GB441982A - Improvements in or relating to variable inductance coils - Google Patents

Improvements in or relating to variable inductance coils

Info

Publication number
GB441982A
GB441982A GB2163735A GB2163735A GB441982A GB 441982 A GB441982 A GB 441982A GB 2163735 A GB2163735 A GB 2163735A GB 2163735 A GB2163735 A GB 2163735A GB 441982 A GB441982 A GB 441982A
Authority
GB
United Kingdom
Prior art keywords
coil
inductance
ferro
variable inductance
plunger
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
GB2163735A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Priority to GB2163735A priority Critical patent/GB441982A/en
Publication of GB441982A publication Critical patent/GB441982A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
    • H01F21/065—Measures for obtaining a desired relation between the position of the core and the inductance

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

441,982. Inductances. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.- (Telefunken Ges. f³r drahtlose Telegraphie; 12, Hallesches Ufer, Berlin) July 30, 1935, No. 21637. [Class 37] A ferro-magnetically cored variable inductance coil for use in radio and similar circuits is provided with a suppfementary member of ferro-magnetic material for enabling the law of variation of inductance of the coil to be adjusted after manufacture, said supplementary member being additional to the means provided for varying the inductance of the coil when in use, and being adapted to be moved in position until the required law is obtained, its position in the assembly being then fixed. In the form shown, the inductance of the coil 1 is varied in use by moving in and out a ferro-magnetic plunger 3, and the supplementary member 4 is of elongated form and arranged with its length parallel to the direction of movement of the plunger.
GB2163735A 1935-07-30 1935-07-30 Improvements in or relating to variable inductance coils Expired GB441982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2163735A GB441982A (en) 1935-07-30 1935-07-30 Improvements in or relating to variable inductance coils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2163735A GB441982A (en) 1935-07-30 1935-07-30 Improvements in or relating to variable inductance coils

Publications (1)

Publication Number Publication Date
GB441982A true GB441982A (en) 1936-01-30

Family

ID=10166283

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2163735A Expired GB441982A (en) 1935-07-30 1935-07-30 Improvements in or relating to variable inductance coils

Country Status (1)

Country Link
GB (1) GB441982A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423824A (en) * 1943-04-10 1947-07-15 Collins Radio Co Inductive tuning
US2572455A (en) * 1949-10-22 1951-10-23 Ulysses S Dunn Transformer
US2642559A (en) * 1948-12-11 1953-06-16 Hartford Nat Bank & Trust Co Inductance coil of the sliding core type
DE977465C (en) * 1948-11-20 1966-07-14 Philips Nv Dual-circuit band filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423824A (en) * 1943-04-10 1947-07-15 Collins Radio Co Inductive tuning
DE977465C (en) * 1948-11-20 1966-07-14 Philips Nv Dual-circuit band filter
US2642559A (en) * 1948-12-11 1953-06-16 Hartford Nat Bank & Trust Co Inductance coil of the sliding core type
US2572455A (en) * 1949-10-22 1951-10-23 Ulysses S Dunn Transformer

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