EP0307758A2 - Leuchtengehäuse - Google Patents

Leuchtengehäuse Download PDF

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Publication number
EP0307758A2
EP0307758A2 EP88114485A EP88114485A EP0307758A2 EP 0307758 A2 EP0307758 A2 EP 0307758A2 EP 88114485 A EP88114485 A EP 88114485A EP 88114485 A EP88114485 A EP 88114485A EP 0307758 A2 EP0307758 A2 EP 0307758A2
Authority
EP
European Patent Office
Prior art keywords
section
cross
troffer
lenticular
lighting fixture
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.)
Granted
Application number
EP88114485A
Other languages
English (en)
French (fr)
Other versions
EP0307758A3 (en
EP0307758B1 (de
Inventor
Howard A. Anderson
Robert W. Carroll
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.)
Bayer Corp
Original Assignee
Mobay Corp
Miles Inc
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.)
Filing date
Publication date
Application filed by Mobay Corp, Miles Inc filed Critical Mobay Corp
Publication of EP0307758A2 publication Critical patent/EP0307758A2/de
Publication of EP0307758A3 publication Critical patent/EP0307758A3/en
Application granted granted Critical
Publication of EP0307758B1 publication Critical patent/EP0307758B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/013—Housings, e.g. material or assembling of housing parts the housing being an extrusion
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • 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
    • F21V27/00—Cable-stowing arrangements structurally associated with lighting devices, e.g. reels 
    • 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 is directed to a troffer and more particularly to a troffer made from a thermoplastic resin.
  • Lighting fixtures comprising a housing - a troffer - for fluorescent lighting tubes are widely used. They are normally mounted on or suspended from the ceiling and are made of sheet metal. Attempts to have these made of thermoplastics have not hitherto been successful because the weight of the fixture and tubes exerts unacceptable bending stresses on the troffer making both installation and operation awkward. Design changes have been contemplated resulting in troffers which are difficult and too expensive to produce.
  • the lighting fixture of the invention comprises an elongate molded article which comprises a lenticular shaped cross section.
  • the lenticular cross section imparts to the troffer a high degree of stiffness and resistance to twisting.
  • the fixture may preferably be produced by extrusion of a suitable thermoplastic resin and may preferably be provided with suitable end caps. In a preferred embodiment electrical leads are embedded in the extruded part.
  • the lighting fixture of the present invention is a thermoplastically molded elongate article the cross section of which - across its long dimension - comprises a lens shaped - lenticular - portion.
  • the long article includes a reinforcing, hollow rib, running parallel to its long dimension, said rib having a lenticular cross section positioned perpendicular to the major axis of the elongate article.
  • FIG. 1 there is described the cross section of the troffer of the invention.
  • the lenticular section of the troffer is formed by joining the curved sections 1 and 2.
  • the flanges 3 and 4 form a reflector area the size of which is not critical to the invention.
  • One section of the profile is conveniently co-extruded with the second one and both are joined in the melt.
  • Electrical wires 5 may be embedded in the resin prior to joining to provide electrical connection to end cap fittings. Alternatively, wires may be fed through and along the lenticular void after the unit has been extruded.
  • the article of the invention is most readily produced by extrusion, it may also be produced by injection molding. Injection molded sections corresponding to 1 and 2 in Figure 2 may be produced and then joined by any of a number of methods known in the art, preferably sonic welding. Injection molding may advantageously be used in preparing lighting fixtures of the invention which comprises further complex geometrics, i.e. end caps.
  • thermoplastic resins suitable for preparing the elongate article of the invention a polycarbonate resin such as Makrolon (from Mobay Corporation) is preferred.
  • the lenticular cross section of the elongate article conforms to the shape which was disclosed in U.S. Patent 4,621,940 which is incorporated herein by reference. This structure was found to offer a high degree of resistance to bending yet permit such bending and repeated stressing without failure.
  • the two walls defining the lens portion of the cross section of the elongate article may be joined in any manner which substantially uniformly transfers stress from one to the other upon flexing or deflection of the article across its major axis in the plane of its minor axis.
  • the elongate article is extruded as a unitary shape.
  • the lens portion is made without the formation and the joining of two separate pieces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP88114485A 1987-09-17 1988-09-05 Leuchtengehäuse Expired - Lifetime EP0307758B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9811387A 1987-09-17 1987-09-17
US98113 1987-09-17

Publications (3)

Publication Number Publication Date
EP0307758A2 true EP0307758A2 (de) 1989-03-22
EP0307758A3 EP0307758A3 (en) 1990-03-14
EP0307758B1 EP0307758B1 (de) 1992-12-16

Family

ID=22267222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114485A Expired - Lifetime EP0307758B1 (de) 1987-09-17 1988-09-05 Leuchtengehäuse

Country Status (2)

Country Link
EP (1) EP0307758B1 (de)
DE (1) DE3876731T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392136A2 (de) * 1989-04-12 1990-10-17 R. Stahl Schaltgeräte GmbH Explosionsgeschützte Leuchte
EP0410582A1 (de) * 1989-07-26 1991-01-30 Light Years Ahead Limited Leuchte zum räumlichen Beleuchten
NL1000207C2 (nl) * 1995-04-24 1996-10-25 Spaanderman Im En Export B V Verlichtingsarmatuur van het trog-type.
EP1514970A1 (de) * 2003-09-11 2005-03-16 Pascal Lucchina Bewegbare Strassensperre

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3121577A1 (de) * 1981-05-30 1982-12-23 Achim 5451 Oberhonnefeld Wodrich Aquarienleuchte
US4621940A (en) * 1984-09-20 1986-11-11 Mobay Chemical Corporation Stiff but bendable elongated plastic article

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3121577A1 (de) * 1981-05-30 1982-12-23 Achim 5451 Oberhonnefeld Wodrich Aquarienleuchte
US4621940A (en) * 1984-09-20 1986-11-11 Mobay Chemical Corporation Stiff but bendable elongated plastic article

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392136A2 (de) * 1989-04-12 1990-10-17 R. Stahl Schaltgeräte GmbH Explosionsgeschützte Leuchte
EP0392136A3 (de) * 1989-04-12 1991-02-06 R. Stahl Schaltgeräte GmbH Explosionsgeschützte Leuchte
EP0410582A1 (de) * 1989-07-26 1991-01-30 Light Years Ahead Limited Leuchte zum räumlichen Beleuchten
US5093767A (en) * 1989-07-26 1992-03-03 Light Years Ahead Limited Space lighting fitting
NL1000207C2 (nl) * 1995-04-24 1996-10-25 Spaanderman Im En Export B V Verlichtingsarmatuur van het trog-type.
EP0740107A1 (de) * 1995-04-24 1996-10-30 Spaanderman Im- en Export B.V. Leuchtstoffröhrenarmatur mit Reflektor
EP1514970A1 (de) * 2003-09-11 2005-03-16 Pascal Lucchina Bewegbare Strassensperre
FR2859739A1 (fr) * 2003-09-11 2005-03-18 Pascal Lucchina Bras mobile notamment a usage routier ou autoroutier

Also Published As

Publication number Publication date
DE3876731T2 (de) 1993-04-22
EP0307758A3 (en) 1990-03-14
DE3876731D1 (de) 1993-01-28
EP0307758B1 (de) 1992-12-16

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