GB1253079A - - Google Patents

Info

Publication number
GB1253079A
GB1253079A GB1253079DA GB1253079A GB 1253079 A GB1253079 A GB 1253079A GB 1253079D A GB1253079D A GB 1253079DA GB 1253079 A GB1253079 A GB 1253079A
Authority
GB
United Kingdom
Prior art keywords
reflector
dipped
headlamp
auxiliary reflector
filament
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
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
Priority claimed from DE19671597924 external-priority patent/DE1597924A1/en
Application filed filed Critical
Publication of GB1253079A publication Critical patent/GB1253079A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/36Combinations of two or more separate reflectors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

1,253,079. Vehicle headlamp. ROBERT BOSCH G.m.b.H. 19 Dec., 1968 [19 Dec., 1967], No. 60503/68. Heading F4R. A motor vehicle headlamp has a parabolic main reflector 1 with a focal point F, a halogen filament light source 3, a translucent cover 2 and an auxiliary reflector 5 which is pivoted at 6 about an axis transverse to the optical axis of the main reflector and has its focus at F 2 . In the position shown the auxiliary reflector produces a main beam. When turned clockwise it produces a dipped beam (Fig. 3, not shown). The auxiliary reflector is less than semicircular in plan to provide an asymmetric beam and may have a screening hood (21, Figs. 6 and 7, not shown) to reduce dazzle when the headlamp is dipped or may have ribs (17, 18, Fig. 5, not shown) situated on its upper edge near the light source to give good light-dark boundaries. In a modification the pivot for the auxiliary reflector lies in a plane normal to the optical axis of the main reflector but is inclined to the horizontal. Thus when the headlamp is dipped, the beam is directed towards the nearside of the road. The cover 2 may be provided with diffusing corrugations on part of its surface. The axial coiled filament may be replaced by a transverse or oblique filament.
GB1253079D 1967-12-19 1968-12-19 Expired GB1253079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671597924 DE1597924A1 (en) 1967-12-19 1967-12-19 Automotive headlights

Publications (1)

Publication Number Publication Date
GB1253079A true GB1253079A (en) 1971-11-10

Family

ID=5680679

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1253079D Expired GB1253079A (en) 1967-12-19 1968-12-19

Country Status (2)

Country Link
FR (1) FR1599351A (en)
GB (1) GB1253079A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023758A (en) * 1989-11-13 1991-06-11 General Electric Company Single arc discharge headlamp with light switch for high/low beam operation

Also Published As

Publication number Publication date
FR1599351A (en) 1970-07-15

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees