GB806474A - Electric lamp bulbs for road vehicle lamps - Google Patents
Electric lamp bulbs for road vehicle lampsInfo
- Publication number
- GB806474A GB806474A GB1628955A GB1628955A GB806474A GB 806474 A GB806474 A GB 806474A GB 1628955 A GB1628955 A GB 1628955A GB 1628955 A GB1628955 A GB 1628955A GB 806474 A GB806474 A GB 806474A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- filament
- lamp
- piece
- pair
- 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
- H01K1/00—Details
- H01K1/62—One or more circuit elements structurally associated with the lamp
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
806,474. Electric incandescent lamps. LUCAS (INDUSTRIES), Ltd., J. June 4, 1956 [June 7, 1955], No. 16289/55. Class 39(2) In order to dip the beam of light emitted by a road vehicle lamp comprising a lamp bulb associated with a reflector, the filament e is resiliently supported within the bulb, and magnetizable means are provided for moving the filament to an alternative position within the bulb. As shown, a pair of current-conducting wires b arranged parallel with each other are looped over at their ends within the bulb and secured by an intermediate insulating bridge member c to a pair of filament-supporting wires d, and another pair of wires f extending rearwardly and downwardly from the bridge c carry a piece of soft iron g between them at their outer ends. Another piece of soft iron h is embedded in an insulating plug a within the lamp cap. Magnetization of the iron parts may be effected by passing a current through a coil i surrounding the usual bulb holder. The filament normally occupies a position relative to the focus of the reflector j such that a horizontal beam is emitted by the lamp. To dip the beam the coil i is energized through a switch operable by the driver, whereby the magnetic attraction set up between the iron pieces in the bulb causes the movable piece g to move towards the fixed piece h, thereby moving the filament to the dipped-beam position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1628955A GB806474A (en) | 1955-06-07 | 1955-06-07 | Electric lamp bulbs for road vehicle lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1628955A GB806474A (en) | 1955-06-07 | 1955-06-07 | Electric lamp bulbs for road vehicle lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB806474A true GB806474A (en) | 1958-12-23 |
Family
ID=10074634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1628955A Expired GB806474A (en) | 1955-06-07 | 1955-06-07 | Electric lamp bulbs for road vehicle lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB806474A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1168562B (en) * | 1960-06-07 | 1964-04-23 | Takao Mineta | Incandescent lamp with inner reflector and a filament that can be changed in its position opposite the reflector by means of a ring magnet acting on the incandescent lamp from outside |
| US3237053A (en) * | 1964-02-21 | 1966-02-22 | Robert J Kyp | Electric light bulb with oscillating filament |
-
1955
- 1955-06-07 GB GB1628955A patent/GB806474A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1168562B (en) * | 1960-06-07 | 1964-04-23 | Takao Mineta | Incandescent lamp with inner reflector and a filament that can be changed in its position opposite the reflector by means of a ring magnet acting on the incandescent lamp from outside |
| US3237053A (en) * | 1964-02-21 | 1966-02-22 | Robert J Kyp | Electric light bulb with oscillating filament |
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