US1354422A - Non-glare headlight - Google Patents

Non-glare headlight Download PDF

Info

Publication number
US1354422A
US1354422A US271502A US27150219A US1354422A US 1354422 A US1354422 A US 1354422A US 271502 A US271502 A US 271502A US 27150219 A US27150219 A US 27150219A US 1354422 A US1354422 A US 1354422A
Authority
US
United States
Prior art keywords
rays
light
reflector
shield
wall
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
US271502A
Inventor
Lloyd B Salt
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
Priority to US271502A priority Critical patent/US1354422A/en
Application granted granted Critical
Publication of US1354422A publication Critical patent/US1354422A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F21S41/435—Hoods or cap-shaped
    • 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
    • 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
    • F21S41/166—Incandescent light sources, e.g. filament or halogen lamps characterised by the shape of the filament
    • 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
    • F21S41/17—Discharge light sources
    • F21S41/173—Fluorescent light sources
    • 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
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/39—Attachment thereof
    • 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

Definitions

  • This invention relates to head lights, the same being particularly adapted for use on automobiles.
  • the object of the invention is to provide a head light from which the rays of light are reflected parallel to the axis of the reflector, said rays of light being confined within certain limits and thereby prevented from becoming objectionable by dazzling-the eyesight of anyone approaching from a direcwhich the rays on the line 22 of Fig. 1.
  • Fig. 3 is a view similar to Fig. 1, illustrating a modified embodiment of my invention.
  • Fig. 4- is a sectional plan taken on the line 4-4 of Fig. '3.
  • 5 represents a casing of any desired shape or construction, the same having mounted therein a reflector 6, provided with a-reflecting surface 7.
  • the reflector is constructed in the form of a parabola and is held in place in the casing. 5 behind the usual glass 8 by a rim 9 of any suitable ornamental design or construction.
  • a source of illumination preferably an electric light bulb 10
  • a source of illumination is mounted in a socket 11- at the rear of the reflector'6,-the filament 12 of said electric light bulb beinglocated at the focal (point of said reflector.
  • All the rays of light from the source of illunination striking the reflecting surface will Fig. 2 is a horizontal sectional plan takenbe reflected fiector.
  • a horizontal wall 13 is provided, said wall extending from the glass 8 parallel to the axis of the rerearwardly and intersecting the reflector 6.
  • the under face of the wall 13 has a reflecting surface 14 and all rays of light striking said surface will be reflected downwardly.
  • Theupper face of this wall has a non-refiecting surface 16, therefore all rays of light striking said surface are prevented from reflecting upwardly and outwardly and becoming objectionable to any one who might be in the direct path of said rays.
  • shield 17 is ,adjustably mounted upon the wall 13' and projects downwardly in front of the source of illumination, said shieldbe'ing fastened in place b means of a thumb screw 18.
  • the rear ace of the shield 17 has a reflecting surface 19 adapted to reflect all rays of light striking the same in a rearward direction.
  • the shield 17 is provided in order that the direct glow from the electric light bulb may be obscured.
  • the front face of the shield '17 has a nonreflecting surface 20.
  • the head light throws a powerful forward beam of light, all the ra s from'the-source of illumination which strike the parabolic reflecting surface being reflected parallel-to the axis of the reflector.
  • the walls 13 and 15 may be vertically disposed if necessary, and the surfaceof said walls which are exposed to the source of illumination may be adapted to reflect or absorb the rays of light as desired without departing from the spirit of my invention.
  • Figs 3 and 4 In Figs 3 and 4 is illustrated a modified construction embodying my invention in which a reflector 22 is provided having a reflecting surface 23.
  • the reflector In this form, however, the reflector is constructed in the form of a parabola only in the horizontal. plane. In the vertical plane the sides of the reflector are perfectly straight or at right angles to the horizontal plane.
  • An elongated electric light bulb is mounted in a socket 25 fast in a slide 26 and has a filament 27 which is located reflector 22.
  • a horizontal wall 28 extends from the glass-8 rearwardly and intersects the -reflector 22, said wall having a reflecting surface 29 exposed to the source of illumination.
  • Another horizontalwall 30 extends from the glass 8 rearwardly andintersects the reflector 22, said wall having a non-refleeting surface 31 which is exposed to the source of illumination.
  • a shield 32 is fast to the slide 26, said shield having a refiectingfsurface 3-3 adapted to reflect rays of light from the source of illumination rearwardly and also a nonreflecting front face 35 adapted to absorb any rays of light which might bereflected upon it.
  • the shield 32 together with the electric light bulb 24 are. adjustable togetherwith the slide 26-upon the wall 30 and are fastened thereto by a thumb screw 34;.
  • the Walls 28 and 30 of this form of reflector together with the shield 32 perform the same functions as do the corresponding walls and shield in the form illustrated in -Fi 8. land 2.
  • a reflector In a headlight, a reflector, said reflector in its horizontal plane being constructed upon a parabolic curve and in its vertical plane having straight sides, a horizontal wall intersecting the upper portion of said parabolic curve, said horizontal wall having a re-' fleeting surface, a second horizontal wall intersecting the lower portion of said parabolic curve, said second wall having a nonreflecting surface, a slide mounted upon said second named wall, a source of illumination mounted upon said slide and-located upon the focal axis of said parabolic curve, and a shield mounted upon said slide, said shield being parallel to the source of illumination and adapted to prevent the emission of direct rays of light therefrom, said shield and said slide being adjustable'either independently or simultaneously relatively to each other and to said parabolic curve.

Landscapes

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

Description

L. B. SALT- NON-GLARE HEADLIGHT.
APPLICATION FIL'ED JAN. 16, 1919.
Patentedsept. 28,1920.
0 aZflSaZt.
UNITED STATES PATENT OFFICE.
LLOYD IB. sAL'r, or DEDHAM, MASSACHUSETTS.
NONI-GLAIRE HEADLIGHT.
Specification of Letters Patent. Patented S t 28 1920 Application filed Janu-ary 1e, 1919. Serial No. 271,502.
To all whomit may concern:
Be it known that I, LLOYD B. SALT, a citizen of the United States, residingat Dedham, in the countyof Norfolk and State of lVIassachusetts, have invented new and use-.
ful Improvements in Non Glare Hea'dlights, of which the following is a specification.
- This invention relates to head lights, the same being particularly adapted for use on automobiles.
The object of the invention is to provide a head light from which the rays of light are reflected parallel to the axis of the reflector, said rays of light being confined within certain limits and thereby prevented from becoming objectionable by dazzling-the eyesight of anyone approaching from a direcwhich the rays on the line 22 of Fig. 1.
Fig. 3 is a view similar to Fig. 1, illustrating a modified embodiment of my invention.
Fig. 4-is a sectional plan taken on the line 4-4 of Fig. '3.
Like numerals refer to like parts throughout the several views of the drawings.
In the drawings, referring to Figs. 1 and 2, 5 represents a casing of any desired shape or construction, the same having mounted therein a reflector 6, provided with a-reflecting surface 7. The reflector is constructed in the form of a parabola and is held in place in the casing. 5 behind the usual glass 8 by a rim 9 of any suitable ornamental design or construction.
A source of illumination, preferably an electric light bulb 10, is mounted in a socket 11- at the rear of the reflector'6,-the filament 12 of said electric light bulb beinglocated at the focal (point of said reflector. All the rays of light from the source of illunination striking the reflecting surface will Fig. 2 is a horizontal sectional plan takenbe reflected fiector. In order to confine the rays of light within certain limits, a horizontal wall 13 is provided, said wall extending from the glass 8 parallel to the axis of the rerearwardly and intersecting the reflector 6.
The under face of the wall 13 has a reflecting surface 14 and all rays of light striking said surface will be reflected downwardly. Another horizontal wall 15, which is parallel to the wall 13,extends from the glass 8 rearwardly and intersects the reflector 6. Theupper face of this wall has a non-refiecting surface 16, therefore all rays of light striking said surface are prevented from reflecting upwardly and outwardly and becoming objectionable to any one who might be in the direct path of said rays.
shield 17 is ,adjustably mounted upon the wall 13' and projects downwardly in front of the source of illumination, said shieldbe'ing fastened in place b means of a thumb screw 18. The rear ace of the shield 17 has a reflecting surface 19 adapted to reflect all rays of light striking the same in a rearward direction. The shield 17 is provided in order that the direct glow from the electric light bulb may be obscured.
The front face of the shield '17 has a nonreflecting surface 20.
. In operation the head light throws a powerful forward beam of light, all the ra s from'the-source of illumination which strike the parabolic reflecting surface being reflected parallel-to the axis of the reflector.
P The rays of light which pass from the source 1 of illumination upward and especially those which pass upward and forward and would be dazzling to the eyes of a person facing said rays, strike the wall 13 and are reflected downward. 1 The direct rays passing forward from the source ofillumination are reflected rearwardly by .the shield and'those passing downwardly against the wall 15 are absorbed by the non-reflecting surface 16, the result being that all the rays of light which might dazzle the eyes and confuse anyone approaching said head light would be eliminated.
Itis obvious that the walls 13 and 15 may be vertically disposed if necessary, and the surfaceof said walls which are exposed to the source of illumination may be adapted to reflect or absorb the rays of light as desired without departing from the spirit of my invention.
' In Figs 3 and 4 is illustrated a modified construction embodying my invention in which a reflector 22 is provided having a reflecting surface 23. In this form, however, the reflector is constructed in the form of a parabola only in the horizontal. plane. In the vertical plane the sides of the reflector are perfectly straight or at right angles to the horizontal plane. An elongated electric light bulb is mounted in a socket 25 fast in a slide 26 and has a filament 27 which is located reflector 22.
A horizontal wall 28 extends from the glass-8 rearwardly and intersects the -reflector 22, said wall having a reflecting surface 29 exposed to the source of illumination. Another horizontalwall 30 extends from the glass 8 rearwardly andintersects the reflector 22, said wall having a non-refleeting surface 31 which is exposed to the source of illumination.
A shield 32 is fast to the slide 26, said shield having a refiectingfsurface 3-3 adapted to reflect rays of light from the source of illumination rearwardly and also a nonreflecting front face 35 adapted to absorb any rays of light which might bereflected upon it. The shield 32 together with the electric light bulb 24 are. adjustable togetherwith the slide 26-upon the wall 30 and are fastened thereto by a thumb screw 34;.
The Walls 28 and 30 of this form of reflector together with the shield 32 perform the same functions as do the corresponding walls and shield in the form illustrated in -Fi 8. land 2.
aving thus, specifically described my inventlon, what I claim and desire by Letters Patent to secure is:
plane having straight sides, a pairof parallel horizontal walls intersecting said parabolic curve adapted to confine the rays of at-the focal axis of the lel horizontal walls intersecting said para ,bolic curve adapted to confine the rays of light reflected therefrom, a slide adjustably mounted upon one of said horizontal walls, a source of illumination mounted upon said,
slide and located upon the focal axis of said parabolic curve, and a shield adjustably" mounted uponv said slide, said shield being parallel to the source of illumination and adapted to prevent the emission of direct rays of light therefrom.
3 In a headlight, a reflector, said reflector in its horizontal plane being constructed upon a parabolic curve and in its vertical plane having straight sides, a horizontal wall intersecting the upper portion of said parabolic curve, said horizontal wall having a re-' fleeting surface, a second horizontal wall intersecting the lower portion of said parabolic curve, said second wall having a nonreflecting surface, a slide mounted upon said second named wall, a source of illumination mounted upon said slide and-located upon the focal axis of said parabolic curve, and a shield mounted upon said slide, said shield being parallel to the source of illumination and adapted to prevent the emission of direct rays of light therefrom, said shield and said slide being adjustable'either independently or simultaneously relatively to each other and to said parabolic curve. In testimony whereof. I have hereunto se my hand in presence of two subscribing witnesses.
. LLOYD B. SALT.
Witnesses:
FRANKLIN E. Low,
CHARLES S. GooDINo.
US271502A 1919-01-16 1919-01-16 Non-glare headlight Expired - Lifetime US1354422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US271502A US1354422A (en) 1919-01-16 1919-01-16 Non-glare headlight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US271502A US1354422A (en) 1919-01-16 1919-01-16 Non-glare headlight

Publications (1)

Publication Number Publication Date
US1354422A true US1354422A (en) 1920-09-28

Family

ID=23035868

Family Applications (1)

Application Number Title Priority Date Filing Date
US271502A Expired - Lifetime US1354422A (en) 1919-01-16 1919-01-16 Non-glare headlight

Country Status (1)

Country Link
US (1) US1354422A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540417A (en) * 1943-03-13 1951-02-06 Hartford Nat Bank & Trust Co Searchlight having a linear source of light and two parabolic reflectors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540417A (en) * 1943-03-13 1951-02-06 Hartford Nat Bank & Trust Co Searchlight having a linear source of light and two parabolic reflectors

Similar Documents

Publication Publication Date Title
US1421506A (en) Headlight
US2539927A (en) Antiglare headlight
US1969714A (en) Headlight lens
US2020130A (en) Vehicle headlight lamp
US1354422A (en) Non-glare headlight
US1598106A (en) Automobile headlight
US1912487A (en) Headlight
US1712027A (en) Light-projecting device
US2273951A (en) Combined fog and driving light
US2171336A (en) Nonglare reflector
US1641714A (en) Headlight
US1397793A (en) Headlight
US2074626A (en) Antidazzle device for vehicle head lamps
US1394934A (en) Headlight-reflector
US1205916A (en) Illuminating apparatus.
US2119734A (en) Headlight for vehicles
US1845628A (en) Light
US1621085A (en) Headlight
US2262098A (en) Head lamp of motor vehicles
US2213012A (en) Lamp
US1502452A (en) Lamp
US1409469A (en) Automobile headlight
US1502453A (en) Headlight
US1640288A (en) Nonglare headlight
US3293475A (en) Multifilament lamp with a full shield for one filament