US1594545A - Automobile headlight - Google Patents

Automobile headlight Download PDF

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Publication number
US1594545A
US1594545A US744125A US1594545A US 1594545 A US1594545 A US 1594545A US 744125 A US744125 A US 744125A US 1594545 A US1594545 A US 1594545A
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United States
Prior art keywords
reflector
filament
downwardly
light
automobile
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 - Lifetime
Application number
Inventor
Clarence A Michel
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.)
GUIDE MOTOR LAMP MANUFACTURING Co
Original Assignee
GUIDE MOTOR LAMP Manufacturing 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 GUIDE MOTOR LAMP Manufacturing Co filed Critical GUIDE MOTOR LAMP Manufacturing Co
Priority to US744125 priority Critical patent/US1594545A/en
Application granted granted Critical
Publication of US1594545A publication Critical patent/US1594545A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • 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
    • F21S41/33—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
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • This invention relates generallystdrautomobile headlights and more particular i to a novel construction of reflector adapted 'or v 5 having two independently operable klighting filaments.
  • the prime object in road illumination is tohavethe top ofthe beam at the proper legal height and at lthe same time carried as far forward as possible and in some in stances lateral spread has been obtained by the use of prismatic lensesand also fluted reectors.
  • prismatic lensesand also fluted reectors Furthermore, in most of the automobile headlights there are two incandescent lamps employed, one at the 'center which is usually of greater candle power than the second one, which 'is 'arranged near the top of the reector.
  • The' center light is intended to for road driving whereas the upper light known as the dimmer ris intended "for city driving or for use in passing another automobile.
  • the object of my invention is to employ a et single lamp having two filaments, this lamp being arranged at the center of the reector and another feature ofmy invention consists in constructing this reiiector so that one la- ,ment can be used for road driving and the to second filament for city driving or for use when passing another ⁇ automobile, inasmuch as the reflector is so constructed as to direct or bend downwardly the top portion of the beam so that all possibility of glare is elimice nated.
  • this control of the light is accomplished by correcting the up# per part of the upper half of the reflector and the lower part of the lower half of the renector and more specifically stated these to corrections are made by the modification of the two arabolic sections, the tilting of the sections downwardly, the use of a modifyin lens, or the wider separation of the foca ⁇ points of the sections ofthe parabola, or
  • T shall now' describe one form ⁇ of the reflector in connection with one form of filament and whereby the scope of my invention is accomplished.
  • Fig. l is a vertical sectional* View of my .improved form of reector with lamp arranged therein
  • Fig. 2 is a face View of the reflector.
  • A indicates an incandescent lamp having two independently lightedfilaments B and C; the filament B being placed very slightly below the axis of the reflector and the filament C approximately E of an inch below the filament li.
  • the filaments B and C have some lineal dimension and in practice it is preferred that the upper half of the reflector will have its focus substantially in fvertical alignment with the rear end of the iilamentutnd the lower half of the reiiector preferably has its focal point in vertical alignment' with the forward ends ofthe filaments.
  • the up er half of the-reector is tilted orwardly, the amount fof the tiltbein indicated by the full line F Gr whereas t e curyat-ure of revolution without the tilt is indi cated by the line F Gg.
  • the tilting of the axis is indicated by the dotted line X-X in Fig. l passing through the filament B. This pao..
  • the upper half' of the refiector being the axis of said section being tilted downwardly, the lower section of the reflector being parabolic with the lowerv forward portionv thereof tilted downwardly and whereby all of the rays fromeither filament will be refiected downwardly.
  • the upper filament being located slightly be! low theaxis of the reflector, the lower filament being located below the first 'named filament, the upper half of the reflector' bethe/axis thereofbeing tilted downwardly, the rear. portion of the'lower half of the reflector being parabolic, the forward portion of 'the said lower half of the reflector beingl acurvature of revolution the axis ofwhich is tilted downwardly -whereby the rays of light from either filament will be reflected downwardly and transition surfaces interposed between the upper and lower halves 'of the reflector and between thefront and rear 'sections of the lower half of the In testimony signature.

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

Description

Aug. 3 1926.` 1,594,545
C. A, MICHEL AUTOMOBILE HEADLIGHT Filed Feb. v, 1925 XJ *C 'w TRN -7 Q". A
- MM Wd@ Patentedv ng.. 3, 1926..
k.UNITED STATES PATENT OFFICE.
' CLARENCEA. MICHEL, 0F CLEVELAND, OHIO, ASSIGNOR TO THE GUIDE `MOTOR LAMP MANUFACTURING Application 4fily This invention relates generallystdrautomobile headlights and more particular i to a novel construction of reflector adapted 'or v 5 having two independently operable klighting filaments. f
At the present time all automobile headlights are 'constructed with the idea ofeliminatino' the disagreeable glare when approac ing another automobile.
` been accomplished to a certain extent /by modifyin the reflector in order to compensate for t e commercial filament. It accomplished sometimes by the peculiar coni struction of the headlight lens and in some instances bythe use of a lens in connection with a modified form of reflector.
The prime object in road illumination is tohavethe top ofthe beam at the proper legal height and at lthe same time carried as far forward as possible and in some in stances lateral spread has been obtained by the use of prismatic lensesand also fluted reectors. Furthermore, in most of the automobile headlights there are two incandescent lamps employed, one at the 'center which is usually of greater candle power than the second one, which 'is 'arranged near the top of the reector. The' center light is intended to for road driving whereas the upper light known as the dimmer ris intended "for city driving or for use in passing another automobile. Y y The object of my invention is to employ a et single lamp having two filaments, this lamp being arranged at the center of the reector and another feature ofmy invention consists in constructing this reiiector so that one la- ,ment can be used for road driving and the to second filament for city driving or for use when passing another` automobile, inasmuch as the reflector is so constructed as to direct or bend downwardly the top portion of the beam so that all possibility of glare is elimice nated. Broadly speaking, this control of the light is accomplished by correcting the up# per part of the upper half of the reflector and the lower part of the lower half of the renector and more specifically stated these to corrections are made by the modification of the two arabolic sections, the tilting of the sections downwardly, the use of a modifyin lens, or the wider separation of the foca `points of the sections ofthe parabola, or
This has is also.,l
COMPANY, or LEVELAND, omo, A conrona'rr'on or onro.
.eUroMoBInn HEADLIGHT.
aprebruary 7, 19a-5. serial No. 7,441.
any combination of the specific corrections hereinbefore mentloned.
u Having described the broad conception of use in connection with an 1ncandescent\la1np\ my invention, T shall now' describe one form \of the reflector in connection with one form of filament and whereby the scope of my invention is accomplished.
o. .ln the drawings forming part of this specification, Fig. l is a vertical sectional* View of my .improved form of reector with lamp arranged therein wand Fig. 2 is a face View of the reflector. y
Referring to the drawings A indicates an incandescent lamp having two independently lightedfilaments B and C; the filament B being placed very slightly below the axis of the reflector and the filament C approximately E of an inch below the filament li.
The filaments B and C have some lineal dimension and in practice it is preferred that the upper half of the reflector will have its focus substantially in fvertical alignment with the rear end of the iilamentutnd the lower half of the reiiector preferably has its focal point in vertical alignment' with the forward ends ofthe filaments. The up er half of the-reector, however, is tilted orwardly, the amount fof the tiltbein indicated by the full line F Gr whereas t e curyat-ure of revolution without the tilt is indi cated by the line F Gg. The tilting of the axis is indicated by the dotted line X-X in Fig. l passing through the filament B. This pao..
downward tilt of the upper halfof the reflector will insure the downward direction of the rays of light emanating from either filament. The forward and lower portion of the lower half of the redector isl also tilted downwardly as indicatedby the line ltll li ing of the one piece reflector T provide transition surfaces ll between the upper and vlower halves of the reflector and transition tti@ ilfld surfaces L between the sections of the lower half of the reector.,
'is entirely eliminated be uneven'and thelamp subject to a slight or for passing -other vehlcles inasmuch as the disagreeable glare even though the road rocking motion.
Although I have not shown any special construction of.headlight lens arranged Hin front of this reflector, it is obvious vthat a plain lens. could be employed and the reliector fluted or any suitable form of' inod fied lens could be employed for the'purpose,
of giving lateral distribution or ,spread to the controlled rays emanating from the reflector.
Having thus described my invention, what I claim is 1. In a light projector, the combination withan incandescent lamp having two independently li hted filaments and a reflector, one of said lidaments being located .slightly below the axis of the reflector and the second as the main or driving light andparticularly safe` ing parabolic,
-reectorl filament below the first named lament, the upper half' of the refiectorbeing the axis of said section being tilted downwardly, the lower section of the reflector being parabolic with the lowerv forward portionv thereof tilted downwardly and whereby all of the rays fromeither filament will be refiected downwardly.
2. In a light pro'ector, the combination with areflector an an incandescent lamp having twov independently lighted filaments,
parabolic,
the upper filament being located slightly be! low theaxis of the reflector, the lower filament being located below the first 'named filament, the upper half of the reflector' bethe/axis thereofbeing tilted downwardly, the rear. portion of the'lower half of the reflector being parabolic, the forward portion of 'the said lower half of the reflector beingl acurvature of revolution the axis ofwhich is tilted downwardly -whereby the rays of light from either filament will be reflected downwardly and transition surfaces interposed between the upper and lower halves 'of the reflector and between thefront and rear 'sections of the lower half of the In testimony signature.
CLARENCE A. MICHAEL.'
whereof, I hereunto affix my)y i u
US744125 1925-02-07 1925-02-07 Automobile headlight Expired - Lifetime US1594545A (en)

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