GB591440A - Improvements in electric switches for initiating the discharge in fluorescent tubular lamps and other gas discharge electric lamps - Google Patents
Improvements in electric switches for initiating the discharge in fluorescent tubular lamps and other gas discharge electric lampsInfo
- Publication number
- GB591440A GB591440A GB1638545A GB1638545A GB591440A GB 591440 A GB591440 A GB 591440A GB 1638545 A GB1638545 A GB 1638545A GB 1638545 A GB1638545 A GB 1638545A GB 591440 A GB591440 A GB 591440A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- discharge
- electric
- lamps
- strips
- 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
- H05B41/06—Starting switches thermal only
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
591,440. Thermal switches. R E V O ELECTRIC CO., Ltd., and FELTON, A. E. June 27, 1945, No. 16385. [Class 38(v)] A switch for initiating the discharge in a gas discharge lamp comprises a bimetallic strip b<6> carrying a contact b<8> which normally engages a contact b<7> carried by a metal strip b<5>, the lower ends b<4>, b<3> of the strips projecting from the annular wall of an insulating base a. The position of the contact b<7> can be adjusted by means of a screw a<1>. Surrounding but insulated from the bimetallic strip b<6> is a heating coil d the ends of which are connected to a second pair of metal strips projecting from the base a. These strips and the strips b4, b<3> form the terminals for connection to the lamp circuit, the contacts b<7>, b<8> normally bridging the gas column in the lamp. To light the lamp, current is sent through the four terminals of the switch whereby the coil d and the thermionic electrodes of the lamp are heated till the strip b<6> bends sumciently to open the contacts b<7>, b<8> thus producing sufficient potential difference between the lamp electrodes to initiate the discharge. The screw a<1> is adjusted to ensure the necessary time lag between the flow of current and separation of the contacts b<7>, b<8>.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB591440A true GB591440A (en) | 1947-08-18 |
Family
ID=1732273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1638545A Expired GB591440A (en) | 1945-06-27 | Improvements in electric switches for initiating the discharge in fluorescent tubular lamps and other gas discharge electric lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB591440A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468521B1 (en) | 1998-08-14 | 2002-10-22 | Coloplast A/S | Stabilized compositions having antibacterial activity |
| US8192764B2 (en) | 2006-01-13 | 2012-06-05 | 3M Innovative Properties Company | Silver-containing antimicrobial articles and methods of manufacture |
| US8399027B2 (en) | 2005-04-14 | 2013-03-19 | 3M Innovative Properties Company | Silver coatings and methods of manufacture |
-
1945
- 1945-06-27 GB GB1638545A patent/GB591440A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468521B1 (en) | 1998-08-14 | 2002-10-22 | Coloplast A/S | Stabilized compositions having antibacterial activity |
| US8399027B2 (en) | 2005-04-14 | 2013-03-19 | 3M Innovative Properties Company | Silver coatings and methods of manufacture |
| US8192764B2 (en) | 2006-01-13 | 2012-06-05 | 3M Innovative Properties Company | Silver-containing antimicrobial articles and methods of manufacture |
| US9289450B2 (en) | 2006-01-13 | 2016-03-22 | 3M Innovative Properties Company | Silver-containing antimicrobial articles and methods of manufacture |
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