GB476401A - Improvements in glass insulators for electrical purposes - Google Patents
Improvements in glass insulators for electrical purposesInfo
- Publication number
- GB476401A GB476401A GB1724/37A GB172437A GB476401A GB 476401 A GB476401 A GB 476401A GB 1724/37 A GB1724/37 A GB 1724/37A GB 172437 A GB172437 A GB 172437A GB 476401 A GB476401 A GB 476401A
- Authority
- GB
- United Kingdom
- Prior art keywords
- skirt
- head
- insulator
- per cent
- glass
- 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
- 239000012212 insulator Substances 0.000 title abstract 5
- 239000011521 glass Substances 0.000 title abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910017053 inorganic salt Inorganic materials 0.000 abstract 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000003989 dielectric material Substances 0.000 abstract 1
- 239000000374 eutectic mixture Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 235000010333 potassium nitrate Nutrition 0.000 abstract 1
- 239000004323 potassium nitrate Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 235000010344 sodium nitrate Nutrition 0.000 abstract 1
- 239000004317 sodium nitrate Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 238000005496 tempering Methods 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
Abstract
476,401. Tempering glass. CORNING GLASS WORKS. Jan. 20, 1937, No. 1724. Convention date, Jan. 31, 1936, [Class 56] An electric insulator having a head and a skirt, particularly of the kind used for suspending power cables, is made of glass and is hardened or tempered in such a manner that the skirt is untempered, or is less highly tempered than the head, so that breakage of the skirt does not cause the whole insulator to shatter. The glass used for the insulator may consist of 80À6 per cent of SiO2, 13À0 per cent of B2O3, 4-4 per cent of Na2O, and 2À0 per cent of Al2O3. The insulator, preferably as it is taken from the press, is heated to a temperature of 550‹ C. in a suitable furnace, or by submerging it in a bath composed of molten inorganic salt. It is then chilled in such a manner that the desired distribution of stresses is obtained. For example, a nozzle may be inserted in the pin hole of the insulator, and a stream of high velocity air directed on to the walls of the hole. A high velocity. air blast is also directed against the outer side of the head while the skirt is cooled at a slower rate. Alternatively, the pin hole and the head may be chilled by a jet of molten inorganic salt, such as a eutectic mixture of sodium nitrate and potassium nitrate, held at a temperature of 250-300‹ C., while the surfaces of the skirt may be chilled by an air blast. In another modification, the head may be highly tempered while the skirt is annealed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US476401XA | 1936-01-31 | 1936-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB476401A true GB476401A (en) | 1937-12-08 |
Family
ID=21950094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1724/37A Expired GB476401A (en) | 1936-01-31 | 1937-01-20 | Improvements in glass insulators for electrical purposes |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB476401A (en) |
| NL (1) | NL46152C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3141063A (en) * | 1960-01-05 | 1964-07-14 | Pilkington Brothers Ltd | Toughened glass, pin type insulator |
| US4471024A (en) * | 1981-10-29 | 1984-09-11 | Ceraver | Method of manufacturing a tempered glass dielectric material for use as an electrical insulator and insulator fabricated therefrom |
-
0
- NL NL46152D patent/NL46152C/xx active
-
1937
- 1937-01-20 GB GB1724/37A patent/GB476401A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3141063A (en) * | 1960-01-05 | 1964-07-14 | Pilkington Brothers Ltd | Toughened glass, pin type insulator |
| US4471024A (en) * | 1981-10-29 | 1984-09-11 | Ceraver | Method of manufacturing a tempered glass dielectric material for use as an electrical insulator and insulator fabricated therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| NL46152C (en) |
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