GB494787A - Improvements in or relating to electric discharge tubes - Google Patents
Improvements in or relating to electric discharge tubesInfo
- Publication number
- GB494787A GB494787A GB2266937A GB2266937A GB494787A GB 494787 A GB494787 A GB 494787A GB 2266937 A GB2266937 A GB 2266937A GB 2266937 A GB2266937 A GB 2266937A GB 494787 A GB494787 A GB 494787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cap
- electrode
- discharge
- envelope
- sealed
- 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
- H01J61/04—Electrodes; Screens; Shields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
Abstract
494,787. Discharge lamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen) Aug. 18, 1937 No. 22669. [Class 39 (i)] In an electric discharge device of the type comprising a sealed envelope, of which one part is vitreous and a cup-shaped metal cap forming part of the envelope and the interior surface of which is or carries one of the main electrodes of the device, and which is sealed to the vitreous part between the electrode and the other main electrode, a sleeve of electrical insulating-material is provided within the cap, and partially covers the interior surface of the cap and extends outward far enough to protect from the discharge the seal between the cap and the vitreous part of the envelope. The caps 2 of chromenickel or chrome-iron alloy are sealed to the glass tube at 5, and each carries a glass or ceramic cup 4 and a thermionic electrode 7 adapted to be heated by the discharge only, these being secured to the cap by a screw 8 soldered thereto. The cups 4 are flared to protect the seals 5 and have diaphragms perforated at 6. A starting electrode 3 and luminescent coating 9 are provided. The tube, which is intended for high pressure working, contains a rare gas at a pressure of a few millimetres and mercury.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2266937A GB494787A (en) | 1937-08-18 | 1937-08-18 | Improvements in or relating to electric discharge tubes |
| US218236A US2156068A (en) | 1937-07-29 | 1938-07-08 | Gaseous electric discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2266937A GB494787A (en) | 1937-08-18 | 1937-08-18 | Improvements in or relating to electric discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB494787A true GB494787A (en) | 1938-11-01 |
Family
ID=10183173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2266937A Expired GB494787A (en) | 1937-07-29 | 1937-08-18 | Improvements in or relating to electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB494787A (en) |
-
1937
- 1937-08-18 GB GB2266937A patent/GB494787A/en not_active Expired
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