GB1279246A - Improvements relating to road vehicle indicating lamp circuits - Google Patents
Improvements relating to road vehicle indicating lamp circuitsInfo
- Publication number
- GB1279246A GB1279246A GB4387168A GB4387168A GB1279246A GB 1279246 A GB1279246 A GB 1279246A GB 4387168 A GB4387168 A GB 4387168A GB 4387168 A GB4387168 A GB 4387168A GB 1279246 A GB1279246 A GB 1279246A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- relay
- lamp circuit
- lamps
- resistance
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/2603—Attenuation of the light according to ambient luminiosity, e.g. for braking or direction indicating lamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Audible And Visible Signals (AREA)
Abstract
1279246 Road traffic signals on vehicles FLEXIBLE LAMPS Ltd 16 Dec 1969 [16 Sept 1968] 43871/68 Heading G4Q A road vehicle electric indicating lamp circuit includes a thermal relay connected in the indicating lamp circuit and arranged to receive transmitted heat generated by a flow of current in a road lamp circuit separate from the indicating lamp circuit, the thermal relay being operated automatically by the transmitted heat when the road lamp circuit is switched on, and being connected in the indicating lamp circuit in such a way as to reduce the current flow through the indicating lamps, and hence to reduce their brightness, when so operated by the switching on of the road lamp circuit. In the illustrated embodiment, the brightness control circuit for the stop lamp circuit comprises a bimetallic thermal relay 10A mounted in a side or tail lamp housing 11A close to the lamp bulb 12A so that thermal radiation from the lamp filament will fall directly on the relay 10A and actuate it within a short period of the switching on of the lamp. The relay 10A which is normally closed is connected in parallel with a resistance 14A in the live line 16 of the associated stop lamp circuit. When the side and tail lamps are switched on, the relay 10A is opened and the resistance 14A brought into the stop lamp circuit so that the current flow through the stop lamp bulbs 18 is reduced. The flashing direction indicator lamp circuit comprises a pair of rear indicator lamps 20, a selector switch 21 and a flasher unit 23. A brightness control circuit comprises a resistance 14B across which a thermal relay 10B is connected in parallel. In this case, the relay 10B is mounted close to a resistance heating element 25 connected in parallel across a side or tail lamp bulb 12B. When the side and tail lamps are switched on, the heat generated by the element 25 will immediately open the relay 10B and bring the resistance 14B into series with a selected rear indicator lamp 20. The relay 10B and element 25 do not need to be mounted in the casing of a side or tail lamp, and they may be mounted adjacent one another in any convenient position. This invention enables the brightness of the stop and/or indicator lamps of a trailer to be controlled by means provided in the towing vehicle without the need for providing further electrical connections between the trailer and towing vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4387168A GB1279246A (en) | 1968-09-16 | 1968-09-16 | Improvements relating to road vehicle indicating lamp circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4387168A GB1279246A (en) | 1968-09-16 | 1968-09-16 | Improvements relating to road vehicle indicating lamp circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1279246A true GB1279246A (en) | 1972-06-28 |
Family
ID=10430698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4387168A Expired GB1279246A (en) | 1968-09-16 | 1968-09-16 | Improvements relating to road vehicle indicating lamp circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1279246A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109941186A (en) * | 2019-03-28 | 2019-06-28 | 江苏沁恒股份有限公司 | Automobile tail light display system and method |
-
1968
- 1968-09-16 GB GB4387168A patent/GB1279246A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109941186A (en) * | 2019-03-28 | 2019-06-28 | 江苏沁恒股份有限公司 | Automobile tail light display system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |