EP0286890A2 - Ecran pour armature à lampe fluorescente - Google Patents

Ecran pour armature à lampe fluorescente Download PDF

Info

Publication number: EP0286890A2
Authority: EP; European Patent Office
Prior art keywords: transverse; longitudinal; lamella; groove; sections
Prior art date: 1987-04-13
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.): Granted

Application number

EP88104820A

Other languages

German (de)

English (en)

Other versions

EP0286890B1 (fr

EP0286890A3 (en

Inventor

Georg Ing. Kempter

Siegfried Dipl.-Ing. Höfle

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Zumtobel AG

Original Assignee

Zumtobel AG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1987-04-13

Filing date

1988-03-25

Publication date

1988-10-19

1988-03-25 Application filed by Zumtobel AG filed Critical Zumtobel AG

1988-10-19 Publication of EP0286890A2 publication Critical patent/EP0286890A2/fr

1989-11-29 Publication of EP0286890A3 publication Critical patent/EP0286890A3/de

1992-09-02 Application granted granted Critical

1992-09-02 Publication of EP0286890B1 publication Critical patent/EP0286890B1/fr

2008-03-25 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
- F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
- 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 grid for fluorescent lamp lights with longitudinal slats and transverse slats arranged at right angles thereto according to the preamble of claim 1.
Grids of this type are known from AT-PS 379 228 and DE-GM 85 08 740 also shows a similar construction.
the lamellas of this grid have smooth reflecting surfaces over their height and the embossed groove provided at the front end of the transverse lamella positively takes on the edge of the cutout of the longitudinal lamella, on the one hand making the grid as a whole more stable and on the other hand preventing these "seams" from being prevented a gap is formed through which the light emitted by the lamp can fall.
the longitudinal and transverse lamellas of such grids are made of thin aluminum sheets and the grid as a whole is a very unstable component, in which internal stresses result from mechanical stress as well as thermal expansion, which lead to, even if only small, deformations that the formation of gaps at the "seams" mentioned cannot be ruled out unless appropriate countermeasures are taken. Through such gaps, the light emitted by the lamp can fall outside. This can lead to effects that the viewer finds annoying.
precautions have been successfully taken with the known constructions mentioned above, but the slats used for these grids are those which have a smooth reflecting surface over their entire height.
the invention now proposes that those measures be taken with a grid of the type mentioned at the beginning of the characterizing part of claim 1. Despite the surfaces of the slats designed in this way the edge of the incision of the longitudinal lamella can be accommodated in such a way that a gap is avoided and so no light falls outwards in an uncontrolled manner.
FIG. 1 shows a grid seen from below
Fig. 2 shows the grid of Figure 1, seen obliquely from below
Figure 3 shows the front end of a transverse lamella in view
4 shows a cross section along the line IV - IV in Fig. 3.
5 shows the end of a transverse lamella according to FIG. 3, but on an enlarged scale compared to this figure and in an oblique view
Fig. 6 shows a longitudinal section through the groove at the front end of the transverse lamella and on a significantly enlarged scale compared to Fig. 3.
FIG. 1 and 2 illustrate a simple grid for a single-lamp fluorescent lamp, with FIG. 1 showing a partial bottom view.
This grid consists of two mutually parallel and spaced apart longitudinal slats 1. These two longitudinal slats 1 are now connected to one another by a plurality of mutually parallel and also spaced apart transverse slats 2.
the fluorescent lamp 3 is located above these transverse lamellae 2 and in the center thereof.
the longitudinal and transverse lamellae 1 and 2 are formed from thin metal sheets and have a refined, preferably mirrored surface.
the cross-sectional shape of the longitudinal lamella 1 can be seen directly from FIG. 2; the cross-sectional shape of the transverse lamella is shown in Fig. 4, from which it can be seen that this transverse lamella is formed from a sheet metal strip bent essentially in a U-shape.
this transverse lamella 2 has no smooth surface over height, rather its surface is divided by prismatic or wedge-shaped sections 4, these individual sections being able to form 4 parabolic surfaces.
These individual sections 4 show different heights h over the height H of the transverse lamella 2, these heights h of these sections 4 decreasing from the bottom to the top.
the edges 5 and 6 which delimit these sections 4 lie essentially parallel to the Plane of the grid, in FIG. 1 thus parallel to the plane of the drawing.
the end configuration of the transverse lamella can be seen in FIG. 3.
An incision 11 is provided on the front side and on the lower edge, from which a groove 7 extends upwards to the upper edge 12, which corresponds to the curvature of the longitudinal lamella 1 with regard to its longitudinal profile.
a shoulder 13 forms a shoulder-shaped stop.
the groove 7 now has no continuous, flat groove base, but rather several openings 8 over its length. These openings 8 each lie in the area of the joint of adjacent sections 4.
the openings 8 are used to divide the groove base into webs 9, which is clearly shown by the longitudinal section according to FIG. 6 shows through the groove 7 on a greatly enlarged scale compared to the other figures.
These webs 9 are spaced apart from one another by the openings 8. From FIG. 6 it can be seen that these webs 9 run essentially parallel to the surfaces of the sections 4 which are laterally adjacent to them. If the edges 6 of the successive sections 4 lying on the valley side are connected to one another, these imaginary connecting lines form a plane E which is at right angles in FIG. 6 on the drawing plane.
the webs 9 or the openings 8 are now dimensioned and designed such that the outermost edge 10 of the portions of the webs 9 delimiting the openings 8, which are adjacent to the outer sides of the transverse lamellae, are arranged in or behind this plane 4, as seen from the outside of the slat 2 (direction of view arrow A). If the outermost edges 10 of the webs 9 are mentioned here, the object of the invention is those edges which delimit the opening 8 and which have the greatest distance from an imaginary central plane M of the transverse lamella 2.
each web 9 has two outer edges, the distance of which from the imaginary center plane M of the transverse lamella 2 is different.
the line labeled E also represents the boundary edge of the indentation or cutout provided in the longitudinal lamella for receiving the front end of the transverse lamella 2. 6 makes it clear that the gap formation mentioned at the outset is successfully avoided here, in spite of the prismatic or wedge-shaped surface of the lamella 2.
the longitudinal slats 1 have a smooth surface. It is also within the scope of the invention to design the longitudinal lamella 1 or its surfaces in the manner as explained above in connection with the transverse lamellae.

Landscapes

Engineering & Computer Science (AREA)
General Engineering & Computer Science (AREA)
Non-Portable Lighting Devices Or Systems Thereof (AREA)
Vessels And Coating Films For Discharge Lamps (AREA)

EP88104820A 1987-04-13 1988-03-25 Ecran pour armature à lampe fluorescente Expired - Lifetime EP0286890B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
AT916/87		1987-04-13
AT0091687A AT386471B (de)	1987-04-13	1987-04-13	Raster fuer leuchtstofflampenleuchten

Publications (3)

Publication Number	Publication Date
EP0286890A2 true EP0286890A2 (fr)	1988-10-19
EP0286890A3 EP0286890A3 (en)	1989-11-29
EP0286890B1 EP0286890B1 (fr)	1992-09-02

Family

ID=3502778

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP88104820A Expired - Lifetime EP0286890B1 (fr)	1987-04-13	1988-03-25	Ecran pour armature à lampe fluorescente

Country Status (3)

Country	Link
EP (1)	EP0286890B1 (fr)
AT (1)	AT386471B (fr)
DE (1)	DE3874182D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2004088203A1 (fr)	2003-04-03	2004-10-14	Zumtobel Staff Gmbh	Element influant sur la lumiere

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2743406B1 (fr) *	1996-01-10	1998-04-03	Vial Henri Noel	Perfectionnement aux grilles de defilement pour eclairage de type fluorescent
NL1011025C2 (nl) *	1999-01-14	2000-07-17	Juliette Simone Catharina Van	Verlichtingsarmatuur.
WO2000066948A1 (fr)	1999-04-28	2000-11-09	Koninklijke Philips Electronics N.V.	Luminaire dote de lamelles a changement graduel de profil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2460115B2 (de) *	1974-12-19	1977-12-22	Trilux - Lenze Gmbh + Co Kg, 5760 Arnsberg	Rasterabdeckung mit im wesentlichen ebenen gekreuzten lamellen fuer langgestreckte leuchtstofflampen
FR2298057A1 (fr) *	1975-01-17	1976-08-13	Cegedur	Paralume presentant une bonne tenue au feu
DE2648961A1 (de) *	1976-10-28	1977-11-03	Trilux Lenze Gmbh & Co Kg	Rasterabdeckung mit im wesentlichen ebenen gekreuzten lamellen fuer langgestreckte leuchtstofflampen
FR2485691A1 (fr) *	1980-06-24	1981-12-31	Cetek Const Electrotechni Cent	Grille reflechissante pour luminaire
AT379228B (de) *	1984-03-06	1985-12-10	Zumtobel Ag	Raster fuer leuchtstofflampenleuchten
DE8508740U1 (de) *	1985-03-23	1985-05-15	Zumtobel Ag, Dornbirn	Raster für Leuchtstofflampenleuchten

1987
- 1987-04-13 AT AT0091687A patent/AT386471B/de not_active IP Right Cessation
1988
- 1988-03-25 EP EP88104820A patent/EP0286890B1/fr not_active Expired - Lifetime
- 1988-03-25 DE DE8888104820T patent/DE3874182D1/de not_active Expired - Fee Related

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2004088203A1 (fr)	2003-04-03	2004-10-14	Zumtobel Staff Gmbh	Element influant sur la lumiere
EP2295851A2 (fr)	2003-04-03	2011-03-16	Zumtobel Staff GmbH	Elément influant sur la lumière

Also Published As

Publication number	Publication date
EP0286890B1 (fr)	1992-09-02
ATA91687A (de)	1988-01-15
EP0286890A3 (en)	1989-11-29
DE3874182D1 (de)	1992-10-08
AT386471B (de)	1988-08-25

Legal Events

Date	Code	Title	Description
1988-09-03	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1988-10-19	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): BE DE FR GB IT LU NL
1989-10-10	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1989-11-29	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): BE DE FR GB IT LU NL
1990-03-21	17P	Request for examination filed	Effective date: 19900118
1992-01-08	17Q	First examination report despatched	Effective date: 19911127
1992-07-17	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1992-09-02	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): BE DE FR GB IT LU NL
1992-10-08	REF	Corresponds to:	Ref document number: 3874182 Country of ref document: DE Date of ref document: 19921008
1992-11-13	ET	Fr: translation filed
1992-11-26	ITF	It: translation for a ep patent filed
1993-01-13	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19921214
1993-03-03	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: LU Payment date: 19930303 Year of fee payment: 6
1993-05-13	EPTA	Lu: last paid annual fee
1993-07-03	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1993-07-03	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1993-08-25	26N	No opposition filed
1994-03-25	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19940325
1995-03-15	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19950315 Year of fee payment: 8
1995-03-21	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: BE Payment date: 19950321 Year of fee payment: 8
1995-03-29	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19950329 Year of fee payment: 8
1995-03-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 19950331 Year of fee payment: 8
1995-05-18	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19950518 Year of fee payment: 8
1996-03-25	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19960325
1996-03-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: BE Effective date: 19960331
1996-09-30	BERE	Be: lapsed	Owner name: ZUMTOBEL A.G. Effective date: 19960331
1996-10-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19961001
1996-11-13	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19960325
1996-11-29	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Effective date: 19961129
1996-12-02	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee	Effective date: 19961001
1996-12-03	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19961203
1997-01-31	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST
2005-03-25	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050325

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