GB664004A - Improvements in or relating to lighting installations - Google Patents

Improvements in or relating to lighting installations

Info

Publication number
GB664004A
GB664004A GB2318549A GB2318549A GB664004A GB 664004 A GB664004 A GB 664004A GB 2318549 A GB2318549 A GB 2318549A GB 2318549 A GB2318549 A GB 2318549A GB 664004 A GB664004 A GB 664004A
Authority
GB
United Kingdom
Prior art keywords
unit
ceiling
fluorescent
incandescent
bolted
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
Application number
GB2318549A
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.)
Holophane Corp
Original Assignee
Holophane Corp
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 Holophane Corp filed Critical Holophane Corp
Priority to GB2318549A priority Critical patent/GB664004A/en
Publication of GB664004A publication Critical patent/GB664004A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

664,004. Ceiling lighting installation. HOLOPHANE, Ltd. (Holophane Co., Inc.). Sept. 7, 1949, No. 23185/49. Class 75(iv) Alighting installation recessed into a ceiling comprises at least one fluorescent lamp unit suspended from permanent supports in the ceiling and at least one incandescent lamp unit secured to the end of the fluorescent unit. A lamp unit comprising a trough-shaped sheet metal casing 14 containing fluorescent lamps 13 and closed by a dished front glass 12 with longitudinal prisms on its lower side is secured in a recess in the ceiling 10 so that longitudinal flanges 19 on the casing contact the edges of the recess from below. The securing means comprises yokes 15 on the casing which are bolted to brackets 16 secured to ceiling channels and which have a plurality of bolt holes to permit vertical adjustment. The incandescent lamp unit comprises an inverted sheet metal box 26 closed by a lens plate 33 supported by a U-sectioned frame 27 disposed around the mouth of the box and providing a horizontal platform 28 which is bolted at 44 to an L-bracket 21 secured to an end plate 20 of the fluorescent unit so that its horizontal part is slightly above the ceiling. A cast metal member 40 for filling the gap between the frame 27 and the adjacent end of the fluorescent unit is bolted at its upper part to the platform 28 and the incandescent unit is drawn upwardly by the bolts 44 until a flange 41 on the filling member 40 abuts the flanges 19 on the fluorescent unit. A symmetrical reflector 37 or an adjustable reflector and lamp combination as described in Specification 618,712 may be fitted within the incandescent unit or the unit may comprise a fixed lamp and reflector adapted to illuminate elongated areas with a lens system projecting a divergent beam inclined to the vertical as described in U.S.A. Specification 2,280,160. Several units of each kind may be arranged in various patterns, thus a straight line, an L or a T or a cross pattern may be formed. That side of an incandescent unit which is not positioned alongside the end of a fluorescent unit is bolted to a strap provided in the ceiling.
GB2318549A 1949-09-07 1949-09-07 Improvements in or relating to lighting installations Expired GB664004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2318549A GB664004A (en) 1949-09-07 1949-09-07 Improvements in or relating to lighting installations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2318549A GB664004A (en) 1949-09-07 1949-09-07 Improvements in or relating to lighting installations

Publications (1)

Publication Number Publication Date
GB664004A true GB664004A (en) 1951-01-02

Family

ID=10191521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2318549A Expired GB664004A (en) 1949-09-07 1949-09-07 Improvements in or relating to lighting installations

Country Status (1)

Country Link
GB (1) GB664004A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145809A (en) * 1983-08-29 1985-04-03 Canadian Patents Dev Lightning panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145809A (en) * 1983-08-29 1985-04-03 Canadian Patents Dev Lightning panel

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