GB537447A - Improved circuit arrangements for operating electric discharge lamps - Google Patents
Improved circuit arrangements for operating electric discharge lampsInfo
- Publication number
- GB537447A GB537447A GB5067/40A GB506740A GB537447A GB 537447 A GB537447 A GB 537447A GB 5067/40 A GB5067/40 A GB 5067/40A GB 506740 A GB506740 A GB 506740A GB 537447 A GB537447 A GB 537447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- discharge lamps
- working
- electric discharge
- circuit arrangements
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/541—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch
- H01J61/542—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch and an auxiliary electrode inside the vessel
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
537,447. Discharge lamps. BRITISH THOMSONHOUSTON CO., Ltd., SCOTT, W. J. and DAVIES, L. J. March 19, 1940, No. 5067. [Class 39 (i)] In low-pressure discharge devices of the type in which one or both of the thermionic filamentary electrodes 2 are heated prior to the initiation of the discharge, a thermal responsive switch consisting of a bimetallic element 9 is connected to one of the leads of each electrode operating as cathode and short circuits the terminals of the electrodes during normal operation. The tube may have a filling of gas or vapour, such as mercury, and may be fluorescent or coated on its inner surface with a suitable phosphor. The circuit comprises a starting switch 8, which may be hand operated, or automatically operated with time delay, for connecting the electrodes in series with the main supply during the preheating period. The circuit includes a ballast reactor 7 for A.C. working or a resistance for DC working.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5067/40A GB537447A (en) | 1940-03-19 | 1940-03-19 | Improved circuit arrangements for operating electric discharge lamps |
| US359254A US2298904A (en) | 1940-03-19 | 1940-10-01 | Electric discharge apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5067/40A GB537447A (en) | 1940-03-19 | 1940-03-19 | Improved circuit arrangements for operating electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB537447A true GB537447A (en) | 1941-06-23 |
Family
ID=9789122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5067/40A Expired GB537447A (en) | 1940-03-19 | 1940-03-19 | Improved circuit arrangements for operating electric discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2298904A (en) |
| GB (1) | GB537447A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2464373A (en) * | 1941-07-14 | 1949-03-15 | Nat Inv S Corp | Fluorescent discharge tube |
| US2477456A (en) * | 1946-08-29 | 1949-07-26 | Everett B Iluff | Fluorescent lamp |
| US2594357A (en) * | 1947-03-03 | 1952-04-29 | Mega Corp | Electronic animated advertising sign system |
| US5345150A (en) * | 1992-03-26 | 1994-09-06 | Stocker & Yale, Inc. | Regulating light intensity by means of magnetic core with multiple windings |
| US5239239A (en) * | 1992-03-26 | 1993-08-24 | Stocker & Yale, Inc. | Surrounding a portion of a lamp with light regulation apparatus |
-
1940
- 1940-03-19 GB GB5067/40A patent/GB537447A/en not_active Expired
- 1940-10-01 US US359254A patent/US2298904A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2298904A (en) | 1942-10-13 |
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