GB741055A - Improvements in and relating to the elimination of dazzle by headlights of road vehicles - Google Patents

Improvements in and relating to the elimination of dazzle by headlights of road vehicles

Info

Publication number
GB741055A
GB741055A GB25428/52A GB2542852A GB741055A GB 741055 A GB741055 A GB 741055A GB 25428/52 A GB25428/52 A GB 25428/52A GB 2542852 A GB2542852 A GB 2542852A GB 741055 A GB741055 A GB 741055A
Authority
GB
United Kingdom
Prior art keywords
lamp
reflector
filament
lamp bulb
bulb
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
GB25428/52A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB741055A publication Critical patent/GB741055A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/30—Envelopes; Vessels incorporating lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

741,055. Vehicle headlights; electric lamp bulbs. DEVAUX, R. H. P., and FALASCHI, O. Oct. 10, 1952 [May 29, 1952], No. 25428/52. Classes 39(2), 75(2) and 75(4). In an anti-dazzle arrangement, for vehicle headlights, comprising a reflector and a lamp bulb 101, the envelope of the lamp bulb is provided with an axial screen 107, in front of the lamp filament, which is convex on the surface facing the filament and reflects light back towards the reflector, and with a lateral screen 105 or 106, between the filament and the reflector, which reflects back into the envelope dazzling light which would otherwise be reflected towards the side of the road occupied by oncoming traffic. As shown each side of the lamp bulb is screened by thickened, less transparent portions 103, 104, which may be coloured and are partially covered by opaque, backreflecting coatings 105, 106 respectively, the latter being, if desired, coloured differently from each other. The axial screen is provided by a concavity 107 in the outer surface of the bulb, covered by an opaque, back-reflecting coating 108 which extends laterally towards the thickened parts 103, 104. In a twin headlight, system the respective bulbs 101 may be of different colours to provide contrasting ilhunination and, in the event of failure of one headlight a means of identifying to oncoming traffic the sides of the vehicle. The axial and lateral screens may be detachably mounted on the lamp bulb.
GB25428/52A 1951-10-12 1952-10-10 Improvements in and relating to the elimination of dazzle by headlights of road vehicles Expired GB741055A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1065413T 1951-10-12

Publications (1)

Publication Number Publication Date
GB741055A true GB741055A (en) 1955-11-23

Family

ID=9602249

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25428/52A Expired GB741055A (en) 1951-10-12 1952-10-10 Improvements in and relating to the elimination of dazzle by headlights of road vehicles

Country Status (5)

Country Link
BE (1) BE520238A (en)
CH (1) CH317285A (en)
DE (1) DE1075067B (en)
FR (2) FR1065413A (en)
GB (1) GB741055A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4962450A (en) * 1987-01-19 1990-10-09 Reshetin Evgeny F Light signalling device

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE505873C (en) * 1930-08-28 Egarsol Glareless Reflector Co Non-dazzling concave mirror reflector with a diffuse reflective reflector
DE298841C (en) *
DE478325C (en) * 1929-06-25 Max Toepfer Headlights
DE299171C (en) *
DE461301C (en) * 1925-10-29 1928-06-16 Stanislas Julian Ostrorog Dimming device for headlights, especially for motor vehicles
DE483280C (en) * 1928-11-01 1929-09-27 Paul Giese Dimming device for headlights
FR685615A (en) * 1929-11-26 1930-07-12 Device <<code>>, removable, for automobile headlight reflectors
US1990666A (en) * 1931-04-20 1935-02-12 Charles E A O'loughlin Headlight dimmer
FR766557A (en) * 1933-03-29 1934-06-30 Automotive headlamp
FR788414A (en) * 1934-07-13 1935-10-10 Improvements to anti-glare devices for motor vehicles
CH233034A (en) * 1938-12-23 1944-06-30 Blendex Ag Device for dimming and light distribution of an incandescent lamp arranged in the reflector of a headlight, in particular for motor vehicles.
FR1002854A (en) * 1949-12-19 1952-03-11 Further training in headlights for wheeled vehicles
AT171620B (en) * 1950-05-26 1952-06-25 Axel Assmundson Headlights, in particular for side lighting in motor vehicles

Also Published As

Publication number Publication date
FR63040E (en) 1955-07-13
BE520238A (en)
CH317285A (en) 1956-11-15
FR1065413A (en) 1954-05-25
DE1075067B (en) 1960-02-11

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