US1451017A - Light shield and reflecting device - Google Patents

Light shield and reflecting device Download PDF

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Publication number
US1451017A
US1451017A US49241421A US1451017A US 1451017 A US1451017 A US 1451017A US 49241421 A US49241421 A US 49241421A US 1451017 A US1451017 A US 1451017A
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United States
Prior art keywords
reflector
lamp
light shield
reflecting device
light
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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
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Sterling B Franklin
Gavin S Younkin
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Individual
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Individual
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Priority to US49241421 priority Critical patent/US1451017A/en
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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
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—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
    • F21S41/30—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
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • 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
    • 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

  • Our invention relates to. improvements in light shields and reflecting devices particularly well adapted for use on automobiles.
  • the object of our invention is to provide a novel light shield and reflecting device which will prevent the reflection upwardly of the rays of a lamp mounted in an ordinary parabolic reflector, which will hide the lamp from View of a person standing a short distance away in front of the machine, and which will reflect the obstructed rays of the lamp upon the parabolic reflector in direc tions such that they will be directed forwardly and downwardly .by the parabolic reflector, thereby increasing the intensity of the light which is projected on the ground in front of the machine.
  • Our invention provides further a device of the kind described which is simple, cheap to make, durable, not liable to get out of order and which may be readily applied to lamps now in use.
  • Fig. 1 is a front view, partly in vertical section, and partly in elevation and partly broken away of our improved light shield and reflecting device.
  • Fig. 2 is a vertical sectional view of the line 22 of Fig. 1.
  • Fig. 3 is a horizontal section on the lin 33 of Fig. 1.
  • Fig. 4 is a diagrammatic view illustrating the directions of travel of a ray reflected by the shield reflector and parabolic reflector.
  • an ordinary parabolic reflector such as is commonly used in connection with automobile lamps and which has a central opening in which is fitted an ordinary incandescent lamp 2 with its filament located substantially in the focus F, of the reflector 1, the latter having a concave reflecting surface arranged to throw the rays of light forwardly and substantially in parallel lines.
  • Extending transversely across the front of the reflector 1 is the usual transparent glass plate 3 which is held in position by a ring 4, having a rearwardly extending annular flange 5, which embraces the periphery of the reflector 1, and which has a plurality of inwardly extending projections 6, adapted to respectivelyenter notches 7 in the periphery of the reflector 1, and which are adapted to engage the rear side of the reflector when the ring 4 is turned to the proper position.
  • a smaller substantially semicircular reflector '9 which is mounted in the reflector 1 in front of the focus of the latter, and in front of the lamp 2, and which extends from a point adjacent to the horizontal plane of the upper side of the lamp 2 downwardly and laterally across the axis of the reflector 1 to the reflecting surface of the latter.
  • the rear side of the reflector 9 is concave and is arranged to reflect rays which strike it rearwardly against the concave reflecting surface of the reflector 1.
  • the curvature and disposition of the concave reflecting surface of the reflector 9 are such that the ma jor portion of the rays of light reflected by it will be finally reflected forwardly and downwardly by the reflector 1 over the upper edge of the reflector 9 which is spaced apart from the upper side of the reflector 1, and which is, preferably slightly above the horizontal plane of the upper side of the lamp 2.
  • the latter For supporting the reflector 9 in the reflector 1, so as to permit ready insertion or removal of the reflector 9, the latter has attached to its forward side at one point adjacent to the middle thereof a T-shaped mem ber 10, the horizontal arms of which, as well as its vertical stein, are held between the glass 3 and the reflector 1.
  • Fig. 4 is illustrated the directions of travel of a ray of light FA passing from the lamp 2 to the reflector 9. From the point A, the ray of light passes to the point B on the reflector 1, thence to the point C on the reflector 9, thence to the point D on the reflector 1, and from thence downwardly and forwardly as indicated by the dotted line DE;
  • the reflector 9 While it serves as a shield forcovering the lamp 2 and for preventing rays from the lower half or the reflector 1 from being projected forwardly and upwardly, so
  • the comblnation With the usual parabolic reflector, a lamp therein, and a ring releasably engaging the reflector, of a second reflector located within thefirst and having a concave reflecting surface arranged to reflect light from the lamp against the reflecting surface of the first reflector, which is below the lamp, and having its rear edge fitted to the reflecting surface of the first reflector, the second reflector extending .to the horizontal plane of the top of the lamp, and a supporting plate secured to the second reflector and arranged toholdthe rear edge of the latter against-the first reflector and releasably held by the ring between the letter and the first reflector, substantially asset forth.

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

Description

S. B. FRANKLIN ET AL LIGHT SHIELD AND REFLECTING DEVICE Filed Aug. 15, 1921 In lll lllllli 'llIl llli II IIII A I I!!! HHKKW HWN h wry? - Fateiited Apr. 10, 1923 UNHTED STATES isten PATENT orricE.
STERLING B. FRANKLIN AND GAVIN S. YOUNKIN, OF ARKANSAS CITY, KANSAS.
LIGHT SHIELD AND REFLECTING DEVICE.
Application filed August 15, 1921. Serial No. 492,414.
have invented a certain new-and useful Improvement in Light Shields and Reflecting Devices, of which the following is a specification.
Our invention relates to. improvements in light shields and reflecting devices particularly well adapted for use on automobiles.
The object of our invention is to provide a novel light shield and reflecting device which will prevent the reflection upwardly of the rays of a lamp mounted in an ordinary parabolic reflector, which will hide the lamp from View of a person standing a short distance away in front of the machine, and which will reflect the obstructed rays of the lamp upon the parabolic reflector in direc tions such that they will be directed forwardly and downwardly .by the parabolic reflector, thereby increasing the intensity of the light which is projected on the ground in front of the machine.
Our invention provides further a device of the kind described which is simple, cheap to make, durable, not liable to get out of order and which may be readily applied to lamps now in use.
The novel features of our invention are hereinafter fully described and claimed.
In the accompanying drawing which illus trates the preferred embodiment of our invention,
Fig. 1 is a front view, partly in vertical section, and partly in elevation and partly broken away of our improved light shield and reflecting device.
Fig. 2 is a vertical sectional view of the line 22 of Fig. 1.
Fig. 3 is a horizontal section on the lin 33 of Fig. 1.
Fig. 4 is a diagrammatic view illustrating the directions of travel of a ray reflected by the shield reflector and parabolic reflector.
Similar reference characters designate similar parts in the different views.
1 designates an ordinary parabolic reflector, such as is commonly used in connection with automobile lamps and which has a central opening in which is fitted an ordinary incandescent lamp 2 with its filament located substantially in the focus F, of the reflector 1, the latter having a concave reflecting surface arranged to throw the rays of light forwardly and substantially in parallel lines.
Extending transversely across the front of the reflector 1 is the usual transparent glass plate 3 which is held in position by a ring 4, having a rearwardly extending annular flange 5, which embraces the periphery of the reflector 1, and which has a plurality of inwardly extending projections 6, adapted to respectivelyenter notches 7 in the periphery of the reflector 1, and which are adapted to engage the rear side of the reflector when the ring 4 is turned to the proper position.
8 designates a gasket interposed between the glass 3 and the reflector 1.
For obstructing the direct rays from the lamp 2, and the rays which would be reflected forwardly and upwardly by the lower half of the reflector 1, we provide a smaller substantially semicircular reflector '9, which is mounted in the reflector 1 in front of the focus of the latter, and in front of the lamp 2, and which extends from a point adjacent to the horizontal plane of the upper side of the lamp 2 downwardly and laterally across the axis of the reflector 1 to the reflecting surface of the latter.
The rear side of the reflector 9 is concave and is arranged to reflect rays which strike it rearwardly against the concave reflecting surface of the reflector 1. The curvature and disposition of the concave reflecting surface of the reflector 9 are such that the ma jor portion of the rays of light reflected by it will be finally reflected forwardly and downwardly by the reflector 1 over the upper edge of the reflector 9 which is spaced apart from the upper side of the reflector 1, and which is, preferably slightly above the horizontal plane of the upper side of the lamp 2. i
For supporting the reflector 9 in the reflector 1, so as to permit ready insertion or removal of the reflector 9, the latter has attached to its forward side at one point adjacent to the middle thereof a T-shaped mem ber 10, the horizontal arms of which, as well as its vertical stein, are held between the glass 3 and the reflector 1. I
In Fig. 4 is illustrated the directions of travel of a ray of light FA passing from the lamp 2 to the reflector 9. From the point A, the ray of light passes to the point B on the reflector 1, thence to the point C on the reflector 9, thence to the point D on the reflector 1, and from thence downwardly and forwardly as indicated by the dotted line DE;
From the above it will be understood that the reflector 9, While it serves as a shield forcovering the lamp 2 and for preventing rays from the lower half or the reflector 1 from being projected forwardly and upwardly, so
as to dazzle the eyes of a person standing or otherwise positioned in front of the machine carrying'the lamp, does not absorb the obstructed rays, but reflects them rearwardly against the reflector 1 in directions such that theyare eventually directed against the tionsmvithinthe scope of the appended claim,
may be-made Without departing from the spirit of our invention.
hat we. claim is I In a device of the kind described, the comblnation With the usual parabolic reflector, a lamp therein, and a ring releasably engaging the reflector, of a second reflector located within thefirst and having a concave reflecting surface arranged to reflect light from the lamp against the reflecting surface of the first reflector, which is below the lamp, and having its rear edge fitted to the reflecting surface of the first reflector, the second reflector extending .to the horizontal plane of the top of the lamp, and a supporting plate secured to the second reflector and arranged toholdthe rear edge of the latter against-the first reflector and releasably held by the ring between the letter and the first reflector, substantially asset forth.
In testimony whereof, we have signed our names to this specification,
STERLING B. FRANKLIN. GAVIN S; YOUNKIN. I
US49241421 1921-08-15 1921-08-15 Light shield and reflecting device Expired - Lifetime US1451017A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997149A (en) * 1998-03-31 1999-12-07 Manica Taiwan, Inc. Reversible backlit personal grooming mirror

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997149A (en) * 1998-03-31 1999-12-07 Manica Taiwan, Inc. Reversible backlit personal grooming mirror

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