US2337833A - Reflector lamp - Google Patents
Reflector lamp Download PDFInfo
- Publication number
- US2337833A US2337833A US358645A US35864540A US2337833A US 2337833 A US2337833 A US 2337833A US 358645 A US358645 A US 358645A US 35864540 A US35864540 A US 35864540A US 2337833 A US2337833 A US 2337833A
- Authority
- US
- United States
- Prior art keywords
- light
- reflector
- light sources
- focal line
- lamp
- 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
Links
- 239000000203 mixture Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
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
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
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- 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
- F21V7/06—Optical design with parabolic curvature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
Definitions
- the invention relates to a reflector lamp or lighting unit in which electric light sources of different types, as for example, incandescent lamps and discharge lamps, are used, and an important feature of which is the proper combination of the different types of light produced.
- the object of the invention is to provide a lighting unit utilizing light sources of different types or kinds which is of simple construction and which may be economically manufactured and used.
- a more specific object of the invention is to provide a lighting unit wherein light sources of different types may be used and which shall function to properly mix the light from the sources without the use of special lenses.
- a further object of the invention is to provide a lighting unit wherein an incandescent lamp and a discharge lamp, or a plurality of each, may
- Another object of the invention is to provide a lighting unit of the character described wherein provision is made for adjusting the position of the light sources of one type, or both, in a direction perpendicular to the symmetric plane of the reflector, or in a direction radial to the focal line thereof, to change the direction of the light radiation and improve the mixture of the light output of the unit.
- Figure 1 is a diagrammatic view in side elevation of a lighting unit embodying the principal features of the invention
- Fig. 2 is a front or bottom view of the reflector of the unit of Fig. 1 showing one arrangement of the light sources;
- Fig. 3 is a section View along line IIIIII of Fig. 2;
- Fig. 4 is a view similar to Fig. 2 showing another arrangement of the lamp sources.
- a light source with a parabolic trough-shaped reflector for the use of two or more light sources of difierent types is provided in which two of the light sources of different types are arranged in the symmetric plane of the reflector on both sides of the focal line at equal or approximately equal distances from the latter.
- light sources of different types is meant light sources which produce light having different spectral distribution, as for example, incandescent lamps and discharge lamps.
- the parabolic trough-shaped reflector I is mounted in any suitable manner, in a housing 2 having a transparent or glass cover 3.
- the reflector I has a focal line F and a symmetric plane identified by the line A-F-B.
- each of two light sources of diiierent types are disposed at equal distances from the focal line F in the plane A-F-B.
- a filament source or incandescent lamp GI is, for example, disposed on one side of the focal line F in the direction of the light emission opening of the reflector and on the other side thereof a discharge lamp HgH is disposed.
- the light rays of the discharge lamp HgH which is disposed inside or back of the focal line F, diverge so that a bundle of radiation results, having the two diverging rays DC and EJ.
- the radiation emitted from the incandescent lamp GI which may be, for example, reflected at D and E converge and intersect at K and then extend to L and M, respectively.
- the ray DC of the discharge lamp HgI-I and a ray EK--M of the incandescent lamp GI extend approximately parallel.
- incandescent lamps GI and discharge lamps HgH are arranged alternately in the direction of the focal line F and the discharge lamps HgI-I are disposed in the spaces between the incandescent lamps GI.
- the arrangement illustrated in Fig. 4 is to be preferred. In this arrangement, each two light sources of different types are disposed opposite to each other and alternatively one lies on the inside and the other on the outside of the focal line. Within the individual rows of lamps, the lamps of the two different types alternate, i. e., group G-H follows group H-G, then follows G-H, etc.
- the light sources of one of the lamp rows accordingly may be made adjustable in any desired manner in a direction perpendicular to the symmetric plane or in a direction radial to the focal line.
- the invention disclosed provides a lighting unit of simple and economical construction which functions to produce an output of properly mixed light from light sources of difierent types without the use of special disbursing lenses, this result being accomplished by the use of a parabolic trough-shaped reflector and the proper arrangement or mounting of the light sources therein.
- a lighting unit for producing mixed light comprising, a parabolical trough-shaped reflector, a plurality of light sources all having a predetermined spectral distribution mounted therein a predetermined distance back of the focal line of the reflector with respect to the light emission opening thereof, and a plurality of light sources all having a different predetermined spectral distribution mounted therein on the opposite side of the focal line in spaced relation to the first-mentioned light sources and at substantially the same distance from the focal line, all of said light sources being located in the symmetric plane of the reflector, thereby to provide for combining the light from the dissimilar sources.
- a lighting unit for producing mixed light comprising, a parabolical trough-shaped reflector, a plurality of incandescent lamps mounted therein on one side of the focal line with their light source regions a predetermined distance therefrom, and a plurality of discharge lamps mounted therein on the opposite side of the focal line in spaced relation to the incandescent lamps, said discharge lamps having the centers of their light source regions located at substantially the same distance from the focal line as the light source regions of the incandescent lamps, all of said incandescent and discharge lamps being located in the symmetric plane of the reflector, thereby to provide for properly combining the light from the lamps.
- a lighting unit for producing mixed light comprising, a parabolical trough-shaped reflector, and a plurality of light sources of different kinds having different spectral distributions mounted within the reflector in spaced relation on opposite sides of the focal line thereof in the symmetric plane of the reflector, the light sources of one kind being positioned alternatively with the light sources of the other kind, thereby to provide for properly combining the light from the sources of difierent kinds by the use of a single reflector.
Description
A. PAHL REFLECTOR LAMP Dec. 28, 1943.
Filed Sept. 27, 1940 INVENTOR WITN7ESSES: 45% ,Z 4 7%,. (Z. 1'
Patented Dec. 28, 1943 REFLECTOR LAMP Arno Pahl, Berlin-Siemensstadt, Germany, assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application September 27, 1940, Serial No. 358,645 In Germany July 28, 1939 3 Claims.
The invention relates to a reflector lamp or lighting unit in which electric light sources of different types, as for example, incandescent lamps and discharge lamps, are used, and an important feature of which is the proper combination of the different types of light produced.
The object of the invention, generally stated, is to provide a lighting unit utilizing light sources of different types or kinds which is of simple construction and which may be economically manufactured and used.
A more specific object of the invention is to provide a lighting unit wherein light sources of different types may be used and which shall function to properly mix the light from the sources without the use of special lenses.
A further object of the invention is to provide a lighting unit wherein an incandescent lamp and a discharge lamp, or a plurality of each, may
be utilized, and a proper and desirable mixture of the light from the two different sources produced by means of a single reflector.
Another object of the invention is to provide a lighting unit of the character described wherein provision is made for adjusting the position of the light sources of one type, or both, in a direction perpendicular to the symmetric plane of the reflector, or in a direction radial to the focal line thereof, to change the direction of the light radiation and improve the mixture of the light output of the unit.
These and other objects and advantages of the invention will become more apparent from the following detailed description when read in conjunction with the drawing, in which:
Figure 1 is a diagrammatic view in side elevation of a lighting unit embodying the principal features of the invention;
Fig. 2 is a front or bottom view of the reflector of the unit of Fig. 1 showing one arrangement of the light sources;
Fig. 3 is a section View along line IIIIII of Fig. 2; and
Fig. 4 is a view similar to Fig. 2 showing another arrangement of the lamp sources.
In accordance with the invention, a light source with a parabolic trough-shaped reflector for the use of two or more light sources of difierent types is provided in which two of the light sources of different types are arranged in the symmetric plane of the reflector on both sides of the focal line at equal or approximately equal distances from the latter. By light sources of different types is meant light sources which produce light having different spectral distribution, as for example, incandescent lamps and discharge lamps.
In the apparatus shown in Fig. 1, the parabolic trough-shaped reflector I is mounted in any suitable manner, in a housing 2 having a transparent or glass cover 3. The reflector I has a focal line F and a symmetric plane identified by the line A-F-B. In accordance with the invention, each of two light sources of diiierent types are disposed at equal distances from the focal line F in the plane A-F-B.
In the illustrated example a filament source or incandescent lamp GI is, for example, disposed on one side of the focal line F in the direction of the light emission opening of the reflector and on the other side thereof a discharge lamp HgH is disposed. The light rays of the discharge lamp HgH, which is disposed inside or back of the focal line F, diverge so that a bundle of radiation results, having the two diverging rays DC and EJ. The radiation emitted from the incandescent lamp GI which may be, for example, reflected at D and E converge and intersect at K and then extend to L and M, respectively. The ray DC of the discharge lamp HgI-I and a ray EK--M of the incandescent lamp GI extend approximately parallel. The same applies for the ray EJ of the discharge lamp and the ray DK--L of the incandescent lamp. The arrangement of the two light sources in the symmetric plane of the reflector accordingly makes possible the achievement of a mixture of both types of light without using special disbursing lenses.
For longer reflectors it is preferable to so 1 arrange the light sources as is illustrated in Figs.
2, 3 and 4. In the example according to Fig. 2, incandescent lamps GI and discharge lamps HgH are arranged alternately in the direction of the focal line F and the discharge lamps HgI-I are disposed in the spaces between the incandescent lamps GI. The arrangement illustrated in Fig. 4 is to be preferred. In this arrangement, each two light sources of different types are disposed opposite to each other and alternatively one lies on the inside and the other on the outside of the focal line. Within the individual rows of lamps, the lamps of the two different types alternate, i. e., group G-H follows group H-G, then follows G-H, etc.
To change the direction of radiation and to improve the mixture of the light, it may be desirable that the light sources of one of the lamp rows accordingly, for example, the one on the inside of the focal line, or even the lamp sources of both rows of lamps, may be made adjustable in any desired manner in a direction perpendicular to the symmetric plane or in a direction radial to the focal line.
In view of the foregoing, it will be apparent that the invention disclosed provides a lighting unit of simple and economical construction which functions to produce an output of properly mixed light from light sources of difierent types without the use of special disbursing lenses, this result being accomplished by the use of a parabolic trough-shaped reflector and the proper arrangement or mounting of the light sources therein.
While I have shown anddescribed particular embodiments of my invention, it will be apparent to those skilled in the art that various changes and modifications may be made within the scope of my invention without departing from the spirit of the invention as defined in the appended claims.
I claim as myinvention:
1. A lighting unit for producing mixed light comprising, a parabolical trough-shaped reflector, a plurality of light sources all having a predetermined spectral distribution mounted therein a predetermined distance back of the focal line of the reflector with respect to the light emission opening thereof, and a plurality of light sources all having a different predetermined spectral distribution mounted therein on the opposite side of the focal line in spaced relation to the first-mentioned light sources and at substantially the same distance from the focal line, all of said light sources being located in the symmetric plane of the reflector, thereby to provide for combining the light from the dissimilar sources.
2. A lighting unit for producing mixed light comprising, a parabolical trough-shaped reflector, a plurality of incandescent lamps mounted therein on one side of the focal line with their light source regions a predetermined distance therefrom, and a plurality of discharge lamps mounted therein on the opposite side of the focal line in spaced relation to the incandescent lamps, said discharge lamps having the centers of their light source regions located at substantially the same distance from the focal line as the light source regions of the incandescent lamps, all of said incandescent and discharge lamps being located in the symmetric plane of the reflector, thereby to provide for properly combining the light from the lamps.
3. A lighting unit for producing mixed light comprising, a parabolical trough-shaped reflector, and a plurality of light sources of different kinds having different spectral distributions mounted within the reflector in spaced relation on opposite sides of the focal line thereof in the symmetric plane of the reflector, the light sources of one kind being positioned alternatively with the light sources of the other kind, thereby to provide for properly combining the light from the sources of difierent kinds by the use of a single reflector.
ARNO PAHL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2337833X | 1939-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2337833A true US2337833A (en) | 1943-12-28 |
Family
ID=7994971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US358645A Expired - Lifetime US2337833A (en) | 1939-07-28 | 1940-09-27 | Reflector lamp |
Country Status (1)
Country | Link |
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US (1) | US2337833A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2725461A (en) * | 1952-11-12 | 1955-11-29 | Analite Corp | Artificial daylight lamp |
DE1019762B (en) * | 1952-06-05 | 1957-11-21 | Siemens Ag | Exterior lights, in particular street lights |
US2833916A (en) * | 1953-05-25 | 1958-05-06 | Gen Electric | Luminaire |
US3141149A (en) * | 1959-12-23 | 1964-07-14 | Lawton Lawrence | Traffic signal device |
US6062706A (en) * | 1998-03-09 | 2000-05-16 | Light & Sound Design, Ltd. | Variable color fluorescent lighting |
FR2929683A1 (en) * | 2008-04-04 | 2009-10-09 | Thorn Europhane Sa | Light for lighting e.g. football ground, has reflector arranged inside polyhedral case such that rotational axis of paraboloid/ellipsoid forms angle of specific degrees, with respect to open outlet surface of case |
-
1940
- 1940-09-27 US US358645A patent/US2337833A/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1019762B (en) * | 1952-06-05 | 1957-11-21 | Siemens Ag | Exterior lights, in particular street lights |
US2725461A (en) * | 1952-11-12 | 1955-11-29 | Analite Corp | Artificial daylight lamp |
US2833916A (en) * | 1953-05-25 | 1958-05-06 | Gen Electric | Luminaire |
US3141149A (en) * | 1959-12-23 | 1964-07-14 | Lawton Lawrence | Traffic signal device |
US6062706A (en) * | 1998-03-09 | 2000-05-16 | Light & Sound Design, Ltd. | Variable color fluorescent lighting |
FR2929683A1 (en) * | 2008-04-04 | 2009-10-09 | Thorn Europhane Sa | Light for lighting e.g. football ground, has reflector arranged inside polyhedral case such that rotational axis of paraboloid/ellipsoid forms angle of specific degrees, with respect to open outlet surface of case |
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