GB720130A - Improvements in or relating to electric incandescent lamps - Google Patents
Improvements in or relating to electric incandescent lampsInfo
- Publication number
- GB720130A GB720130A GB24827/52A GB2482752A GB720130A GB 720130 A GB720130 A GB 720130A GB 24827/52 A GB24827/52 A GB 24827/52A GB 2482752 A GB2482752 A GB 2482752A GB 720130 A GB720130 A GB 720130A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filaments
- filament
- lamp
- electric incandescent
- wire
- 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
720,130. Electric incandescent lamps. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 3, 1952 [Oct. 6, 1951], No. 24827/52. Class 39 (2) In an electric incandescent lamp for use, for example, in a motor vehicle headlight, and comprising two coiled filaments, e.g. main and auxiliary filaments, 3, 7 arranged end to end along or parallel with the axis of the lamp and each with an end secured to a common terminal wire 6, the coils of the two filaments are wound in opposite directions so that the filament ends, 5 and 8 respectively, secured to the common terminal wire extend along a tangential plane common to the two filaments. In the example, the auxiliary filament 3 is associated with, and has one end connected to, a concave screen 2 supported solely by a leading-in wire 2a, and the main filament 7 has one end connected to a leading-in and supporting wire 9. As shown, the filaments are arranged coaxially with the lamp. Alternatively, the filament 7 may be coaxial with the lamp and the filament 3 displaced slightly from the axis in a direction away from the screen 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP6288D DE887843C (en) | 1951-10-06 | 1951-10-06 | Electric light bulb with two filament wires, especially for car headlights |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB720130A true GB720130A (en) | 1954-12-15 |
Family
ID=40622216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24827/52A Expired GB720130A (en) | 1951-10-06 | 1952-10-03 | Improvements in or relating to electric incandescent lamps |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2733377A (en) |
| BE (1) | BE514629A (en) |
| CH (1) | CH304864A (en) |
| DE (1) | DE887843C (en) |
| FR (1) | FR1073958A (en) |
| GB (1) | GB720130A (en) |
| NL (2) | NL89412C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3156843A (en) * | 1960-10-27 | 1964-11-10 | Sylvania Electric Prod | Incandescent lamp mount |
| US3548244A (en) * | 1968-07-01 | 1970-12-15 | British Lighting Ind Ltd | Lamp having twin filaments and integral filament legs mounted in a bridge |
| DE10219729A1 (en) * | 2002-05-02 | 2003-11-13 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Light bulb for automotive headlights |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2084750A (en) * | 1935-01-29 | 1937-06-22 | Edison Inc Thomas A | Gaseous discharge system |
| LU28218A1 (en) * | 1946-11-27 | |||
| NL72673C (en) * | 1949-04-13 |
-
0
- NL NLAANVRAGE7709731,A patent/NL172909B/en unknown
- US US2733377D patent/US2733377A/en not_active Expired - Lifetime
- BE BE514629D patent/BE514629A/xx unknown
-
1951
- 1951-10-06 DE DEP6288D patent/DE887843C/en not_active Expired
-
1952
- 1952-10-03 NL NL172909A patent/NL89412C/xx active
- 1952-10-03 GB GB24827/52A patent/GB720130A/en not_active Expired
- 1952-10-03 FR FR1073958D patent/FR1073958A/en not_active Expired
- 1952-10-04 CH CH304864D patent/CH304864A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL172909B (en) | |
| DE887843C (en) | 1953-08-27 |
| FR1073958A (en) | 1954-09-30 |
| US2733377A (en) | 1956-01-31 |
| NL89412C (en) | 1958-06-16 |
| BE514629A (en) | |
| CH304864A (en) | 1955-01-31 |
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