GB417179A - Improvements in and relating to luminous discharge tubes - Google Patents
Improvements in and relating to luminous discharge tubesInfo
- Publication number
- GB417179A GB417179A GB6286/33A GB628633A GB417179A GB 417179 A GB417179 A GB 417179A GB 6286/33 A GB6286/33 A GB 6286/33A GB 628633 A GB628633 A GB 628633A GB 417179 A GB417179 A GB 417179A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- discharge
- solenoid
- cathode
- current 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
- H05B41/40—Controlling the intensity of light discontinuously
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
417,179. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Garman, G. W. ; 98, Reynolds Street, Scotia, New York, U.S.A.) March 1, 1933, No. 6286. Convention date, March 1, 1932. [Class 39 (i).] A positive-column lamp operated from an alternating-current supply has an impedance for varying the luminosity, and the discharge is maintained by an auxiliary discharge throughout the lamp during the intervals when the main current falls below the value required to maintain the discharge. As shown, the main discharge passes between an indirectly-heated cathode 4 and two anodes 2, 3, and the auxiliary discharge between the cathode and an anode 9 is maintained by a continuous-current supply 11, 12. The output of the lamp may be varied over a wide range by an iron-cored impedance, one winding 35 of which is connected through a variable resistance 38 with the continuouscurrent supply and the other winding 33 is in the alternating-current circuit 29, 30. The secondary of the input transformer 14 is connected through resistances 22, 23 with the anodes 2, 3, and its centre point is connected through a solenoid 16 with the cathode. A mercury switch 18, operated by the armature of the solenoid 16, is connected through the contacts of an electromagnetic switch 28 and a resistance 27 across a part of the secondary. The anode 9 is connected through the solenoid of the switch 28 and a resistance 13 with the continuous current supply. Closure of the starting switch 15 causes the mercury switch to be opened and produce a high voltage impulse between the electrodes 2, 4. The auxiliary discharge is also started, and the starting circuit is opened by the switch 28. The filling consists of neon, argon, helium or mercury vapour or a mixture of these at a pressure of 1 to 10 millimeters. Reference has been directed by the Comptroller to Specijkations 322,729, [Class 39 (i)], 352,902, and 397,466 (as open to inspection under Sect. 91 of the Acts).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US417179XA | 1932-03-01 | 1932-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB417179A true GB417179A (en) | 1934-10-01 |
Family
ID=21917965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6286/33A Expired GB417179A (en) | 1932-03-01 | 1933-03-01 | Improvements in and relating to luminous discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB417179A (en) |
-
1933
- 1933-03-01 GB GB6286/33A patent/GB417179A/en not_active Expired
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