GB1115991A - Improvements in and relating to lighting control apparatus - Google Patents

Improvements in and relating to lighting control apparatus

Info

Publication number
GB1115991A
GB1115991A GB582265A GB582265A GB1115991A GB 1115991 A GB1115991 A GB 1115991A GB 582265 A GB582265 A GB 582265A GB 582265 A GB582265 A GB 582265A GB 1115991 A GB1115991 A GB 1115991A
Authority
GB
United Kingdom
Prior art keywords
light
resistor
relay
transistor
trigger
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
Application number
GB582265A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAVID JEFFREY DALTON BROWN
Original Assignee
DAVID JEFFREY DALTON BROWN
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DAVID JEFFREY DALTON BROWN filed Critical DAVID JEFFREY DALTON BROWN
Priority to GB582265A priority Critical patent/GB1115991A/en
Publication of GB1115991A publication Critical patent/GB1115991A/en
Expired legal-status Critical Current

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
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/42—Indexing codes relating to other road users or special conditions oncoming vehicle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1,115,991. Transistor delayed switching circuits. J. HAYES, and D. J. D. BROWN. 9 Feb., 1966 [10 Feb., 1965], No. 5822/65. Heading H3T. [Also in Division G1] Vehicle lighting control apparatus has a photo-electric cell responsive to light and a trigger operated thereby including feedback means such that the light level at which the trigger means changes state is greater for increasing light levels than for decreasing light levels. The light-sensitive cell is a cadmium sulphide resistor 1 and is connected to a twostage transistor amplifier, the second transistor 5 having as its collector load a relay coil (13, Fig. 1, not shown) or (as shown in Fig. 2) a resistor 16 forming part of a transistor driver stage for relay 13. A capacitor 11 causes a delay between reception of light by the resistor 1 and actuation of the relay. The release level for the relay is much lower than the trigger level due to the presence of resistor 12 which introduces voltage feedback.
GB582265A 1965-02-10 1965-02-10 Improvements in and relating to lighting control apparatus Expired GB1115991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB582265A GB1115991A (en) 1965-02-10 1965-02-10 Improvements in and relating to lighting control apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB582265A GB1115991A (en) 1965-02-10 1965-02-10 Improvements in and relating to lighting control apparatus

Publications (1)

Publication Number Publication Date
GB1115991A true GB1115991A (en) 1968-06-06

Family

ID=9803250

Family Applications (1)

Application Number Title Priority Date Filing Date
GB582265A Expired GB1115991A (en) 1965-02-10 1965-02-10 Improvements in and relating to lighting control apparatus

Country Status (1)

Country Link
GB (1) GB1115991A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001394A1 (en) * 1980-01-16 1981-07-23 Bernhard 8331 Mamming Schweininger Control circuit for vehicle headlights - reduces intensity by switching to lower-power light to avoid dazzling oncoming vehicle
GB2133532A (en) * 1983-01-10 1984-07-25 Guilherme Ysenbout Mogas Light sensitive switch
GB2135771A (en) * 1983-02-23 1984-09-05 Lutron Electronics Co Excess light turn-off circuit
GB2214289A (en) * 1986-02-11 1989-08-31 Egidio Basso Light-sensitive switch
GB2227088A (en) * 1989-01-05 1990-07-18 Liu Wen Jung Automobile headlight switching arrangement
GB2248107A (en) * 1990-07-24 1992-03-25 Artemis Papadopoulos Device to automatically regulate vehicle lights

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001394A1 (en) * 1980-01-16 1981-07-23 Bernhard 8331 Mamming Schweininger Control circuit for vehicle headlights - reduces intensity by switching to lower-power light to avoid dazzling oncoming vehicle
GB2133532A (en) * 1983-01-10 1984-07-25 Guilherme Ysenbout Mogas Light sensitive switch
GB2135771A (en) * 1983-02-23 1984-09-05 Lutron Electronics Co Excess light turn-off circuit
GB2214289A (en) * 1986-02-11 1989-08-31 Egidio Basso Light-sensitive switch
GB2214289B (en) * 1986-02-11 1992-08-26 Egidio Basso Light-sensitive switch structure and method with inverse off/on ratio
GB2227088A (en) * 1989-01-05 1990-07-18 Liu Wen Jung Automobile headlight switching arrangement
GB2227088B (en) * 1989-01-05 1992-12-09 Liu Wen Jung Automobile headlight switching arrangement
GB2248107A (en) * 1990-07-24 1992-03-25 Artemis Papadopoulos Device to automatically regulate vehicle lights

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