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GB981207A - Electric lamps having a parabolic reflector and an incandescent filament for long-distance and short-distance lighting - Google Patents

Electric lamps having a parabolic reflector and an incandescent filament for long-distance and short-distance lighting

Info

Publication number
GB981207A
GB981207A GB37585/62A GB3758562A GB981207A GB 981207 A GB981207 A GB 981207A GB 37585/62 A GB37585/62 A GB 37585/62A GB 3758562 A GB3758562 A GB 3758562A GB 981207 A GB981207 A GB 981207A
Authority
GB
United Kingdom
Prior art keywords
filament
optical axis
extending
short
distance
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
GB37585/62A
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 GB981207A publication Critical patent/GB981207A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/164—Incandescent light sources, e.g. filament or halogen lamps having two or more filaments
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas

Landscapes

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

Abstract

981,207. Vehicle headlamps. R. MICKLEY. Oct. 4, 1962 [Oct. 9, 1961], No. 37585/62. Heading H1F. An electric lamp comprises a parabolic reflector, a filament extending in the horizontal plane containing the optical axis of the reflector from a point in front of the focal point to a point to the rear thereof or extending transversely through the focal point and an upper screen having a first portion extending above the filament in a plane parallel to the horizontal plane containing the optical axis from a point to the rear of the filament up to but not beyond the focal plane and a second portion between the apex of the reflector and the filament extending from the first portion to but not beyond the horizontal plane containing the optical axis. A second screen may be arranged below the filament having a first portion parallel to the horizontal plane containing the optical axis and extending from a point in front of the filament up to but not beyond the focal plane and a second portion in front of the filament extending from the first portion to but not beyond the horizontal plane containing the optical axis. Either screen may extend more on one side of the optical axis than on the other side which is directed towards the oncoming traffic. The screens may be mirror coated internally and dulled externally. The filament may be stirrup-shaped with the open end towards the apex of the reflector, a straight filament for the short-distance light being arranged between the arms of the stirrup. Alternatively, a straight filament for longdistance light may be used, two filaments for short-distance light being arranged one on each side of this. The long-distance filament may also be arranged transversely through the focal point, the filament for the short-distance light being arranged behind the focal point and below the plane of the first filament. Fig. 1 shows the effect of the screening, light from the filament 2 being prevented by the screens 5, 6 from reaching the areas 10, 19 of the reflector. Figs. 4 and 5 show a stirrup shaped main filament 3, a short-range filament 9 and upper and lower screens 6, 5, respectively, viewed from above and below, the lower screen 5 extending more on the side of the optical axis 1 remote from the traffic.
GB37585/62A 1961-10-09 1962-10-04 Electric lamps having a parabolic reflector and an incandescent filament for long-distance and short-distance lighting Expired GB981207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM51258A DE1170540B (en) 1961-10-09 1961-10-09 Two-filament incandescent lamp for dimmed high-beam and near-light in vehicle headlights

Publications (1)

Publication Number Publication Date
GB981207A true GB981207A (en) 1965-01-20

Family

ID=7307068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37585/62A Expired GB981207A (en) 1961-10-09 1962-10-04 Electric lamps having a parabolic reflector and an incandescent filament for long-distance and short-distance lighting

Country Status (5)

Country Link
US (1) US3200281A (en)
DE (1) DE1170540B (en)
GB (1) GB981207A (en)
NL (1) NL284072A (en)
SE (1) SE301914B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7014336A (en) * 1970-09-30 1972-04-05

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1280626A (en) * 1916-01-17 1918-10-08 Adelbert Ames Jr Reflector.
FR732284A (en) * 1931-05-04 1932-09-15 Lampes Sa Electric lamp for glare-free lighting, called
US1963672A (en) * 1931-06-05 1934-06-19 Bertrand A Parkes Circular drying, stretching, and finishing machine
FR743401A (en) * 1932-07-28 1933-03-30
US2245793A (en) * 1937-09-30 1941-06-17 Westinghouse Electric & Mfg Co Multiple filament lamp
US2501140A (en) * 1947-10-17 1950-03-21 Pique Baudilio Jesus Electric-light projecting reflector

Also Published As

Publication number Publication date
DE1170540B (en) 1964-05-21
NL284072A (en)
SE301914B (en) 1968-06-24
US3200281A (en) 1965-08-10

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