GB664004A - Improvements in or relating to lighting installations - Google Patents
Improvements in or relating to lighting installationsInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145809A (en) * | 1983-08-29 | 1985-04-03 | Canadian Patents Dev | Lightning panel |
-
1949
- 1949-09-07 GB GB2318549A patent/GB664004A/en not_active Expired
Cited By (1)
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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