GB369722A - Improvements in the manufacture of glass articles - Google Patents
Improvements in the manufacture of glass articlesInfo
- Publication number
- GB369722A GB369722A GB504331A GB504331A GB369722A GB 369722 A GB369722 A GB 369722A GB 504331 A GB504331 A GB 504331A GB 504331 A GB504331 A GB 504331A GB 369722 A GB369722 A GB 369722A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- bulb
- glass
- wall
- closing
- 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
- H01J9/40—Closing vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
369,722. Discharge apparatus GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and BREADNER, R. L., of General Electric Co., Wembley, Middlesex. Feb. 17, 1931, No. 5043. [Class 39 (i).] A method of sealing off a glass tube of wide bore consists in placing a closing - mem ber of fusible material preferably glass, within the tube, and then softening the member by heat so that is makes a fused joint with the wall of the tube. Fig. 1 illustrates the use of the method for sealing the exhaust tube 1 of a vacuum tube. The closing- member 3 consists of a bulb made from glass having approximately the same coefficient of expansion as glass tube 1 but having a much lower softening temperature. It is placed in a side tube 4 where it does not prevent the flow of gas to the exhaust pump, and it may be fitted with a coil 6 of iron wire to enable it to be moved along the tube by means of a magnet. A construction 5 is formed on the tube 1 at the place where the seal is to be made, and after exhaustion has been completed, the bulb is moved into contact with the constriction. The tube 1 is then heated at the constriction until the wall of the bulb softens and unites with the wall of the tube. The pressure of the air within the bulb assists in forming the joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB504331A GB369722A (en) | 1931-02-17 | 1931-02-17 | Improvements in the manufacture of glass articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB504331A GB369722A (en) | 1931-02-17 | 1931-02-17 | Improvements in the manufacture of glass articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB369722A true GB369722A (en) | 1932-03-31 |
Family
ID=9788664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB504331A Expired GB369722A (en) | 1931-02-17 | 1931-02-17 | Improvements in the manufacture of glass articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB369722A (en) |
-
1931
- 1931-02-17 GB GB504331A patent/GB369722A/en not_active Expired
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