GB734461A - Improvements in or relating to methods of, and apparatus for, forming accurately shaped outer surfaces on glass tubes - Google Patents
Improvements in or relating to methods of, and apparatus for, forming accurately shaped outer surfaces on glass tubesInfo
- Publication number
- GB734461A GB734461A GB1782453A GB1782453A GB734461A GB 734461 A GB734461 A GB 734461A GB 1782453 A GB1782453 A GB 1782453A GB 1782453 A GB1782453 A GB 1782453A GB 734461 A GB734461 A GB 734461A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- tube
- rollers
- axis
- accurately
- 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
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/07—Re-forming tubes or rods by blowing, e.g. for making electric bulbs
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
734,461. Glass manufacture. GENERAL ELECTRIC CO., Ltd., DAVIDSON, T. R. N., and SCRUTON, A. H. June 25, 1954 [June 26, 1953], No. 17824/53. Class 56. A part of the external surface of a glass tube is accurately shaped and dimensioned, as a surface of revolution, by rotating the tube about its axis, softening the glass over the part to be shaped, creating an excess pressure within the tube so as to force the softened glass outwardly into contact with a roller or rollers which impart the final shape to the glass. As shown in plan in Fig. 1, the glass tube 3 is closed by end bungs 1, 2, the latter having a connection 4 with an air pump. The tube is held in two opposed rotary chucks (not shown), one of which is displaceable along the axis of rotation for insertion and removal of the tubes. The glass is softened by a gas burner 5 with jets 6, and cylindrical iron rollers 7 are accurately positioned, by a right- and lefthanded screw adjustment 14, 15 on each side of the tube. The screw 14, 15 is mounted in a central stationary bearing on the base 11 and the blocks 10, which carry the rollers, slide on the base on which stops are adjustably secured to limit the inward movement of the rollers. The chilling effect of the rollers reduces the temperature of the glass to below its softening point, the gas flames then being lowered to reduce the strains in the glass. The air pressure is then released. A conical part of a glass tube may be accurately shaped by using cylindrical rollers with their axes inclined to the axis of rotation, or by using frusto-conical rollers. The neck portion of a cathode-ray tube may be accurately formed, either before or after it is secured to the bulb portion of the envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1782453A GB734461A (en) | 1953-06-26 | 1953-06-26 | Improvements in or relating to methods of, and apparatus for, forming accurately shaped outer surfaces on glass tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1782453A GB734461A (en) | 1953-06-26 | 1953-06-26 | Improvements in or relating to methods of, and apparatus for, forming accurately shaped outer surfaces on glass tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB734461A true GB734461A (en) | 1955-08-03 |
Family
ID=10101862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1782453A Expired GB734461A (en) | 1953-06-26 | 1953-06-26 | Improvements in or relating to methods of, and apparatus for, forming accurately shaped outer surfaces on glass tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB734461A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853522A (en) * | 1972-06-15 | 1974-12-10 | Jenaer Glaswerk Schott & Gen | Method and apparatus of calibrating drawn glass tubes |
| US4477273A (en) * | 1982-06-15 | 1984-10-16 | At&T Technologies, Inc. | Method of and apparatus for straightening and configuring a preform tube from which lightguide fiber is drawn |
-
1953
- 1953-06-26 GB GB1782453A patent/GB734461A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853522A (en) * | 1972-06-15 | 1974-12-10 | Jenaer Glaswerk Schott & Gen | Method and apparatus of calibrating drawn glass tubes |
| US4477273A (en) * | 1982-06-15 | 1984-10-16 | At&T Technologies, Inc. | Method of and apparatus for straightening and configuring a preform tube from which lightguide fiber is drawn |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1063467A (en) | Production of smooth surfaces on vitreous bodies | |
| GB1353262A (en) | Method and apparatus for shaping the body of a can having a grooved neck | |
| GB734461A (en) | Improvements in or relating to methods of, and apparatus for, forming accurately shaped outer surfaces on glass tubes | |
| GB1435522A (en) | Apparatus for producing ampoules | |
| GB809843A (en) | Improvements in or relating to methods of manufacturing hollow glass objects closed at one extremity | |
| US2427722A (en) | Glass tube heating apparatus | |
| GB442519A (en) | Braun tube, and method of producing the same | |
| US2922256A (en) | Methods of sealing a tubular glass neck portion to a glass wall | |
| GB634326A (en) | Improvements relating to the manufacture of glass envelopes for cathode ray tubes or the like | |
| GB738203A (en) | Improvements in or relating to the manufacture of glass bodies | |
| GB731765A (en) | Improvements in or relating to methods of forming flares at the ends of glass tubes | |
| US3529950A (en) | Adjustable-blank carrier for glassware forming machines | |
| GB762088A (en) | Improvements in cathode ray tubes | |
| GB691636A (en) | Improvements in or relating to the manufacture of cathode ray tubes | |
| GB475846A (en) | Electron discharge tubes and methods of manufacturing such tubes | |
| GB794310A (en) | Bulb rolling machine | |
| GB728887A (en) | Method and apparatus for producing filmed and tempered articles | |
| GB795069A (en) | Improvements in or relating to methods of sealing a tubular glass neck portion to a glass wall | |
| GB337431A (en) | An improved process and apparatus for producing glass vacuum-insulated vessels | |
| US1199482A (en) | Apparatus for the manufacture of double-walled vacuum-receptacles. | |
| GB591648A (en) | Improvements in the manufacture of stems for electron discharge devices and the like | |
| GB1330437A (en) | Apparatus for the production of hollow glass bodies from glass tubes | |
| GB676054A (en) | Improvements in or relating to a method of manufacturing electric discharge tubes | |
| GB565766A (en) | Improvements in or relating to machinery for the manufacture of parts from fusible material | |
| GB730093A (en) | Improvements in and relating to electric discharge tubes |