GB578627A - Improvements in or relating to luminescent tube lighting systems - Google Patents

Improvements in or relating to luminescent tube lighting systems

Info

Publication number
GB578627A
GB578627A GB9456/43A GB945643A GB578627A GB 578627 A GB578627 A GB 578627A GB 9456/43 A GB9456/43 A GB 9456/43A GB 945643 A GB945643 A GB 945643A GB 578627 A GB578627 A GB 578627A
Authority
GB
United Kingdom
Prior art keywords
tubes
series
condenser
windings
transformer
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
GB9456/43A
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.)
BOUCHER INV S Ltd
Original Assignee
BOUCHER INV S Ltd
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 BOUCHER INV S Ltd filed Critical BOUCHER INV S Ltd
Priority to GB9456/43A priority Critical patent/GB578627A/en
Publication of GB578627A publication Critical patent/GB578627A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

578,627. Supply systems for space discharge apparatus ; transformers. STEVENS, A. H. (Boucher Inventions, Ltd.) June 11, 1943, No. 9456. [Classes 38 (ii) and 38 (iv)] Luminescent tubes 12 mounted in a reflector 10 are energised by a transformer 13 housed in a casing 14 secured to the reflector and which also contains a condenser 27 for connecting in series with one or more of the tubes for power factor improvement or for introducing a phase difference between the currents taken by the tubes and thereby reducing flickering. The transformer comprises primaries P1, P2, connected in series, and secondaries S1, S2 either connected in series with each other and the two tubes, or each supplying individual tubes. The primary and secondary windings are mounted on cores 24, 25 respectively, held together by bands 26, 27, and magnetic shunts 28, 34 and 29, 35 are secured to the cores by clamps 40, 41 to limit the current supplied to the tubes. Fig. 7 shows a transformer 71 having secondary windings S9, S10 with a common earth connection 75 to the adjacent ends 78, 80 of luminescent tubes T9, T10, the free ends of the windings being connected to the other ends of the tubes, with the interposition of a phase shift condenser 77 in one connection. A condenser 81 and switch 83 is provided to facilitate starting. The supply 72 is connected to centre tappings on the series-connected primary windings P9, P10, the outer ends of which are connected to a power factor correction condenser 74. In modified circuits the earth connections 75, 78, 80 are replaced by separate connections between each secondary and its tube, and the tubes and secondary windings may alternate in a series circuit.
GB9456/43A 1943-06-11 1943-06-11 Improvements in or relating to luminescent tube lighting systems Expired GB578627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9456/43A GB578627A (en) 1943-06-11 1943-06-11 Improvements in or relating to luminescent tube lighting systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9456/43A GB578627A (en) 1943-06-11 1943-06-11 Improvements in or relating to luminescent tube lighting systems

Publications (1)

Publication Number Publication Date
GB578627A true GB578627A (en) 1946-07-05

Family

ID=9872306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9456/43A Expired GB578627A (en) 1943-06-11 1943-06-11 Improvements in or relating to luminescent tube lighting systems

Country Status (1)

Country Link
GB (1) GB578627A (en)

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