GB663569A - Improvements in and relating to clamping devices for magnetic cores - Google Patents

Improvements in and relating to clamping devices for magnetic cores

Info

Publication number
GB663569A
GB663569A GB31369/48A GB3136948A GB663569A GB 663569 A GB663569 A GB 663569A GB 31369/48 A GB31369/48 A GB 31369/48A GB 3136948 A GB3136948 A GB 3136948A GB 663569 A GB663569 A GB 663569A
Authority
GB
United Kingdom
Prior art keywords
core
laminations
legs
clamps
dec
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
GB31369/48A
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
Publication of GB663569A publication Critical patent/GB663569A/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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

663,569. Transformers and inductances. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 3, 1948 [Dec. 4, 1947], No. 31369/48. Class 38 (ii). Relates to a laminated magnetic core having a clamp for holding the laminations tightly together comprising a one-piece metal member which is shrunk around the core. As shown, a fluorescent lamp ballast is constructed from stacked laminations of ferro-magnetic material and comprises outer core legs 3, 4, and a centre core leg 5 which carries coils 6, 7, 8. The laminations and core-sections are held together by cast metal clamps 9, 10. The method of assembly consists in first stacking the laminations of the centre core, mounting the coils, and inserting a wedge 12. The outer core legs are stacked and aligned, the three legs being placed temporarily in adjustable clamps 14, 16. A split mould 18, 19 is filled with molten type metal or other similar non-magnetic material having a relatively low melting-point and which contracts as it cools and hardens. Grooves 11 provide for locking-keys formed as integral parts of the clamps.
GB31369/48A 1947-12-04 1948-12-03 Improvements in and relating to clamping devices for magnetic cores Expired GB663569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US663569XA 1947-12-04 1947-12-04

Publications (1)

Publication Number Publication Date
GB663569A true GB663569A (en) 1951-12-27

Family

ID=22068977

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31369/48A Expired GB663569A (en) 1947-12-04 1948-12-03 Improvements in and relating to clamping devices for magnetic cores

Country Status (1)

Country Link
GB (1) GB663569A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061225A1 (en) * 1981-03-25 1982-09-29 Koninklijke Philips Electronics N.V. Stabilization ballast for operating a gas and/or vapour discharge lamp
US4673907A (en) * 1985-12-19 1987-06-16 General Electric Company Transformer with amorphous alloy core having chip containment means
WO1987004001A1 (en) * 1985-12-19 1987-07-02 General Electric Company Transformer with amorphous alloy core having chip containment means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061225A1 (en) * 1981-03-25 1982-09-29 Koninklijke Philips Electronics N.V. Stabilization ballast for operating a gas and/or vapour discharge lamp
US4673907A (en) * 1985-12-19 1987-06-16 General Electric Company Transformer with amorphous alloy core having chip containment means
WO1987004001A1 (en) * 1985-12-19 1987-07-02 General Electric Company Transformer with amorphous alloy core having chip containment means

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