GB486256A - Improvements in methods of making vacuum tight connections between metal and ceramicsubstances - Google Patents
Improvements in methods of making vacuum tight connections between metal and ceramicsubstancesInfo
- Publication number
- GB486256A GB486256A GB13296/37A GB1329637A GB486256A GB 486256 A GB486256 A GB 486256A GB 13296/37 A GB13296/37 A GB 13296/37A GB 1329637 A GB1329637 A GB 1329637A GB 486256 A GB486256 A GB 486256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- solder
- substances
- ceramic
- tight connections
- 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
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/32—Seals for leading-in conductors
- H01J5/40—End-disc seals, e.g. flat header
- H01J5/42—End-disc seals, e.g. flat header using intermediate part
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
- H01J2893/0034—Lamp bases
Landscapes
- Ceramic Products (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
486,256. Sealing metal to ceramic material by heat. BRITISH THOMSONHOUSTON CO., Ltd. May 10, 1937, No. 13296. Convention date, May 12, 1936. [Class 36] A process for making vacuum-tight connections between metal and ceramic substances comprises filling the space between both substances at the point of connection with an easily fusible metal or solder, heating the substances in a vacuum furnace up to or above the melting temperature of the solder and, after melting the solder, admitting a neutral gas, preferably hydrogen, into the furnace at a pressure of one or several atmospheres to increase the pressure acting on the surface of the solder. The example shows a sealed leading- in arrangement into a metal discharge vessel 7, wherein a ceramic sleeve 1 of porcelain, steatite, or the like is sealed between a metal tube 2 and cap 3, the tube 2 being welded to the vessel 7. Annular grooves 5 are provided in the ceramic sleeve 1 to receive a soldering medium such as silver and, to prevent the solder from being attacked by mercury vapour when the device is in use, a packing material such as a glass flux, metal oxide, or asbestos, is located within annular slots 4. Alternatively the annular grooves may be provided in the metal parts, so that a smooth insulator may be used. The soldering medium is placed in the form of wire ribbon or powder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE486256X | 1936-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486256A true GB486256A (en) | 1938-06-01 |
Family
ID=6543413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13296/37A Expired GB486256A (en) | 1936-05-12 | 1937-05-10 | Improvements in methods of making vacuum tight connections between metal and ceramicsubstances |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB486256A (en) |
-
1937
- 1937-05-10 GB GB13296/37A patent/GB486256A/en not_active Expired
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