GB438130A - Improvements in or relating to contact devices having variable electric resistance characteristics and process for manufacturing material used therewith - Google Patents
Improvements in or relating to contact devices having variable electric resistance characteristics and process for manufacturing material used therewithInfo
- Publication number
- GB438130A GB438130A GB1411534A GB1411534A GB438130A GB 438130 A GB438130 A GB 438130A GB 1411534 A GB1411534 A GB 1411534A GB 1411534 A GB1411534 A GB 1411534A GB 438130 A GB438130 A GB 438130A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur
- copper
- relating
- material used
- electric resistance
- 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
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/10—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances sulfides
Landscapes
- Contacts (AREA)
- Manufacture Of Switches (AREA)
Abstract
Material with asymmetric conductivity, for use for example in p rectifiers, is made by heating together copper and sulphur, the former being in excess of the amount necessary to form cuprous sulphide, to a temperature of about 1100--1200 DEG C. until substantially complete combination of copper and sulphur is obtained. In one example, substantially four parts of copper to one of sulphur are slowly heated in a loosely closed vessel in a furnace until the sulphur begins to burn, the heat being gradually increased to 1200 DEG C. and maintained for about five minutes, the mixture being then poured into a container and allowed to cool. The cooled material may be ground to a fine powder and compressed at a pressure of from 7 to 23 tons per square inch into the form in which it is required for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1411534A GB438130A (en) | 1934-05-10 | 1934-05-10 | Improvements in or relating to contact devices having variable electric resistance characteristics and process for manufacturing material used therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1411534A GB438130A (en) | 1934-05-10 | 1934-05-10 | Improvements in or relating to contact devices having variable electric resistance characteristics and process for manufacturing material used therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB438130A true GB438130A (en) | 1935-11-11 |
Family
ID=10035253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1411534A Expired GB438130A (en) | 1934-05-10 | 1934-05-10 | Improvements in or relating to contact devices having variable electric resistance characteristics and process for manufacturing material used therewith |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB438130A (en) |
-
1934
- 1934-05-10 GB GB1411534A patent/GB438130A/en not_active Expired
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