US2012338A - Reflector for lamps - Google Patents

Reflector for lamps Download PDF

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Publication number
US2012338A
US2012338A US698735A US69873533A US2012338A US 2012338 A US2012338 A US 2012338A US 698735 A US698735 A US 698735A US 69873533 A US69873533 A US 69873533A US 2012338 A US2012338 A US 2012338A
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reflector
lamps
deflected
parabolic
sections
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Expired - Lifetime
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US698735A
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Dietrich Friedrich Richard
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    • 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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas

Definitions

  • the invention relates to parabolic reflectors for beam projected straight ahead by reflector I. lamps for vehicles, room lighting, street light- This construction is suitable for vehicles with a ing and other purposes, its object being to prosingle head lamp, and for bicycle lamps.
  • Fig. 2 shows a For this purpose rim segments of the reflector construction with two parts 3 having a shorter are outwardly deflected about the focal point of focal length than the main part I. f the parabola.
  • the deflected segments may have The reflector may be made in one piece, by
  • main parabola,v and may be composed of a plufusing glass 5 is mounted on the edge 4 of the rality of bands, deflected to different degrees. It reflector to avoid a dark patch between the beams is generally of advantage to use a dispersive glass directed straight' ahead and to the side. with the reflector, as will be explained herein- What I claim is; 15 after. 1.
  • a reflector consisting of three mutually com- 15 Several examples of reflectors according to the plementary paraboloid longitudinal sections sepinvention are shown in the annexed drawing in arated by parallel, vertical planes, said sections which Figs. 1 and 2 are horizontal longitudinal having a common focal point, and two of said seccross-sections of two embodiments of the inventions being lateral sections deflected outwardly 20 tion. about said focal point. 20
  • Fig. 1 illustrates a parabolic central refiector 2.

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

Description

' REFLECTOR FOR LAMPS Filed Nov. 20, 1955 75'" ATTORNEY.
Patented Aug. 27, 1935 Y 2,012,338
UNITED STATES PATENT OFFICE REFLECTOR FOR LAMPS Friedrich Richard Dietrich, Pasing, near Munich, Germany Application November 2o, 1933, serial No. 698,735 In Germany November 23, 1932 2 Claims. (Cl. 24U-41.35)
The invention relates to parabolic reflectors for beam projected straight ahead by reflector I. lamps for vehicles, room lighting, street light- This construction is suitable for vehicles with a ing and other purposes, its object being to prosingle head lamp, and for bicycle lamps.
vide a reector which projects, in addition to a It is not essential that the parabolic curvature 5 parallel beam in the direction of the main axis, of the deflected portion of the reflector be the 5 deflected beams. same as that of the main portion. Fig. 2 shows a For this purpose rim segments of the reflector construction with two parts 3 having a shorter are outwardly deflected about the focal point of focal length than the main part I. f the parabola. The deflected segments may have The reflector may be made in one piece, by
10 parabolic curvatures differing from that of the means of stamping and appropriate dies. A dif. 10,y
main parabola,v and may be composed of a plufusing glass 5 is mounted on the edge 4 of the rality of bands, deflected to different degrees. It reflector to avoid a dark patch between the beams is generally of advantage to use a dispersive glass directed straight' ahead and to the side. with the reflector, as will be explained herein- What I claim is; 15 after. 1. A reflector consisting of three mutually com- 15 Several examples of reflectors according to the plementary paraboloid longitudinal sections sepinvention are shown in the annexed drawing in arated by parallel, vertical planes, said sections which Figs. 1 and 2 are horizontal longitudinal having a common focal point, and two of said seccross-sections of two embodiments of the inventions being lateral sections deflected outwardly 20 tion. about said focal point. 20
Fig. 1 illustrates a parabolic central refiector 2. A reflector according to claim l, and in which I and two deflected parts 3, at opposite sides of the side portions have a shorter focal length the lamp 2, so that an outwardly deflected beam than the central portion. is projected on both sides in addition to the FRIEDRICH RICHARD DIETRICH.
US698735A 1932-11-23 1933-11-20 Reflector for lamps Expired - Lifetime US2012338A (en)

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DE2012338X 1932-11-23

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US2012338A true US2012338A (en) 1935-08-27

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544533A (en) * 1944-11-30 1951-03-06 Oldham & Son Ltd Miner's electric cap lamp
US3390262A (en) * 1965-05-24 1968-06-25 Sylvania Electric Prod Multizone high power light reflector
EP0208895A2 (en) * 1985-07-13 1987-01-21 Robert Bosch Gmbh Dipped beam head light or fog light for motor vehicles
DE102010019372A1 (en) * 2010-05-05 2011-11-10 Volkswagen Ag Lighting device for motor vehicle, has closure disk, one reflecting surface for generating main light function and another reflecting surface which serves not for generating main light function

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544533A (en) * 1944-11-30 1951-03-06 Oldham & Son Ltd Miner's electric cap lamp
US3390262A (en) * 1965-05-24 1968-06-25 Sylvania Electric Prod Multizone high power light reflector
EP0208895A2 (en) * 1985-07-13 1987-01-21 Robert Bosch Gmbh Dipped beam head light or fog light for motor vehicles
EP0208895A3 (en) * 1985-07-13 1989-03-22 Robert Bosch Gmbh Dipped beam head light or fog light for motor vehicles
DE102010019372A1 (en) * 2010-05-05 2011-11-10 Volkswagen Ag Lighting device for motor vehicle, has closure disk, one reflecting surface for generating main light function and another reflecting surface which serves not for generating main light function

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