iodide discharge lamps | |
| GB1206375A (en) | Arc tubes | |
| JPS5471886A (en) | Metal vapor discharge lamp |