GB749370A - Improvements in or relating to sealed components - Google Patents

Improvements in or relating to sealed components

Info

Publication number
GB749370A
GB749370A GB480653A GB480653A GB749370A GB 749370 A GB749370 A GB 749370A GB 480653 A GB480653 A GB 480653A GB 480653 A GB480653 A GB 480653A GB 749370 A GB749370 A GB 749370A
Authority
GB
United Kingdom
Prior art keywords
component
polyvinyl chloride
paste
feb
embedding
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
GB480653A
Inventor
Beaumont John Davies
Walter Henry Parriss
Ronald Snadow
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB480653A priority Critical patent/GB749370A/en
Publication of GB749370A publication Critical patent/GB749370A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
    • 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
    • H01F41/005—Impregnating or encapsulating

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulating Of Coils (AREA)

Abstract

749,370. Transformers and inductors. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 18, 1954 [Feb. 20, 1953], No. 4806/53. Class 38 (2). [Also in Group XL (c)] An electrical component such as an inductor 1 is protected by embedding it in an insulating casing which comprises a cushioning member 4, the casing being made by the method which consists in heating the component to a temperature of about 120‹ C., embedding the component or part thereof in a polyvinyl chloride paste capable of foaming when heated, heating the coated component in a mould shaped to contain the foaming polyvinyl chloride around the component, removing the coated component from the mould and casting a mineral filled polyester resin body 5 around the coated component to completely embed it therein. The expanded polyvinyl chloride is produced from a paste consisting of a dispersion of polyvinyl chloride in a plasticizer to which is added a compound which liberates a gas, e.g. nitrogen, at a temperature in the region of 100‹ C. The Specification contains examples of compounds releasing nitrogen under these conditions, such compounds sometimes being called " blowing agents." An example is also given of the composition of a suitable paste.
GB480653A 1953-02-20 1953-02-20 Improvements in or relating to sealed components Expired GB749370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB480653A GB749370A (en) 1953-02-20 1953-02-20 Improvements in or relating to sealed components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB480653A GB749370A (en) 1953-02-20 1953-02-20 Improvements in or relating to sealed components

Publications (1)

Publication Number Publication Date
GB749370A true GB749370A (en) 1956-05-23

Family

ID=9784165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB480653A Expired GB749370A (en) 1953-02-20 1953-02-20 Improvements in or relating to sealed components

Country Status (1)

Country Link
GB (1) GB749370A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670091A (en) * 1971-05-20 1972-06-13 Sqrague Electric Co Encapsulated electrical components with protective pre-coat containing collapsible microspheres
US4707678A (en) * 1985-02-07 1987-11-17 Westinghouse Electric Corp. Consolidated magnetic core containing amorphous metal
US4866409A (en) * 1987-12-03 1989-09-12 Mitsubishi Denki Kabushiki Kaisha Resin-crack prevented high-voltage transformer
CN103247414A (en) * 2012-02-09 2013-08-14 三积瑞科技（苏州）有限公司 Encapsulation type inductor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670091A (en) * 1971-05-20 1972-06-13 Sqrague Electric Co Encapsulated electrical components with protective pre-coat containing collapsible microspheres
US4707678A (en) * 1985-02-07 1987-11-17 Westinghouse Electric Corp. Consolidated magnetic core containing amorphous metal
US4866409A (en) * 1987-12-03 1989-09-12 Mitsubishi Denki Kabushiki Kaisha Resin-crack prevented high-voltage transformer
CN103247414A (en) * 2012-02-09 2013-08-14 三积瑞科技（苏州）有限公司 Encapsulation type inductor

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