GB294565A - Improvements in vacuum or gas filled incandescent electric lamps - Google Patents
Improvements in vacuum or gas filled incandescent electric lampsInfo
- Publication number
- GB294565A GB294565A GB14534/28A GB1453428A GB294565A GB 294565 A GB294565 A GB 294565A GB 14534/28 A GB14534/28 A GB 14534/28A GB 1453428 A GB1453428 A GB 1453428A GB 294565 A GB294565 A GB 294565A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vacuum
- gas filled
- electric lamps
- filament
- shapes
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
294,565. Main, G. July 26, 1927, [Convention date]. Reflectors within bulbs.-A reflector 2 is associated with a circularly disposed filament 1 inside the bulb, in such a way as to give a uniform distribution of light over a plane surface. The reflector may be of the shapes shown or of othet shapes, including single conical or like shapes which may be arranged either above or below the filament. That shown in Fig. 7 is arranged for indirect lighting, but it may be inverted above the filament to throw all the light downwards.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR650920T | 1927-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB294565A true GB294565A (en) | 1929-01-17 |
Family
ID=9004257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14534/28A Expired GB294565A (en) | 1927-07-26 | 1928-05-17 | Improvements in vacuum or gas filled incandescent electric lamps |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR650920A (en) |
| GB (1) | GB294565A (en) |
-
1927
- 1927-07-26 FR FR650920D patent/FR650920A/en not_active Expired
-
1928
- 1928-05-17 GB GB14534/28A patent/GB294565A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR650920A (en) | 1929-02-12 |
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