GB434077A - Improvements in electric circuit arrangements for electric discharge devices - Google Patents
Improvements in electric circuit arrangements for electric discharge devicesInfo
- Publication number
- GB434077A GB434077A GB3966/35A GB396635A GB434077A GB 434077 A GB434077 A GB 434077A GB 3966/35 A GB3966/35 A GB 3966/35A GB 396635 A GB396635 A GB 396635A GB 434077 A GB434077 A GB 434077A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistances
- discharge
- feb
- electric
- cathode
- 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
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/10—Starting switches magnetic only
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
434,077. Discharge apparatus. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent- Treuhand-Ges. fur Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) Feb. 7, 1935, No. 3966. Convention date, Feb. 7, 1934. [Class 39 (i)] [See also Groups XI and XXXVI] A discharge device such as a lamp 1, Fig. 1, has at least one independently heated thermionic cathode 3, the heating element 4 being supplied through two resistances 9, 10 in parallel, one of the resistances 9 being disconnected when the discharge has started so as to reduce the heating current. The cathode may be indirectly-heated, filamentary or of mixed type. The switching is preferably performed by the discharge current, as by the relay 12. The resistances 9, 10 are preferably tungsten helices enclosed in a sealed vessel 17, Fig. 2, which is exhausted or filled with neutral gas. The switch 11, 12 may be within the vessel 17, as shown, or in a contact-carrying cap, Fig. 3 (not shown). The resistances 9, 10 may become incandescent when they act as an additional source of light. Specification 402,937 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE434077X | 1934-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB434077A true GB434077A (en) | 1935-08-26 |
Family
ID=6503796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3966/35A Expired GB434077A (en) | 1934-02-07 | 1935-02-07 | Improvements in electric circuit arrangements for electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB434077A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429162A (en) * | 1943-01-18 | 1947-10-14 | Boucher And Keiser Company | Starting and operating of fluorescent lamps |
| US2539547A (en) * | 1945-06-13 | 1951-01-30 | Clare & Co C P | Relay |
-
1935
- 1935-02-07 GB GB3966/35A patent/GB434077A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429162A (en) * | 1943-01-18 | 1947-10-14 | Boucher And Keiser Company | Starting and operating of fluorescent lamps |
| US2539547A (en) * | 1945-06-13 | 1951-01-30 | Clare & Co C P | Relay |
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