GB418220A - Improvements in and relating to envelopes for electric discharge devices - Google Patents
Improvements in and relating to envelopes for electric discharge devicesInfo
- Publication number
- GB418220A GB418220A GB11475/33A GB1147533A GB418220A GB 418220 A GB418220 A GB 418220A GB 11475/33 A GB11475/33 A GB 11475/33A GB 1147533 A GB1147533 A GB 1147533A GB 418220 A GB418220 A GB 418220A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stem
- discharge devices
- envelope
- interior
- envelopes
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
- H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
418,220. Discharge devices. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London, CHENEY, H., Shenstone Avenue, and DAVIES, L. J., 147, Murray Road, both in Rugby. April 19, 1933, No. 11475. Drawings to Specification. [Class 39 (i).] In a vapour-filled discharge device such as a lamp, the leading-in wires are sealed into the press of a flared tubular stem, the flare of which is subsequently sealed to the envelope so that the interior of the stem communicates with the interior of the envelope. The stem may be shaped to obtain a hemispherical seal which can be formed on the normal lamp-making machine. The cathode core, which becomes oxidized during the making of the stem, is subsequently cleaned, mechanically or chemically, and coated with electron-emitting material.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11475/33A GB418220A (en) | 1933-04-19 | 1933-04-19 | Improvements in and relating to envelopes for electric discharge devices |
| US720112A US2042143A (en) | 1933-04-19 | 1934-04-11 | Enveloe for electric discharge devices |
| FR771922D FR771922A (en) | 1933-04-19 | 1934-04-17 | Improvements to light bulbs for electronic discharge tubes, lamps and similar articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11475/33A GB418220A (en) | 1933-04-19 | 1933-04-19 | Improvements in and relating to envelopes for electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB418220A true GB418220A (en) | 1934-10-19 |
Family
ID=9986934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11475/33A Expired GB418220A (en) | 1933-04-19 | 1933-04-19 | Improvements in and relating to envelopes for electric discharge devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2042143A (en) |
| FR (1) | FR771922A (en) |
| GB (1) | GB418220A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452626A (en) * | 1945-03-03 | 1948-11-02 | Gen Electric X Ray Corp | Electron emitter |
-
1933
- 1933-04-19 GB GB11475/33A patent/GB418220A/en not_active Expired
-
1934
- 1934-04-11 US US720112A patent/US2042143A/en not_active Expired - Lifetime
- 1934-04-17 FR FR771922D patent/FR771922A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2042143A (en) | 1936-05-26 |
| FR771922A (en) | 1934-10-19 |
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