EP0061527B1 - Pendant lighting fixture - Google Patents

Pendant lighting fixture Download PDF

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Publication number
EP0061527B1
EP0061527B1 EP81109267A EP81109267A EP0061527B1 EP 0061527 B1 EP0061527 B1 EP 0061527B1 EP 81109267 A EP81109267 A EP 81109267A EP 81109267 A EP81109267 A EP 81109267A EP 0061527 B1 EP0061527 B1 EP 0061527B1
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EP
European Patent Office
Prior art keywords
lamp
light
mirror
mirrors
fitting
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Expired
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EP81109267A
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German (de)
French (fr)
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EP0061527A1 (en
Inventor
Joachim Dipl.-Ing. Leibig
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Siemens AG
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Siemens AG
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Priority to AT81109267T priority Critical patent/ATE11693T1/en
Publication of EP0061527A1 publication Critical patent/EP0061527A1/en
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Publication of EP0061527B1 publication Critical patent/EP0061527B1/en
Expired legal-status Critical Current

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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
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
    • 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
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the invention relates to a pendant lamp for a rod-shaped lamp arranged horizontally during operation, according to the first part of claim 1, as shown in US-A-3 158 327.
  • a lamp is characterized by very good shielding, the shielding angle - measured against the horizontal - being equal to or greater than 30 ° to 40 ° and indicating the range in which the luminance of the lamp is below 200 cd per square meter.
  • the known luminaire has a poor operating efficiency, which can be attributed to several unfavorable properties: First, an upward-looking mirror is arranged in the lower light outlet opening for longitudinal shielding, which reflects a substantial part of the luminous flux of the lamp back onto it; at the same time, a wide angular range is shadowed under the lamp.
  • the ratio of the luminous fluxes emitted upwards and downwards and their light distribution curve are decisive for the lighting efficiency of a lighting system.
  • the maxima of the upward light distribution curve are too high, since the lamp is arranged too deep in the lamp and furthermore the upper mirrors radiate steeply upwards, that is to say not crosswise.
  • the invention has for its object to improve the operating efficiency of a pendant lamp of the type mentioned with good shielding and reflecting reflectors in order to achieve a higher lighting efficiency in lighting systems and by appropriate design of the upper light distribution curve.
  • a pendant luminaire according to the invention has a luminaire operating efficiency of over 88%, which is substantially above the 70 to 72% of a comparable pendant luminaire with mirror reflectors of comparable shielding known to date.
  • a luminaire according to the invention In a luminaire according to the invention, more than 50% of the luminous flux is emitted upwards, with a very broad light distribution curve. Contrary to previous assumptions by experts, this enables lighting efficiency to be achieved that is even higher in rooms with a K value greater than 1.5 than in a system with only downward-radiating, equally shielded mirror lights.
  • the K value is a parameter of the Room dimensions and defined by the product of length times width divided by the sum of length and width multiplied by the height. In rooms with a height of 2.8 m to 3 m, the aforementioned condition for an area larger than 50 m 2 is fulfilled. In smaller rooms - common single rooms - the same lighting efficiency can still be achieved as with exclusively direct-luminaires.
  • the pendant lamp has a housing 2 with a frame 20, within which a side reflector 3 is arranged on opposite longitudinal walls; each of these side reflectors consists of a bottom mirror 32, which ends at the top in a boundary edge 30, which is then followed by an oppositely curved top mirror 31.
  • the top and bottom mirrors of opposite side reflectors are bent such that they radiate crosswise through an upper light exit opening 21 and through a lower light exit opening 22, respectively.
  • each side reflector has essentially the same course as known darklight mirrors; it is essentially a parabola with a focal length of 45 mm and a main axis inclined at 35 ° to the vertical, the focal point being at the center M of the lamp 1.
  • the lower mirror 32 ends below a horizontal tangential plane on the lamp 1.
  • the upper mirror 31 connected above it runs essentially on a circle with the radius R, the center N of which in the vertical plane and passing through the center of the lamp 1 lies in the upper light exit plane 21. This radius is about three times the diameter of the lamp, which is 26 mm.
  • the maximum of the light distribution curve generated by this top mirror is 120 °.
  • transverse slats 4 are arranged in a known form between the lower mirrors.
  • the upper light outlet voltage extends like the lower one across the entire width of the housing 2.
  • the lower part of this center mirror has a substantially V-shaped cross section and is formed by auxiliary mirrors 51, the lower edge 50 of which only extends to the transverse slats 4.
  • auxiliary mirrors runs according to a parabola with a focal length of 17 mm, the main axis of which passes through the center M of the respectively adjacent lamp 1 or 1 'and forms an angle of 20 ° with the vertical.
  • the distance A from the center M of each lamp from the plane of symmetry S and the distance B from its center from the horizontal plane passing through the lower edge 50 of the center mirror 5 are dimensioned such that the shielding angle ⁇ 'determined thereby is at least as large as that required and by the side reflectors 3 given shielding angles y.
  • the auxiliary mirror 51 ends at the top somewhat below the horizontal plane passing through the center M of the lamp.
  • Fig. 1 the free beam angle of the lamp 1 is entered; the upper free jet angle is designated a and is considerably larger than the lower free jet angle designated ⁇ .
  • a the upper free jet angle
  • ⁇ the lower free jet angle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1. A pendant light-fitting having upper (21) and lower (22) light outlet apertures for a rod-shaped lamp (1) which radiates evenly in all directions during operation, and is horizontally arranged between said outlet apertures ; - having two side reflectors (3) ; -- each side reflector having a lower mirror (32) which radiates through the lower light outlet aperture (22), overlaid by an upper mirror (31) bordering on the lower mirror (32) at a boundary edge (30) to radiate through the upper light outlet aperture (21) ; -- the side reflectors (3) being arranged parallel to the lamp (1) on each side thereof, whereby : - the lower mirrors (32) radiate crosswise, - the upper free beam angle (alpha) is at least as large as the lower free beam angle (beta), where this free beam angle lies between the boundary beams at the edges of the upper and lower light outlet apertures which are simultaneously tangents to the lamp enclosing it between them, characterised in - that the boundary edge (30) of each side reflector (3) lies in or below the lower horizontal tangential plane of the lamp (1) ; - that the upper mirrors (31) also radiate crosswise ; - that the lamp (1) is arranged at such a height and the upper mirrors (31) are so designed that the maximum of the light distribution curve produced thereby is below 130 degrees, - and that transverse lamellae (4) are arranged between the lower mirrors (32) in the lower light outlet aperture (22).

Description

Die Erfindung betrifft eine Pendelleuchte für eine im Betrieb horizontal angeordnete stabförmige Lampe, gemäss dem ersten Teil von Patentanspruch 1, wie sie die US-A-3 158 327 zeigt. Eine solche Leuchte zeichnet sich durch eine sehr gute Abschirmung aus, wobei der Abschirmwinkel - gemessen gegen die Horizontale - gleich oder grösser 30° bis 40° ist und den Bereich angibt, in dem die Leuchtdichte der Leuchte unter 200 cd pro qm liegt.The invention relates to a pendant lamp for a rod-shaped lamp arranged horizontally during operation, according to the first part of claim 1, as shown in US-A-3 158 327. Such a lamp is characterized by very good shielding, the shielding angle - measured against the horizontal - being equal to or greater than 30 ° to 40 ° and indicating the range in which the luminance of the lamp is below 200 cd per square meter.

Die bekannte Leuchte hat jedoch einen schlechten Betriebswirkungsgrad, der auf mehrere ungünstige Eigenschaften zurückzuführen ist: Zunächst ist in der unteren Lichtaustrittsöffnung zur Längsabschirmung ein nach oben gerichteter Spiegel angeordnet, der einen wesentlichen Teil des Lichtstromes der Lampe auf diese zurückreflektiert; zugleich ist ein breiter Winkelbereich unter der Leuchte abgeschattet.However, the known luminaire has a poor operating efficiency, which can be attributed to several unfavorable properties: First, an upward-looking mirror is arranged in the lower light outlet opening for longitudinal shielding, which reflects a substantial part of the luminous flux of the lamp back onto it; at the same time, a wide angular range is shadowed under the lamp.

Für den Beleuchtungswirkungsgrad einer Beleuchtungsanlage ist neben dem Betriebswirkungsgrad der Leuchte auch das Verhältnis der nach oben und unten ausgestrahlten Lichtströme sowie deren Lichtverteilungskurve massgebend. In dem bekannten Fall liegen die Maxima der nach oben gerichteten Lichtverteilungskurve zu hoch, da die Lampe zu tief in der Leuchte angeordnet ist und ferner die Oberspiegel steil nach oben, also nicht über Kreuz, strahlen.In addition to the operating efficiency of the luminaire, the ratio of the luminous fluxes emitted upwards and downwards and their light distribution curve are decisive for the lighting efficiency of a lighting system. In the known case, the maxima of the upward light distribution curve are too high, since the lamp is arranged too deep in the lamp and furthermore the upper mirrors radiate steeply upwards, that is to say not crosswise.

Der Erfindung liegt die Aufgabe zugrunde, den Betriebswirkungsgrad einer Pendelleuchte der eingangs genannten Art mit guter Abschirmung und spiegelnden Reflektoren zu verbessern, um dadurch und durch eine entsprechende Gestaltung der oberen Lichtverteilungskurve einen höheren Beleuchtungswirkungsgrad in Beleuchtungsanlagen erzielen zu können.The invention has for its object to improve the operating efficiency of a pendant lamp of the type mentioned with good shielding and reflecting reflectors in order to achieve a higher lighting efficiency in lighting systems and by appropriate design of the upper light distribution curve.

Die Aufgabe wird erfindungsgemäss durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.The object is achieved according to the invention by the features specified in the characterizing part of claim 1.

Aus der DE-A-1 963 881 ist zwar eine nach oben und unten strahlende Pendelleuchte bekannt, bei der die Seitenreflektoren Ober- und Unterspiegel haben, die beide jeweils über Kreuz strahlen, jedoch wird hierbei eine nach oben praktisch völlig abgeschirmte Reflexschicht-Leuchtstofflampe verwendet; dementsprechend ist das Problem einer optimalen Lichtstromaufteilung, das der Erfindung zugrundeliegt, nicht behandelt.From DE-A-1 963 881 an up and down radiating pendant lamp is known, in which the side reflectors have top and bottom mirrors, both of which radiate crosswise, but here a practically completely shielded fluorescent lamp is used ; accordingly, the problem of optimal luminous flux distribution, on which the invention is based, is not dealt with.

Eine erfindungsgemässe Pendelleuchte hat einen Leuchtenbetriebswirkungsgrad von über 88%, der wesentlich über den 70 bis 72 % einer vergleichbaren bisher bekannten Pendelleuchte mit Spiegelreflektoren vergleichbarer Abschirmung liegt.A pendant luminaire according to the invention has a luminaire operating efficiency of over 88%, which is substantially above the 70 to 72% of a comparable pendant luminaire with mirror reflectors of comparable shielding known to date.

Bei einer Leuchte nach der Erfindung wird mehr als 50% des Lichtstromes nach oben, und zwar mit einer sehr breiten Lichtverteilungskurve, abgestrahlt. Dadurch lässt sich entgegen den bisherigen Annahmen der Fachwelt ein Beleuchtungswirkungsgrad erreichen, der in Räumen mit einem K-Wert grösser als 1,5 sogar über dem einer Anlage mit nur nach unten strahlenden, ebenso abgeschirmten Spiegelleuchten liegtl Der K-Wert ist dabei eine Kenngrösse der Raumabmessungen und definiert durch das Produkt von Länge mal Breite dividiert durch die Summe von Länge und Breite multipliziert mit der Höhe. Bei Räumen mit einer Höhe von 2,8 m bis 3 m ist die vorgenannte Bedingung für eine Fläche grösser 50 m2 erfüllt. Bei kleineren Räumen - übliche Einzelzimmer - lässt sich immer noch etwa der gleiche Beleuchtungswirkungsgrad wie mit ausschliesslich direkt strahlenden Leuchten erzielen.In a luminaire according to the invention, more than 50% of the luminous flux is emitted upwards, with a very broad light distribution curve. Contrary to previous assumptions by experts, this enables lighting efficiency to be achieved that is even higher in rooms with a K value greater than 1.5 than in a system with only downward-radiating, equally shielded mirror lights. The K value is a parameter of the Room dimensions and defined by the product of length times width divided by the sum of length and width multiplied by the height. In rooms with a height of 2.8 m to 3 m, the aforementioned condition for an area larger than 50 m 2 is fulfilled. In smaller rooms - common single rooms - the same lighting efficiency can still be achieved as with exclusively direct-luminaires.

Eine besonders vorteilhafte Weiterbildung der Erfindung ergibt sich mit zwei parallel nebeneinander zwischen den Seitenreflektoren liegenden Lampen, wenn zwischen ihnen ein Mittenspiegel mit V-förmigem Querschnitt angeordnet wird, dessen Unterkante nicht bis in die untere Lichtaustrittsebene reicht. Hierbei lassen sich die Lampen so dicht an diesen Mittenspiegel heranrücken, dass sich mindestens der gleiche Abschirmwinkel wie mit den Seitenreflektoren ergibt; durch geeignete Krümmung des Mittenspiegels lassen sich gleichzeitig Einbrüche in der unteren Lichtverteilungskurve vermeiden. Im Vergleich zu einerzweilampigen Spiegelleuchte konventioneller Bauart mit gleichem Abschirmwinkel zeichnet sich diese Ausbildungsform der Erfindung durch eine wesentlich geringere Breite und damit durch günstigere Proportionen aus. Ein Ausführungsbeispiel dieser Art mit weiteren in den Unteransprüchen gekennzeichneten Merkmalen wird anhand der Figuren näher erläutert; es zeigen:

  • Fig. 1 einen Querschnitt durch eine zur Symmetrieebene S symmetrische Pendelleuchte und
  • Fig. 2 die zugehörige Lichtverteilungskurve in der Ebene der Fig. 1.
A particularly advantageous development of the invention results with two lamps lying parallel next to one another between the side reflectors if a center mirror with a V-shaped cross section is arranged between them, the lower edge of which does not extend into the lower light exit plane. The lamps can be moved so close to this center mirror that the shielding angle is at least the same as that of the side reflectors; A suitable curvature of the center mirror can also prevent dips in the lower light distribution curve. Compared to a two-lamp mirror lamp of conventional design with the same shielding angle, this embodiment of the invention is characterized by a significantly smaller width and thus by more favorable proportions. An embodiment of this type with further features characterized in the subclaims is explained in more detail with reference to the figures; show it:
  • Fig. 1 shows a cross section through a symmetrical to the plane of symmetry S pendant lamp
  • FIG. 2 shows the associated light distribution curve in the plane of FIG. 1.

Die Pendelleuchte weist ein Gehäuse 2 mit einem Rahmen 20 auf, innerhalb dessen an gegenüberliegenden Längswändenn je ein Seitenreflektor 3 angeordnet ist; jeder dieser Seitenreflektoren besteht aus einem Unterspiegel 32, der oben in einer Grenzkante 30 endet, an die sich dann ein gegensinnig gekrümmter Oberspiegel 31 anschliesst. Die Ober- und Unterspiegel gegenüberliegender Seitenreflektoren sind so gebogen, dass sie über Kreuz durch eine obere Lichtaustrittsöffnung 21 bzw. durch eine untere Lichtaustrittsöffnung 22 strahlen.The pendant lamp has a housing 2 with a frame 20, within which a side reflector 3 is arranged on opposite longitudinal walls; each of these side reflectors consists of a bottom mirror 32, which ends at the top in a boundary edge 30, which is then followed by an oppositely curved top mirror 31. The top and bottom mirrors of opposite side reflectors are bent such that they radiate crosswise through an upper light exit opening 21 and through a lower light exit opening 22, respectively.

Der Unterspiegel 32 jedes Seitenreflektors hat im wesentlichen den gleichen Verlauf wie bekannte Darklight-Spiegel; es handelt sich somit im wesentlichen um eine Parabel, mit einer Brennweite von 45 mm und einer um 35° gegen die Vertikale geneigten Hauptachse, wobei der Brennpunkt im Mittelpunkt M der Lampe 1 liegt.The bottom mirror 32 of each side reflector has essentially the same course as known darklight mirrors; it is essentially a parabola with a focal length of 45 mm and a main axis inclined at 35 ° to the vertical, the focal point being at the center M of the lamp 1.

Im Gegensatz zu bekannten Darklight-Spiegeln endet der Unterspiegel 32 unterhalb einer horizontalen Tangentialebene an die Lampe 1. Der darüber anschliessende Oberspiegel 31 verläuft im wesentlichen auf einem Kreis mit dem Radius R, dessen Mittelpunkt N in der durch die Mitte der Lampe 1 gehenden Vertikalebene und in 'der oberen Lichtaustrittsebene 21 liegt. Dieser Radius ist etwa dreimal so gross wie der Durchmesser der Lampe, der 26 mm beträgt. Das Maximum der dabei von diesem Oberspiegel erzeugten Lichtverteilungskurve liegt bei 120°.In contrast to known darklight mirrors, the lower mirror 32 ends below a horizontal tangential plane on the lamp 1. The upper mirror 31 connected above it runs essentially on a circle with the radius R, the center N of which in the vertical plane and passing through the center of the lamp 1 lies in the upper light exit plane 21. This radius is about three times the diameter of the lamp, which is 26 mm. The maximum of the light distribution curve generated by this top mirror is 120 °.

In der unteren Lichtaustrittsöffnung 22 sind zwischen den Unterspiegeln Querlamellen 4 in bekannter Form angeordnet. Die obere Lichtaustrittsöffnung erstreckt sich wie die untere über die gesamte Breite des Gehäuses 2. Dicht unter der oberen Lichtaustrittsöffnung 21 sind zwei Leuchtstoffröhren als Lampen 1, l' mit gleichem Abstand A von der Symmetrieachse S der Leuchte angeordnet, zwischen denen ein Mittenspiegel 5 liegt. Der untere Teil dieses Mittenspiegels hat im wesentlichen V-förmigen Querschnitt und wird von Hilfsspiegeln 51 gebildet, deren Unterkante 50 nur bis an die Querlamellen 4 reicht. Die Krümmung dieser Hilfsspiegel verläuft nach einer Parabel mit einer Brennweite von 17 mm, deren Hauptachse durch den Mittelpunkt M der jeweils benachbarten Lampe 1 bzw. l' geht und mit der Vertikalen einen Winkel von 20° einschliesst. Der Abstand A des Mittelpunktes M jeder Lampe von der Symmetrieebene S und der Abstand B ihres Mittelpunktes von der durch die Unterkante 50 des Mittenspiegels 5 gehenden Horizontalebene sind so bemessen, dass der dadurch bestimmte Abschirmwinkel γ' mindestens so gross ist wie der jeweils geforderte und durch die Seitenreflektoren 3 gegebene Abschirmwinkel y.In the lower light exit opening 22 transverse slats 4 are arranged in a known form between the lower mirrors. The upper light outlet voltage extends like the lower one across the entire width of the housing 2. Two fluorescent tubes as lamps 1, 1 'are arranged just below the upper light exit opening 21, at the same distance A from the axis of symmetry S of the lamp, between which there is a center mirror 5. The lower part of this center mirror has a substantially V-shaped cross section and is formed by auxiliary mirrors 51, the lower edge 50 of which only extends to the transverse slats 4. The curvature of these auxiliary mirrors runs according to a parabola with a focal length of 17 mm, the main axis of which passes through the center M of the respectively adjacent lamp 1 or 1 'and forms an angle of 20 ° with the vertical. The distance A from the center M of each lamp from the plane of symmetry S and the distance B from its center from the horizontal plane passing through the lower edge 50 of the center mirror 5 are dimensioned such that the shielding angle γ 'determined thereby is at least as large as that required and by the side reflectors 3 given shielding angles y.

Die Hilfsspiegel 51 enden oben etwas unterhalb der durch den Mittelpunkt M der Lampe gehenden Horizontalebene.The auxiliary mirror 51 ends at the top somewhat below the horizontal plane passing through the center M of the lamp.

In Fig. 1 sind die Freistrahlwinkel der Lampe 1 eingetragen; der obere Freistrahlwinkel ist mit a bezeichnet und erheblich grösser als der mit β bezeichnete untere Freistrahlwinkel. Das kommt auch in der in Fig. 2 dargestellten Lichtverteilungskurve zum Ausdruck: Der nach oben gerichtete Teil überstreicht einen wesentlich breiteren Bereich als der nach unten gerichtete; dementsprechend sind mehr als 60% des Lichtstromes dieser Leuchte nach oben gerichtet.In Fig. 1 the free beam angle of the lamp 1 is entered; the upper free jet angle is designated a and is considerably larger than the lower free jet angle designated β. This is also expressed in the light distribution curve shown in FIG. 2: the part directed upwards sweeps over a much wider area than the part directed downwards; accordingly, more than 60% of the luminous flux of this lamp is directed upwards.

Claims (8)

1. A pendant light-fitting having upper (21) and lower (22) light outlet apertures for a rod-shaped lamp (1) which radiates evenly in all directions during operation, and is horizontally arranged between said outlet apertures;
- having two side reflectors (3);
-- each side reflector having a lower mirror (32) which radiates through the lower light outlet aperture (22), overlaid by an upper mirror (31) bordering on the lower mirror (32) at a boundary edge (30) to radiate through the upper light outlet aperture (21);
-- the side reflectors (3) being arranged parallel to the lamp (1) on each side thereof, whereby:
. the lower mirrors (32) radiate crosswise,
. the upper free beam angle (a) is at least as large as the lower free beam angle (β), where this free beam angle lies between the boundary beams at the edges of the upper and lower light outlet apertures which are simultaneously tangents to the lamp enclosing it between them,

characterised in
- that the boundary edge (30) of each side reflector (3) lies in or below the lower horizontal tangential plane of the lamp (1);
- that the upper mirrors (31) also radiate crosswise;
- that the lamp (1) is arranged at such a height and the upper mirrors (31) are so designed that the maximum of the light distribution curve produced thereby is below 130°,
- and that transverse lamellae (4) are arranged between the lower mirrors (32) in the lower light outlet aperture (22).
2. A pendant light-fitting as claimed in Claim 1, characterised in that the maximum of the light distribution curve of the upper mirrors (31) lies at 120°.
3. A pendant light-fitting as claimed in one of Claims 1 or 2, characterised by two lamps (1, 1') arranged beside one another in parallel between the two reflectors (3) and between which is arranged a central reflector (5) with a V-shaped cross-section formed by two auxiliary mirrors (51).
4. A pendant light-fitting as claimed in Claim 3, characterised in that the horizontal distance (A) of the plane of symmetry (S) of light-fitting and central mirror (5) from the centre point (M) of each lamp (1, 1') and the vertical distance (B) of said centre point from the horizontal plane, which extends through the lower edge (50) of the central mirror (5), is so dimensioned that the screening angle (y') of each lamp determined thereby is identical to or smaller than the opposite screening angle (γ) formed by a lower mirror (32).
5. A pendant light-fitting as claimed in Claim 4, characterised in that the lower edge (50) of the central mirror (5) extends to the transverse lamellae (4).
6. A pendant light-fitting as claimed in one of Claims 3 to 5, characterised in that the upper edge of each auxiliary mirror (51) extends at the most to the horizontal plane which extends through the central point (M) of each lamp (1, 1').
7. A pendant light-fitting as claimed in Claim 6, characterised in that the maximum of the light distribution curve produced by each auxiliary mirror (51) lies at 120°.
8. A pendant light-fitting as claimed in Claim 6, characterised in that each auxiliary mirror (51 ) forms a parabola whose main axis extends below 20° to the vertical through the central point (M) of a lamp (1).
EP81109267A 1981-03-27 1981-10-29 Pendant lighting fixture Expired EP0061527B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109267T ATE11693T1 (en) 1981-03-27 1981-10-29 PENDANT LAMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813112253 DE3112253A1 (en) 1981-03-27 1981-03-27 PENDANT LAMP
DE3112253 1981-03-27

Publications (2)

Publication Number Publication Date
EP0061527A1 EP0061527A1 (en) 1982-10-06
EP0061527B1 true EP0061527B1 (en) 1985-02-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109267A Expired EP0061527B1 (en) 1981-03-27 1981-10-29 Pendant lighting fixture

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EP (1) EP0061527B1 (en)
AT (1) ATE11693T1 (en)
DE (1) DE3112253A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001839A1 (en) * 1990-01-23 1991-07-25 Adp Automaten Gmbh Suspended lighting unit - has side panels transmitting light and with advertising information

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3346786A1 (en) * 1983-12-23 1985-08-22 Maschinenfabrik Georg Kiefer Gmbh, 7000 Stuttgart Pendant luminaire
DE4413070A1 (en) * 1994-04-15 1995-10-19 Thorn Licht Gmbh Workplace lamp
EP1259756A2 (en) * 2000-02-29 2002-11-27 LT-LICHT-TECHNIK GmbH Reflector arrangement for a lamp
DE102014119616A1 (en) 2014-12-23 2016-06-23 Siteco Beleuchtungstechnik Gmbh LED lens body for generating a direct and indirect light component

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US2341895A (en) * 1940-07-12 1944-02-15 Morris B Beck Fluorescent tube lighting fixture
FR1074976A (en) * 1953-02-21 1954-10-11 Lighting device to prevent glare and control the light flow
US3158327A (en) * 1961-09-15 1964-11-24 Herst Lighting Corp Fluorescent lighting unit
DE1963881A1 (en) * 1969-12-20 1971-06-24 Licentia Gmbh Luminaire with reflective coating fluorescent lamp
DE7910659U1 (en) * 1979-04-11 1979-07-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen SUSPENSION LAMP WITH PARTIAL LIGHTING UPWARDS
DE3014336A1 (en) * 1980-04-15 1981-10-22 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Upwards and downwards radiating light fitting - has cover for fully open upper side, which comprises prismatic section on which reflectors focus lamp light

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001839A1 (en) * 1990-01-23 1991-07-25 Adp Automaten Gmbh Suspended lighting unit - has side panels transmitting light and with advertising information

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Publication number Publication date
DE3112253A1 (en) 1982-10-28
EP0061527A1 (en) 1982-10-06
DE3112253C2 (en) 1987-06-04
ATE11693T1 (en) 1985-02-15

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