GB971702A - Improvements relating to methods of strengthening glass objects - Google Patents
Improvements relating to methods of strengthening glass objectsInfo
- Publication number
- GB971702A GB971702A GB1758561A GB1758561A GB971702A GB 971702 A GB971702 A GB 971702A GB 1758561 A GB1758561 A GB 1758561A GB 1758561 A GB1758561 A GB 1758561A GB 971702 A GB971702 A GB 971702A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glaze
- coefficient
- expansion
- methods
- glass object
- 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
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Glass Compositions (AREA)
Abstract
A method of locally strengthening a glass object, e.g. a cathode-ray tube, comprises coating a zone of the object in which tensile stresses may occur with a layer of devitrifiable glaze having a coefficient of expansion lower than that of the glass object and heating the zone until the glaze acquires a crystal structure. A suspension of powdered glaze in ethyl acetate, alcohol or water which may contain a binder, e.g. nitro-cellulose, may be applied by spraying, smearing or dipping. In an example, a glass object having the composition 70.3% SiO2, 0.5% Li2O, 7.8% Na2O, 7.5% K2O, 11.1% BaO, 2.5% Al2O3, 0.3% Sb2O3 (coefficient of expansion 95 x 10-7 at 30-300 DEG C.) is coated with a devitrifiable glaze consisting of 22.7% B2O3, 68.2% ZnO, 9.1% P2O5 (coefficient of expansion 45 x 10-7 at 30-300 DEG C.).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL251759 | 1960-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB971702A true GB971702A (en) | 1964-10-07 |
Family
ID=19752358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1758561A Expired GB971702A (en) | 1960-05-18 | 1961-05-15 | Improvements relating to methods of strengthening glass objects |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1188216B (en) |
| GB (1) | GB971702A (en) |
| NL (2) | NL251759A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2785820A (en) * | 1952-06-28 | 1957-03-19 | Owens Illinois Glass Co | Controlling implosions in cathode ray and other tubes |
| NL94598C (en) * | 1955-07-06 |
-
0
- NL NL112409D patent/NL112409C/xx active
- NL NL251759D patent/NL251759A/xx unknown
-
1961
- 1961-05-15 GB GB1758561A patent/GB971702A/en not_active Expired
- 1961-05-15 DE DEN20047A patent/DE1188216B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL251759A (en) | |
| NL112409C (en) | |
| DE1188216B (en) | 1965-03-04 |
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