GB712124A - Improvements in or relating to electrical transformers or inductors - Google Patents

Improvements in or relating to electrical transformers or inductors

Info

Publication number
GB712124A
GB712124A GB2262052A GB2262052A GB712124A GB 712124 A GB712124 A GB 712124A GB 2262052 A GB2262052 A GB 2262052A GB 2262052 A GB2262052 A GB 2262052A GB 712124 A GB712124 A GB 712124A
Authority
GB
United Kingdom
Prior art keywords
limb
transformer
main
inductors
varied
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
GB2262052A
Inventor
John Wemyss Mcpherson
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB2262052A priority Critical patent/GB712124A/en
Publication of GB712124A publication Critical patent/GB712124A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

712,124. Transformers and inductors. POSTMASTER GENERAL. Nov. 18, 1952 [Sept. 27, 1951], No. 22620/51. Class 38(2) A transformer or inductor whose loss over a given frequency band or attenuation-frequency characteristic can be varied, comprises a core having one or more limbs 1 carrying the main windings 6, 9, a limb 3 carrying a winding 12 which forms or supplies a subsidiary load, and a saturable limb 2 which shorts limb 3. Direct current is passed through a main or other winding on limb 1, producing a flux in limb' 2 which saturates to a controlled extent, and the main flux is proportionately diverted to limb 3, where it induces voltage in windings 12. Thus the loss in the transformer is varied by changes in the D.C. and each value of D.C. gives a corresponding attenuation - frequency characteristic. The D.C. may be replaced by a permanent magnet. A transformer according to the invention may be used in a telephone system as described in Specification 712,123, [Group XXXIX].
GB2262052A 1951-09-27 1951-09-27 Improvements in or relating to electrical transformers or inductors Expired GB712124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2262052A GB712124A (en) 1951-09-27 1951-09-27 Improvements in or relating to electrical transformers or inductors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2262052A GB712124A (en) 1951-09-27 1951-09-27 Improvements in or relating to electrical transformers or inductors

Publications (1)

Publication Number Publication Date
GB712124A true GB712124A (en) 1954-07-21

Family

ID=10182387

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2262052A Expired GB712124A (en) 1951-09-27 1951-09-27 Improvements in or relating to electrical transformers or inductors

Country Status (1)

Country Link
GB (1) GB712124A (en)

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