GB447074A - Improvements in or relating to electric incandescent lamps - Google Patents
Improvements in or relating to electric incandescent lampsInfo
- Publication number
- GB447074A GB447074A GB33043/34A GB3304334A GB447074A GB 447074 A GB447074 A GB 447074A GB 33043/34 A GB33043/34 A GB 33043/34A GB 3304334 A GB3304334 A GB 3304334A GB 447074 A GB447074 A GB 447074A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- screen
- cap
- extensions
- 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
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
447,074. Electric incandescent lamps with internal screens. LAMPE YVEL AUTO-LAMPE & CIE ANCIENS ETABLISSEMENTS L. LEVY ET A. MONNIER, 11, Rue Torricelli, Paris. Nov. 16, 1934, No. 33043. Convention date, Nov. 17, 1933. [Class 39 (ii)] In order to ensure that the cap is secured correctly relatively to the bulb of an electric lamp provided with at least one filament which is partly surrounded by a screen, the screen 3 is provided with extensions 9 which, as shown, may be disposed on the front portion thereof, so that by optically projecting the screen 3 on to a projection screen the bulb can be adjusted until the extensions 9 are both in the horizontal plane before the cap 1 and bulb 2 are secured together. In the example the bulb is placed in the cap and its internal parts are disposed in a horizontal parallel light beam from a projection lantern. The bulb is then rotated about its longitudinal axis until the shadowgraphs of the two extensions 9 are coincident upon a screen. When in this position the bulb is secured to the cap. The screen co-operates with an auxiliary filament 7 mounted in front of a main filament 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR632369X | 1933-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB447074A true GB447074A (en) | 1936-05-12 |
Family
ID=8992490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33043/34A Expired GB447074A (en) | 1933-11-17 | 1934-11-16 | Improvements in or relating to electric incandescent lamps |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE406227A (en) |
| DE (1) | DE632369C (en) |
| FR (1) | FR777656A (en) |
| GB (1) | GB447074A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19624688A1 (en) * | 1996-06-20 | 1998-01-02 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Shading device for a motor vehicle headlight lamp and manufacturing method for such a shading device |
-
0
- BE BE406227D patent/BE406227A/xx unknown
-
1933
- 1933-11-17 FR FR777656D patent/FR777656A/en not_active Expired
-
1934
- 1934-11-13 DE DEL86943D patent/DE632369C/en not_active Expired
- 1934-11-16 GB GB33043/34A patent/GB447074A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE406227A (en) | |
| FR777656A (en) | 1935-02-26 |
| DE632369C (en) | 1936-07-07 |
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