GB663549A - Improvements in circuits for the control of luminous electric discharge tubes - Google Patents
Improvements in circuits for the control of luminous electric discharge tubesInfo
- Publication number
- GB663549A GB663549A GB26430/48A GB2643048A GB663549A GB 663549 A GB663549 A GB 663549A GB 26430/48 A GB26430/48 A GB 26430/48A GB 2643048 A GB2643048 A GB 2643048A GB 663549 A GB663549 A GB 663549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transductor
- potentiometer
- transformer
- discharge
- winding
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
663,549. Supply systems for discharge lamps. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Oct. 11, 1948 [Oct. 5, 1948], No. 26430/48. [A Specification was laid open to inspection under Sect. 91 of the Acts, April 12, 1949.] Class 38 (iv). To maintain constant electrode heating in a discharge lamp 20 supplied through a dimming transductor 29, a variable potentiometer 27 conjointly controls the transductor and the input to an electrode-heating transformer 25 in opposite senses, so that as the discharge current is increased the output of the transformer is reduced and vice versa. In another arrangement a further transductor is in series with the primary winding of the heating transformer, and the two output circuits of the potentiometer (which is now across a D.C. source) feed the control windings of the two transductors. Fig. 3 shows a circuit in which the transductor 29 has a separately energized D.C. winding 54 opposed by a winding 53 responsive to current in the primary circuit of the heater transformer, which is controlled by a potentiometer 51. A switch 55 actuated by the potentiometer may control the closing of the discharge circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE663549X | 1948-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB663549A true GB663549A (en) | 1951-12-27 |
Family
ID=20314410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26430/48A Expired GB663549A (en) | 1948-10-05 | 1948-10-11 | Improvements in circuits for the control of luminous electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB663549A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1039635B (en) * | 1954-01-15 | 1958-09-25 | Licentia Gmbh | Fade circuit for lighting systems |
-
1948
- 1948-10-11 GB GB26430/48A patent/GB663549A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1039635B (en) * | 1954-01-15 | 1958-09-25 | Licentia Gmbh | Fade circuit for lighting systems |
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