GB740239A - Improvements in photo-electric detector units for automatic headlamp dimming apparatus - Google Patents

Improvements in photo-electric detector units for automatic headlamp dimming apparatus

Info

Publication number
GB740239A
GB740239A GB29557/54A GB2955754A GB740239A GB 740239 A GB740239 A GB 740239A GB 29557/54 A GB29557/54 A GB 29557/54A GB 2955754 A GB2955754 A GB 2955754A GB 740239 A GB740239 A GB 740239A
Authority
GB
United Kingdom
Prior art keywords
photo
electric
dimming apparatus
electric detector
automatic headlamp
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
GB29557/54A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB740239A publication Critical patent/GB740239A/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

740,239. Photo-electric headlamp dimmer. GENERAL MOTORS CORPORATION. Oct. 20, 1952 [Nov. 10, 1951], No. 29557/54. Divided out of 740,160. Drawings to Specification. Class 40 (3). The subject-matter of the first five Figures of the present Specification is substantially identical with that of Specification 740,160, but the claims are directed to a photo-electric detector unit for automatic headlamp dimming apparatus wherein the photo-electric cell is exposed through a filter impervious to blue light but permitting the passage of light from the lamps of approaching vehicles. An embodiment is also described however (Fig. 6, not shown) where the refracting unit of the application referred to above is replaced by a flat filter of amber-coloured glass or plastic material for blocking blue light.
GB29557/54A 1951-11-10 1952-10-20 Improvements in photo-electric detector units for automatic headlamp dimming apparatus Expired GB740239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US740239XA 1951-11-10 1951-11-10

Publications (1)

Publication Number Publication Date
GB740239A true GB740239A (en) 1955-11-09

Family

ID=22117224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29557/54A Expired GB740239A (en) 1951-11-10 1952-10-20 Improvements in photo-electric detector units for automatic headlamp dimming apparatus

Country Status (1)

Country Link
GB (1) GB740239A (en)

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