GB771591A - Improvements in or relating to electric lighting fittings for the operation of electric discharge lamps - Google Patents
Improvements in or relating to electric lighting fittings for the operation of electric discharge lampsInfo
- Publication number
- GB771591A GB771591A GB15804/52A GB1580452A GB771591A GB 771591 A GB771591 A GB 771591A GB 15804/52 A GB15804/52 A GB 15804/52A GB 1580452 A GB1580452 A GB 1580452A GB 771591 A GB771591 A GB 771591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- lamp
- circuit
- capacitor
- input terminal
- 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
-
- 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
- H05B41/22—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 having an auxiliary starting electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/48—Means forming part of the tube or lamp for the purpose of supporting it
-
- 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
- F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
Abstract
771,591. Supply systems for space discharge apparatus. GENERAL ELECTRIC CO., Ltd., and CATES, J. June 16, 1953 [June 23, 1952], No. 15804/52. Class 38 (4). [Also in Groups XI and XL (a)] A.C. circuits are described for a straight or circular fluorescent discharge lamp which is inserted in a fitting which carries the circuit fittings and is provided with a starting conductor not being a supply conductor for the lamp which is electrically insulated from the rest of the fitting and is supported so as to lie in close proximity to and along the length of the envelope of the lamp. In the circuit shown in Fig. 1 a metal channel or plate 13 forming part of the fitting and from which the starting conductor 11 is insulated is provided and the conductor 11 is connected through a capacitor 12 to the input terminal 3. In operation of the circuit from a single phase supply the input terminals 2, 3 are preferably connected to the supply so that terminal 2 is connected to the phase line and terminal 3 to the neutral line. If the circuit is operated from a 3-phase supply the terminals 2, 3 may be connected to different phase lines. The conductor 11 consists of 14 copper wires 0.0076 inch in diameter coated with polyvinyl chloride. The primary winding 5 of the filament heating transformer 4 is connected across the input terminals 2, 3 with an inductive ballast 6 in series, and the secondary windings 7, 8 are connected in series with the lamp filaments 9, 10. The envelope of the lamp can be coated with a transparent water-repellent coating such as silicone varnish. In the circuit shown in Fig. 2 the primary winding 5 is connected directly across the input terminals 2, 3, the filament heating secondary winding 7 being connected to the input terminal 2 through the ballast impedance 6. In the circuit shown in Fig. 3 the conductor 11 is connected through the capacitor 12 to the end of the secondary winding 8 which is not connected to the primary winding 5, which arrangement reduces the starting voltage. In the circuit shown in Fig. 4 the conductor 11 is connected to the input terminal 3 through a capacitor 12 and an additional secondary winding 14 of the transformer 4, which arrangement also reduces the starting voltage. The conductor 11 consists of two lengths of insulated conductor of the form referred to in connection with Fig. 1. The modifications of the circuit arrangement of Fig. 2 which are shown in Figs. 3 and 4 may also be employed in the circuit of Fig. 1. In a further modification the end of the secondary winding 14, Fig. 4, may be connected to the outer end of the secondary winding 8 at the point 16 resulting in a further reduction in the starting voltage. The inductive ballast 6 shown in Figs. 1, 2, 3 and 4 may be replaced by a capacitor ballast consisting of a choke in series with a capacitor, or by a resistor such as a tungsten lamp. The fitting for the discharge lamp may incorporate an incandescent lamp-holder. The fittings may be adapted for the operation of a plurality of lamps in series, or in parallel, each with its own ballast impedance, the transformer being provided with the appropriate number of secondary windings for supplying heating current to all the lamp filaments, and a common starting conductor may be provided, connected to one input terminal, when the lamps are arranged in line, or parallel conductors, one for each lamp, all connected to the same input terminal, may be provided when the lamps are arranged geometrically parallel to one another.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB15804/52A GB771591A (en) | 1952-06-23 | 1952-06-23 | Improvements in or relating to electric lighting fittings for the operation of electric discharge lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB15804/52A GB771591A (en) | 1952-06-23 | 1952-06-23 | Improvements in or relating to electric lighting fittings for the operation of electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB771591A true GB771591A (en) | 1957-04-03 |
Family
ID=10065770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15804/52A Expired GB771591A (en) | 1952-06-23 | 1952-06-23 | Improvements in or relating to electric lighting fittings for the operation of electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB771591A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2123600A (en) * | 1982-06-16 | 1984-02-01 | Yiu Ng Shu | Light fitting |
-
1952
- 1952-06-23 GB GB15804/52A patent/GB771591A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2123600A (en) * | 1982-06-16 | 1984-02-01 | Yiu Ng Shu | Light fitting |
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