CH218223A - Electric low pressure fluorescent tube and process for their manufacture. - Google Patents
Electric low pressure fluorescent tube and process for their manufacture.Info
- Publication number
- CH218223A CH218223A CH218223DA CH218223A CH 218223 A CH218223 A CH 218223A CH 218223D A CH218223D A CH 218223DA CH 218223 A CH218223 A CH 218223A
- Authority
- CH
- Switzerland
- Prior art keywords
- manufacture
- low pressure
- fluorescent tube
- electric low
- pressure fluorescent
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
-
- 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
- H05B41/16—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies having no starting switch
- H05B41/23—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
- H05B41/232—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
- H05B41/2325—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE218223X | 1940-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH218223A true CH218223A (en) | 1941-11-30 |
Family
ID=5831184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH218223D CH218223A (en) | 1940-05-04 | 1941-04-29 | Electric low pressure fluorescent tube and process for their manufacture. |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE437143A (en) |
| CH (1) | CH218223A (en) |
| FR (1) | FR869463A (en) |
| GB (1) | GB523924A (en) |
-
0
- BE BE437143D patent/BE437143A/xx unknown
-
1939
- 1939-01-17 GB GB1639/39A patent/GB523924A/en not_active Expired
-
1941
- 1941-01-23 FR FR869463D patent/FR869463A/en not_active Expired
- 1941-04-29 CH CH218223D patent/CH218223A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB523924A (en) | 1940-07-25 |
| BE437143A (en) | |
| FR869463A (en) | 1942-02-03 |
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