GB175365A - An electric resistance material and a process for manufacturing same - Google Patents
An electric resistance material and a process for manufacturing sameInfo
- Publication number
- GB175365A GB175365A GB3164120A GB3164120A GB175365A GB 175365 A GB175365 A GB 175365A GB 3164120 A GB3164120 A GB 3164120A GB 3164120 A GB3164120 A GB 3164120A GB 175365 A GB175365 A GB 175365A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxide
- copper
- molten
- resistance
- increased
- 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
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
-
- 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
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Silicon Compounds (AREA)
Abstract
A material which is probably a mixture of cuprous and cupric oxides and is obtained by fusing cupric oxide, is used as an electric resistance of the type having a negative temperature coefficient of resistivity. The material may be produced by striking an electric arc between copper electrodes in contact with copper oxide, preferably in the form of a block formed by compressing and heating a mixture of powdered cupric oxide and water, the electrodes being gradually separated without breaking contact with the block so that the current flows through a molten path in the surface of the oxide owing to the reduced resistance of the molten oxide, and the material being collected from this molten path. If direct current is used, the material collected near the positive electrode is a greater specific resistance than that collected near the negative electrode, this variation being increased by increasing the current. The resistance of the material at normal temperature may be increased or decreased by subsequent heating in an oxidizing or reducing atmosphere. The molten path may be maintained or increased by the addition of copper or powdered copper oxide. According to the Provisional Specification, the block of copper oxide used in the fusion process may be formed by melting the oxide in a crucible and allowing it to cool.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3164120A GB175365A (en) | 1920-11-09 | 1920-11-09 | An electric resistance material and a process for manufacturing same |
US48725621 US1516646A (en) | 1920-11-09 | 1921-07-25 | Electric resistance material and process for manufacturing the same |
FR548989D FR548989A (en) | 1920-11-09 | 1921-07-27 | Improved raw materials for electrical resistances and process for their manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3164120A GB175365A (en) | 1920-11-09 | 1920-11-09 | An electric resistance material and a process for manufacturing same |
Publications (1)
Publication Number | Publication Date |
---|---|
GB175365A true GB175365A (en) | 1922-02-09 |
Family
ID=10326198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3164120A Expired GB175365A (en) | 1920-11-09 | 1920-11-09 | An electric resistance material and a process for manufacturing same |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR548989A (en) |
GB (1) | GB175365A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE746742C (en) * | 1934-06-05 | 1944-06-21 | Siemens Ag | Hot conductor (electrical resistance with negative temperature coefficient) for small control power |
-
1920
- 1920-11-09 GB GB3164120A patent/GB175365A/en not_active Expired
-
1921
- 1921-07-27 FR FR548989D patent/FR548989A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE746742C (en) * | 1934-06-05 | 1944-06-21 | Siemens Ag | Hot conductor (electrical resistance with negative temperature coefficient) for small control power |
Also Published As
Publication number | Publication date |
---|---|
FR548989A (en) | 1923-01-30 |
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