GB419439A - Improvements in and relating to methods of manufacturing electric cut-outs - Google Patents
Improvements in and relating to methods of manufacturing electric cut-outsInfo
- Publication number
- GB419439A GB419439A GB413833A GB413833A GB419439A GB 419439 A GB419439 A GB 419439A GB 413833 A GB413833 A GB 413833A GB 413833 A GB413833 A GB 413833A GB 419439 A GB419439 A GB 419439A
- Authority
- GB
- United Kingdom
- Prior art keywords
- outs
- followed
- cooling
- copper
- temperature
- 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
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
Copper oxide cut-outs are made by heating copper at a temperature just below its melting point, preferably about 1000 DEG C., to form a layer of red copper oxide, and the conditions of cooling are then controlled to give the required breakdown value. The heated metal may be cooled gradually to room temperature, in which case the breakdown value varies inversely with the rate of cooling. Alternatively the heat treatment to form the layer of oxide may be followed by an anneal at a lower temperature e.g. from 150-600 DEG C., the metal being then either cooled slowly to room temperature or quenched. Examples are given in which copper is first heated at 1010 DEG C. and then annealed at a lower temperature, in one case at 150 DEG C. followed by slow cooling and in another at 480 DEG C. followed by quenching, the latter giving a lower breakdown value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB413833A GB419439A (en) | 1933-02-10 | 1933-02-10 | Improvements in and relating to methods of manufacturing electric cut-outs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB413833A GB419439A (en) | 1933-02-10 | 1933-02-10 | Improvements in and relating to methods of manufacturing electric cut-outs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB419439A true GB419439A (en) | 1934-11-12 |
Family
ID=9771470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB413833A Expired GB419439A (en) | 1933-02-10 | 1933-02-10 | Improvements in and relating to methods of manufacturing electric cut-outs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB419439A (en) |
-
1933
- 1933-02-10 GB GB413833A patent/GB419439A/en not_active Expired
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