GB418845A - Improvements relating to electric discharge lamps - Google Patents
Improvements relating to electric discharge lampsInfo
- Publication number
- GB418845A GB418845A GB1872333A GB1872333A GB418845A GB 418845 A GB418845 A GB 418845A GB 1872333 A GB1872333 A GB 1872333A GB 1872333 A GB1872333 A GB 1872333A GB 418845 A GB418845 A GB 418845A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- lamp
- discharge
- supplies
- lamps
- 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
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/38—Cold-cathode tubes
- H01J17/40—Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/64—Cathode glow lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
- H01J2893/0065—Electrode systems
- H01J2893/0067—Electrode assembly without control electrodes, e.g. including a screen
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Cultivation Of Plants (AREA)
- Discharge Lamp (AREA)
Abstract
418,845. Discharge lamps. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., Caxton House, Tothill Street, DOBRULUX, Ltd., 107, New Bond Street, both in London, and ALDINGTON, J. N., c/o Siemens Electric Lamps & Supplies, Ltd., Dock Road, Preston. July 1, 1933, No. 18723. [Class 39 (i).] A cathode glow discharge lamp has symmetrically disposed electrodes spaced apart by thin solid insulation, one of the electrodes being a tapered surface of revolution and having its active surface area at least three, and preferably about eight, times that of the active surface of the other electrode. When the lamp is connected to an alternating source of supply the discharge is caused to oscillate or gyrate over the surface of the larger electrode. In the example shown the domed electrode m, preferably of aluminium, is screwed to a supporting rod d<1> connected to the lead d. An extension b<3> of the pinch supports the electrode o, preferably of iron, which is provided with mica discs p, r<1>, r<2> which leave only the edge and a narrow annulus of the top surface exposed. The leads d, g are provided with an insulating and heat-resisting coating. A series resistance i is included in the lamp. The filling may be neon at a pressure of 10-20 mms. of mercury optionally with small quantities of hydrogen, helium or argon. Specification 383,530 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1872333A GB418845A (en) | 1933-07-01 | 1933-07-01 | Improvements relating to electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1872333A GB418845A (en) | 1933-07-01 | 1933-07-01 | Improvements relating to electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB418845A true GB418845A (en) | 1934-11-01 |
Family
ID=10117299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1872333A Expired GB418845A (en) | 1933-07-01 | 1933-07-01 | Improvements relating to electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB418845A (en) |
-
1933
- 1933-07-01 GB GB1872333A patent/GB418845A/en not_active Expired
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