GB318228A - Improvements in electric incandescent lamps, particularly for use in automobile headlamps - Google Patents
Improvements in electric incandescent lamps, particularly for use in automobile headlampsInfo
- Publication number
- GB318228A GB318228A GB16237/29A GB1623729A GB318228A GB 318228 A GB318228 A GB 318228A GB 16237/29 A GB16237/29 A GB 16237/29A GB 1623729 A GB1623729 A GB 1623729A GB 318228 A GB318228 A GB 318228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filaments
- filament
- auxiliary
- normal
- leads
- 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
- 238000005286 illumination Methods 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
318,228. General Motors Research Corporation, (Assignees of Falge, R. N.). Sept. 1, 192'8', [Convention date]. Multiple - filament lamps; filaments.-An incandescent lamp for motor vehicles &c. has normal filaments arranged for alternative illumination and one or more auxiliary filaments in circuit with, and of greater resistance than, the normal filaments to provide illumination on fracture of the latter. Fig. 1 shows one example of a doublebeam lamp mounted in a parabolic reflector 24, the lower part 28 of which is bent from true parabolic form in order that an upper filament 12 may project a downward beam. Filaments 12, 14, the latter situated at the focus, are connected to leads 16, 18 and to a common return 20. An auxiliary filament 22 is connected to the leads 16, 18. In a modification, an auxiliary filament is connected in parallel with each of the normal filaments.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US303443A US1859661A (en) | 1928-09-01 | 1928-09-01 | Three filament bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB318228A true GB318228A (en) | 1930-08-21 |
Family
ID=23172104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16237/29A Expired GB318228A (en) | 1928-09-01 | 1929-05-27 | Improvements in electric incandescent lamps, particularly for use in automobile headlamps |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1859661A (en) |
| DE (1) | DE543588C (en) |
| FR (1) | FR676367A (en) |
| GB (1) | GB318228A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162625A (en) * | 1984-07-31 | 1986-02-05 | Stanley Electric Co Ltd | Headlamp for vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9642227B2 (en) | 2010-06-18 | 2017-05-02 | Thomas & Betts International Llc | Extending service life of lighting fixtures |
-
1928
- 1928-09-01 US US303443A patent/US1859661A/en not_active Expired - Lifetime
-
1929
- 1929-05-22 DE DEG76480D patent/DE543588C/en not_active Expired
- 1929-05-27 GB GB16237/29A patent/GB318228A/en not_active Expired
- 1929-06-07 FR FR676367D patent/FR676367A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162625A (en) * | 1984-07-31 | 1986-02-05 | Stanley Electric Co Ltd | Headlamp for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| US1859661A (en) | 1932-05-24 |
| DE543588C (en) | 1932-02-06 |
| FR676367A (en) | 1930-02-21 |
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