GB397716A - Improvements in or relating to installations comprising a gasfilled electric discharge lamp - Google Patents
Improvements in or relating to installations comprising a gasfilled electric discharge lampInfo
- Publication number
- GB397716A GB397716A GB31941/32A GB3194132A GB397716A GB 397716 A GB397716 A GB 397716A GB 31941/32 A GB31941/32 A GB 31941/32A GB 3194132 A GB3194132 A GB 3194132A GB 397716 A GB397716 A GB 397716A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- grid
- current
- potential
- supply
- 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
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
397,716. Discharge lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Nov. 11, 1932, No. 31941. Convention date, Nov. 12, 1931. [Class 39 (i).] A gas-filled lamp having a negative characteristic and supplied with current which assumes a zero value periodically, is connected in series with a gas-filled discharge tube having a grid to which is applied a potential which becomes negative at or before the period that the discharge current is zero, and does not become zero or positive until some time after the moment that the anode becomes positive with respect to its cathode ; by varying the period of time between the moment at which the current becomes zero and the moment at which the grid potential becomes zero or positive, the average current intensity through the lamp may be regulated. As shown in Fig. 1, the lamp 1 is in series with the tube 7, the anode 6 of, which is connected with one lamp electrode 2, the other 3 being connected through the secondary 12 of a transformer with the tube cathode 5. The A.C. supply 8 is also connected with a transformer primary 16 through an inductance 15 in parallel with a variable resistance 14, the secondary 18 being connected across the grid 7 and cathode through a resistance 19. Fig. 2 shows curves of supply potential 20, the potential 21 of the grid, and the current 22 through the tube and lamp ; the current 22 passes only during a fraction of each positive half wave of the supply, and the fraction, and thus the average current intensity, can be varied by varying the lag of the grid voltage 21 by means of the resistance 14 and inductance 15. Similar circuits are shown for a lamp having two anodes. With a D.C. supply the circuit may be opened periodically by a switch and the grid potential controlled by a switch.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL397716X | 1931-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB397716A true GB397716A (en) | 1933-08-31 |
Family
ID=19785866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31941/32A Expired GB397716A (en) | 1931-11-12 | 1932-11-11 | Improvements in or relating to installations comprising a gasfilled electric discharge lamp |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB397716A (en) |
-
1932
- 1932-11-11 GB GB31941/32A patent/GB397716A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB469755A (en) | Improvements in and relating to electric, astatic regulating arrangements | |
GB397716A (en) | Improvements in or relating to installations comprising a gasfilled electric discharge lamp | |
GB499280A (en) | Improvements in and relating to electric valve circuits | |
GB422713A (en) | Improvements in and relating to electric converting apparatus | |
US2162533A (en) | Translating device | |
GB546738A (en) | Improvements in or relating to control circuits for vapour electric discharge devices | |
SU27894A1 (en) | Device for separating grid currents in electron tubes | |
GB395224A (en) | Improvements in or relating to devices comprising a luminous electric discharge tube | |
GB417179A (en) | Improvements in and relating to luminous discharge tubes | |
SU37775A1 (en) | Mercury Rectifier Training Device | |
GB347094A (en) | Improvements in and relating to circuit arrangements for maintaining constant voltage | |
GB421461A (en) | Improvements in or relating to circuit arrangements for rectifiers | |
GB422186A (en) | Improvements in or relating to grid controlled electric discharge apparatus | |
GB481789A (en) | Improvements in and relating to circuit arrangements for quenching electric discharge arcs | |
GB731384A (en) | Improvements in or relating to electric circuit arrangements for operating electric lamps | |
GB506788A (en) | Improvements in arc discharge arrangements for converting electric currents | |
GB412427A (en) | Improvements in and relating to x-ray systems | |
GB450750A (en) | Improvements in and relating to systems of electric resistance welding | |
GB498210A (en) | Improvements in and relating to electric valve circuits | |
GB470481A (en) | Improvements in and relating to control devices for electric circuits | |
GB455376A (en) | Improvements in and relating to electric discharge devices | |
GB436935A (en) | Improvements in and relating to methods of and apparatus for the grid control of vapour or gas discharge devices operating as converters | |
GB254731A (en) | Improvements in electron discharge apparatus | |
GB387714A (en) | Improvements in and relating to electric welding | |
GB388801A (en) | Improvements in and relating to mercury vapour valves |