EP0061527A1 - Pendant lighting fixture - Google Patents

Pendant lighting fixture Download PDF

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Publication number
EP0061527A1
EP0061527A1 EP81109267A EP81109267A EP0061527A1 EP 0061527 A1 EP0061527 A1 EP 0061527A1 EP 81109267 A EP81109267 A EP 81109267A EP 81109267 A EP81109267 A EP 81109267A EP 0061527 A1 EP0061527 A1 EP 0061527A1
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EP
European Patent Office
Prior art keywords
lamp
mirror
center
mirrors
pendant
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Granted
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EP81109267A
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German (de)
French (fr)
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EP0061527B1 (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
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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 according to the upper handle of claim 1.
  • Such a pendant lamp known from DE-Gbm 79 10 659 was distinguished by very good shielding and - thanks to the reflecting reflectors - by a high luminaire operating efficiency.
  • the shielding angle - measured against the horizontal - is equal to or greater than 30 ° to 40 °; it indicates the area in which the luminance of the luminaire is below 200 cd per m 2 .
  • part of the luminous flux of the lamp emerges through two upper light outlet openings arranged laterally from it and serves to brighten the ceiling, which is spaced 50 to 60 cm above the luminaire.
  • Lighting efficiency is understood to mean the ratio of the luminous flux hitting the useful plane to the sum of the luminous fluxes of all lamps installed in the lighting system.
  • the invention has for its object to develop a pendant lamp of the type mentioned with good shielding and reflecting reflectors so that a much higher lighting efficiency can be achieved ..
  • 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 the previous assumptions of the professional world, this means that lighting efficiency can be achieved which is even higher in rooms with a K value greater than 1.5 than in a system with only downward-shining, equally shielded mirror lights!
  • the K value is a parameter of the room dimensions and is 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 is met for an area larger than 50 m 2 . In smaller rooms - common single rooms - the same lighting efficiency can still be achieved as with exclusively direct-luminaires.
  • the unexpectedly high lighting efficiency is primarily a result of the very high lighting efficiency, which is over 88% here.
  • Directly radiating mirror lights on the other hand, have a lighting operation efficiency of only about 70 to 72%. The reason for this is that the upward luminous flux of the lamp can only be directed to the plane of use with relatively large losses.
  • the pendant lamp has a housing 2 with a frame 20, within each of which a side reflector 3 is arranged on opposite longitudinal walls; each of these side reflectors consists of a sub-mirror 32, which ends at the top in a border edge 30, which adjoins then an oppositely curved upper mirror 31 connects.
  • the upper and lower mirrors of opposite side reflectors are bent so that they radiate crosswise through the upper light exit opening 21 and through the lower light exit opening 22, respectively.
  • each side reflector has essentially the same course as known darklight mirrors; it is therefore 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 adjoining it runs essentially on a circle with the radius R, the center point N of which passes through the center of the lamp 1 Vertical plane and 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 exit opening like the lower one, extends over 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.
  • 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 symmetry plane 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 /.
  • the auxiliary mirror 51 ends at the top somewhat below the horizontal plane passing through the center M of the lamp.

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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 gemäß Obergriff von Anspruch 1.The invention relates to a pendant lamp according to the upper handle of claim 1.

Eine derartige, aus dem DE-Gbm 79 10 659 bekannte.Pendelleuchte zeichnete sich durch eine sehr gute Abschirmung und - dank der spiegelnden Reflektoren - durch einen hohen Leuchtenbetriebswirkungsgrad aus. Der Abschirmwinkel - gemessen gegen die Horizontale - ist hierbei gleich oder größer 30° bis 40°; er-gibt den Bereich an, in dem die Leuchtdichte der Leuchte unter 200 cd pro m2 liegt.Such a pendant lamp known from DE-Gbm 79 10 659 was distinguished by very good shielding and - thanks to the reflecting reflectors - by a high luminaire operating efficiency. The shielding angle - measured against the horizontal - is equal to or greater than 30 ° to 40 °; it indicates the area in which the luminance of the luminaire is below 200 cd per m 2 .

Bei der bekannten Leuchte tritt ein Teil des Lichtstromes der Lampe durch zwei seitlich von ihr angeordnete obere Lichtaustrittsöffnungen aus und dient der Aufhellung der im Abstand von 50 bis 60 cm über der Leuchte verlaufenden Decke.In the known luminaire, part of the luminous flux of the lamp emerges through two upper light outlet openings arranged laterally from it and serves to brighten the ceiling, which is spaced 50 to 60 cm above the luminaire.

Der Beleuchtungswirkungsgrad einer mit derartigen Leuchten ausgerüsteten Anlage liegt niedriger als bei einer Vergleichsanlage mit nur nach unten strahlenden, in gleicher Weise abgeschirmten Spiegelleuchten. Unter Beleuchtungswirkungsgrad ist dabei das Verhältnis aus dem die Nutzebene treffenden Lichtstrom zu der Summe der Lichtströme aller in der Beleuchtungsanlage installierten Lampen zu verstehen.The lighting efficiency of a system equipped with such lights is lower than that of a comparison system with only downward-radiating mirror lights which are shielded in the same way. Lighting efficiency is understood to mean the ratio of the luminous flux hitting the useful plane to the sum of the luminous fluxes of all lamps installed in the lighting system.

Die aus anderen Gründen gewünschte Aufhellung der Decke führt somit zu einer ungünstigeren Energienutzung; dieser Nachteil haftet nach bisheriger einhelliger Auffassung der Fachwelt jeder derartigen Beleuchtungsanlage mit Indirektanteil an.The brightening of the ceiling desired for other reasons thus leads to less favorable use of energy; according to the previous unanimous opinion, this disadvantage is liable the professional world of any such lighting system with an indirect component.

Der Erfindung liegt die Aufgabe zugrunde, eine Pendelleuchte der eingangs genannten Art mit guter Abschirmung und spiegelnden Reflektoren so weiterzubilden, daß sich ein wesentlich höherer Beleuchtungswirkungsgrad erzielen läßt..The invention has for its object to develop a pendant lamp of the type mentioned with good shielding and reflecting reflectors so that a much higher lighting efficiency can be achieved ..

Die erfindungsgemäße Lösung dieser Aufgabe ist dabei durch die im Kennzeichen von Anspruch 1 angegebenen Merkmale charakterisiert.The solution to this problem according to the invention is characterized by the features specified in the characterizing part of claim 1.

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 liegt! 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 Beleuchtungswir- kungsgrad 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 the previous assumptions of the professional world, this means that lighting efficiency can be achieved which is even higher in rooms with a K value greater than 1.5 than in a system with only downward-shining, equally shielded mirror lights! The K value is a parameter of the room dimensions and is 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 is met for an area larger than 50 m 2 . In smaller rooms - common single rooms - the same lighting efficiency can still be achieved as with exclusively direct-luminaires.

Der unerwartet hohe Beleuchtungswirkungsgrad ist vor allem eine Folge des sehr hohen Leuchtenbetriebswirkungsgrades, der hier über 88% liegt. Direkt strahlende Spiegelleuchten haben dagegen einen Leuchtenbetriebswirkungsgrad von nur etwa 70 bis 72%. Das liegt daran, daß hier der nach oben gerichtete Lichtstrom der Lampe nur unter verhältnismäßig großen Verlusten auf die Nutzebene lenkbar ist.The unexpectedly high lighting efficiency is primarily a result of the very high lighting efficiency, which is over 88% here. Directly radiating mirror lights, on the other hand, have a lighting operation efficiency of only about 70 to 72%. The reason for this is that the upward luminous flux of the lamp can only be directed to the plane of use with relatively large losses.

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 einer zweilampigen 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. Here, the lamps can move so close to this central mirror that there is at least the same shielding angle as with 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
  • 1 shows a cross section through a pendant lamp symmetrical to the plane of symmetry S and
  • 2 shows the associated light distribution curve in the plane of FIG.

Die Pendelleuchte weist ein Gehäuse 2 mit einem Rahmen 20 auf, innerhalb dessen an gegenüberliegenden Längswänden 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 die obere Lichtaustrittsöffnung 21 bzw. durch die untere Lichtaustrittsöffnung 22 strahlen.The pendant lamp has a housing 2 with a frame 20, within each of which a side reflector 3 is arranged on opposite longitudinal walls; each of these side reflectors consists of a sub-mirror 32, which ends at the top in a border edge 30, which adjoins then an oppositely curved upper mirror 31 connects. The upper and lower mirrors of opposite side reflectors are bent so that they radiate crosswise through the upper light exit opening 21 and through the 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 therefore 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 Ober-spiegel 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 adjoining it runs essentially on a circle with the radius R, the center point N of which passes through the center of the lamp 1 Vertical plane and 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 Lichtaustrittsebene 21 sind zwei röhrenförmige Leuchtstofflampen 1, 1' 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. 1' geht und mit der Vertikalen einen.Winkel von 20° einschließt.In the lower light exit opening 22 transverse slats 4 are arranged in a known form between the lower mirrors. The upper light exit opening, like the lower one, extends over the entire width of the housing 2. Two tubular fluorescent lamps 1, 1 'are arranged just below the upper light exit plane 21, at the same distance A from the axis of symmetry S of the lamp, between which a center mirror 5 is located. 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.

Der Abstand A des Mittelpunktes M jeder Lampe von der Symmetriebene 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 /.The distance A from the center M of each lamp from the symmetry plane 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 /.

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 α bezeichnet und erheblich größer als der mit β bezeichnete untere Freistrahlwinkel. Das kommt auch in der in FIG 4 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 Figure 1, the free beam angle of the lamp 1 is entered; the upper free jet angle is labeled α and considerably larger than the lower free jet angle labeled β. This is also expressed in the light distribution curve shown in FIG. 4: 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 (9)

1. Pendelleuchte für eine stabförmige Lampe (1) mit zwei zu beiden Seiten der Lampe und parallel zu ihr angeordneten Seitenreflektoren (2), von denen jeder einen durch eine untere Lichtaustrittsöffnung (22) strahlenden Unterspiegel (32) und darüber einen durch eine obere Lichtaustrittsöffnung (21) strahlenden Oberspiegel (31) aufweist, wobei die Unterspiegel (32) über Kreuz strahlen und mit Querlamellen (4) . zwischen den Unterspiegeln (32), dadurch - gekennzeichnet , daß sich die obere Lichtaustrittsöffnung (21) über die Lampe (1, 1') hinwegerstreckt, daß die Lampe so hoch angeordnet ist, daß der obere Freistrahlwinkel(α)mindestens so groß ist wie der untere Freistrahlwinkel (β), daß auch die Oberspiegel (31) über Kreuz strahlen und das Maximum der von ihnen erzeugten Lichtverteilungskurve unter 1300 liegt.1. pendant lamp for a rod-shaped lamp (1) with two on both sides of the lamp and parallel to it arranged side reflectors (2), each of which has a lower mirror (32) shining through a lower light exit opening (22) and above one through an upper light exit opening (21) has a radiating upper mirror (31), the lower mirror (32) radiating crosswise and with transverse slats (4). between the lower mirrors (32), characterized in that the upper light exit opening (21) extends beyond the lamp (1, 1 '), that the lamp is arranged so high that the upper free beam angle (α) is at least as large as the lower free beam angle (β) that the top mirrors (31) also radiate crosswise and the maximum of the light distribution curve generated by them is below 130 0 . 2. Pendelleuchte nach Anspruch 1, dadurch gekennzeichnet , daß die Grenzkante(30) zwischen. Unter- und Oberspiegel (32, 31) in oder unter der unteren horizontalen Tangentialebene an die Lampe liegt.2. Pendant lamp according to claim 1, characterized in that the boundary edge (30) between. Bottom and top mirror (32, 31) in or below the lower horizontal tangential plane to the lamp. 3. Pendelleuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Maximum der Lichtverteilungskurve der Oberspiegel(31) bei 120° liegt.3. Pendant lamp according to claim 1 or 2, characterized in that the maximum of the light distribution curve of the upper mirror (31) is 120 °. 4. Pendelleuchte nach einem der Ansprüche 1 bis 3, gekennzeichnet durch zwei parallel nebeneinander zwischen den beiden Reflektoren (3) liegende Lampen (1, 1'), zwischen denen ein Mittenspiegel (5) mit V-förmigem, von zwei Hilfsspiegeln (51) gebildeten Querschnitt angeordnet ist.4. Pendant lamp according to one of claims 1 to 3, characterized by two parallel side by side between the two reflectors (3) lying lamps (1, 1 '), between which a center mirror (5) with a V-shaped, of two auxiliary mirrors (51) formed cross section is arranged. 5. Pendelleuchte nach Anspruch 4, dadurch gekennzeichnet , daß der Horizontalabstand (A) der Symmetriebene (S) von Leuchte und Mittenspiegel (5) von dem Mittelpunkt (M) jeder Lampe (1, 1') sowie dessen Vertikalabstand (B) von der durch die Unterkante (50) des Mittenspiegels gehenden Horizontalebene so bemessen sind, daß der dadurch bestimmte Abschirmwinkel (γ") jeder Lampe gleich oder kleiner ist als der gegenüberliegende, durch einen Unterspiegel (32) gegebene Abschirmwinkel (γ).5. Pendant lamp according to claim 4, characterized in that the horizontal distance (A) of the plane of symmetry (S) of the lamp and center mirror (5) from the center (M) of each lamp (1, 1 ') and its vertical distance (B) from the through the lower edge (50) of the center plane horizontal plane are dimensioned such that the thereby determined screening angle (γ ") of each lamp is equal to or smaller than the opposite screening angle (γ) given by a bottom mirror (32). 6. Pendelleuchte nach Anspruch 5, dadurch gekennzeichnet , daß der Mittenspiegel (5) bis an die Querlamellen (4) reicht.6. Pendant lamp according to claim 5, characterized in that the center mirror (5) extends to the transverse slats (4). 7. Pendelleuchte nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet , daß jeder Hilfsspiegel höchstens bis an die durch den Mittelpunkt (M) jeder Lampe (1, 1') verlaufende Horizontalebene reicht.7. Pendant lamp according to one of claims 4 to 6, characterized in that each auxiliary mirror extends at most to the horizontal plane extending through the center point (M) of each lamp (1, 1 '). 8. Pendelleuchte nach Anspruch 7, dadurch gekennzeichnet , daß das.Maximum der von jedem Hilfsspiegel (51) erzeugten Lichtverteilungskurve bei 120° liegt.8. Pendant lamp according to claim 7, characterized in that the maximum of the light distribution curve generated by each auxiliary mirror (51) is 120 °. 9. Pendelleuchte nach Anspruch 7, dadurch gekennzeichnet , daß jeder Hilfsspiegel (51) nach einer Parabel verläuft, deren Hauptachse unter 200 durch den Mittelpunkt (M) einer Lampe (1) verläuft.9. Pendant lamp according to claim 7, characterized in that each auxiliary mirror (51) runs according to a parabola whose main axis runs below 20 0 through the center (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
DE3112253 1981-03-27
DE19813112253 DE3112253A1 (en) 1981-03-27 1981-03-27 PENDANT LAMP

Publications (2)

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

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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 (3)

* 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
EP0677697A1 (en) * 1994-04-15 1995-10-18 THORN LICHT GmbH Workplace light fixture
WO2001065171A3 (en) * 2000-02-29 2002-02-28 Lt Licht Technik Gmbh Reflector arrangement for a lamp

Families Citing this family (2)

* 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
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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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

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FR1074976A (en) * 1953-02-21 1954-10-11 Lighting device to prevent glare and control the light flow
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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

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DE3346786A1 (en) * 1983-12-23 1985-08-22 Maschinenfabrik Georg Kiefer Gmbh, 7000 Stuttgart Pendant luminaire
EP0677697A1 (en) * 1994-04-15 1995-10-18 THORN LICHT GmbH Workplace light fixture
WO2001065171A3 (en) * 2000-02-29 2002-02-28 Lt Licht Technik Gmbh Reflector arrangement for a lamp

Also Published As

Publication number Publication date
DE3112253A1 (en) 1982-10-28
EP0061527B1 (en) 1985-02-06
ATE11693T1 (en) 1985-02-15
DE3112253C2 (en) 1987-06-04

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