GB575151A - Improvements in and relating to metal to glass seals and method of making the same - Google Patents
Improvements in and relating to metal to glass seals and method of making the sameInfo
- Publication number
- GB575151A GB575151A GB19986/44A GB1998644A GB575151A GB 575151 A GB575151 A GB 575151A GB 19986/44 A GB19986/44 A GB 19986/44A GB 1998644 A GB1998644 A GB 1998644A GB 575151 A GB575151 A GB 575151A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- stem
- oct
- tungsten
- block
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal
-
- 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
- H01J9/326—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device making pinched-stem or analogous seals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
575,151. Metal-to-glass seals. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 16, 1944, No. 19986. Convention date, Oct. 16, 1943. [Class 36] [Also in Group XI] To obviate the necessity for protective precoating, tungsten or molybdenum leads are sealed in electric lamps or discharge devices by heating the metal in a mildly oxidising atmosphere such as carbon dioxide whilst the heated vitreous casting is pinched over. Figs. 1 and 2 show a suitable apparatus for effecting the seal comprising a rotary head 10 supporting a block 15 on which the glass &c. stem S is supported. The leads L are positioned in holes 16 in the block, oxidizing flames 19 being directed on to the lower end of the rotating stem by stationary burners 18. The pinch is effected by movable presser-jaws 20 mounted on the head 10. The oxidizing gas is preferably fed into the stem through metal pipes 25. Fig. 3 shows a composite lead comprising a tungsten section 23 for the actual seal, an external length 21 of stranded copper wire, and an internal length 22 of single-strand metal such as nickel. Specification 561,682 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US575151XA | 1943-10-16 | 1943-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB575151A true GB575151A (en) | 1946-02-05 |
Family
ID=22011046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19986/44A Expired GB575151A (en) | 1943-10-16 | 1944-10-16 | Improvements in and relating to metal to glass seals and method of making the same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB575151A (en) |
-
1944
- 1944-10-16 GB GB19986/44A patent/GB575151A/en not_active Expired
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