GB392260A - Improvements in and relating to methods of electrically insulating metals - Google Patents

Improvements in and relating to methods of electrically insulating metals

Info

Publication number
GB392260A
GB392260A GB34985/31A GB3498531A GB392260A GB 392260 A GB392260 A GB 392260A GB 34985/31 A GB34985/31 A GB 34985/31A GB 3498531 A GB3498531 A GB 3498531A GB 392260 A GB392260 A GB 392260A
Authority
GB
United Kingdom
Prior art keywords
relating
methods
electrically insulating
core
solution
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
GB34985/31A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB392260A publication Critical patent/GB392260A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

Magnetic cores built up of several parts or formed by winding an iron band or wire into a spiral are heat treated after formation but before insulation, and then insulated by treatment with a solution of phosphoric acid, which may contain a small amount of manganese dioxide, or with tungsten or molybdenum metaphosphate. In order to allow the solution to penetrate between the portions of the core they may be separated by a porous powder or covered with a material such as starch, paste-or paper which is destroyed by the heat treat, ment or the core may be treated in vacuo.
GB34985/31A 1930-12-17 1931-12-17 Improvements in and relating to methods of electrically insulating metals Expired GB392260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE392260X 1930-12-17

Publications (1)

Publication Number Publication Date
GB392260A true GB392260A (en) 1933-05-18

Family

ID=6384642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34985/31A Expired GB392260A (en) 1930-12-17 1931-12-17 Improvements in and relating to methods of electrically insulating metals

Country Status (1)

Country Link
GB (1) GB392260A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE939364C (en) * 1943-04-16 1956-02-23 Boehler & Co Ag Geb Sintered metallic workpieces with increased elongation
US4113518A (en) * 1976-03-02 1978-09-12 Emerson Electric Co. Method of manufacturing a corrosion resistant rotor assembly
GB2208974A (en) * 1987-08-21 1989-04-19 Johnson Electric Ind Mfg Electric motor armature

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE939364C (en) * 1943-04-16 1956-02-23 Boehler & Co Ag Geb Sintered metallic workpieces with increased elongation
US4113518A (en) * 1976-03-02 1978-09-12 Emerson Electric Co. Method of manufacturing a corrosion resistant rotor assembly
GB2208974A (en) * 1987-08-21 1989-04-19 Johnson Electric Ind Mfg Electric motor armature

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