GB175365A - An electric resistance material and a process for manufacturing same - Google Patents

An electric resistance material and a process for manufacturing same

Info

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
Application number
GB3164120A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Priority to GB3164120A priority Critical patent/GB175365A/en
Priority to US48725621 priority patent/US1516646A/en
Priority to FR548989D priority patent/FR548989A/en
Publication of GB175365A publication Critical patent/GB175365A/en
Expired legal-status Critical Current

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.
GB3164120A 1920-11-09 1920-11-09 An electric resistance material and a process for manufacturing same Expired GB175365A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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