GB739942A - Improvements in or relating to inductors - Google Patents

Improvements in or relating to inductors

Info

Publication number
GB739942A
GB739942A GB528754A GB528754A GB739942A GB 739942 A GB739942 A GB 739942A GB 528754 A GB528754 A GB 528754A GB 528754 A GB528754 A GB 528754A GB 739942 A GB739942 A GB 739942A
Authority
GB
United Kingdom
Prior art keywords
case
cover
core
core parts
parts
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
GB528754A
Inventor
William Frank Glover
Douglas Hiley Owen
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB528754A priority Critical patent/GB739942A/en
Publication of GB739942A publication Critical patent/GB739942A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets

Landscapes

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

Abstract

739,942. Inductors. STANDARD TELE. PHONES & CABLES, Ltd. Feb. 23, 1954, No. 5287/54. Class 38 (2). A variable inductor comprises a core including two parts 16, 27 of magnetic ferrite each having a projection to form a central stem around which is placed the coil 19 on a former 18, and cemented respectively to a conducting case 11 and its cover 10 so that upon rotation of this cover relative to the case, the two core parts rotate relatively so as to vary the shape of the airgap lying between the opposing faces of the core parts. These faces are inclined at an angle to a plane perpendicular to the core axis. The magnetic circuit is completed by a cylinder 20 of magnetic ferrite surrounding the coil 19, and provide continuous force to hold the core parts together, the cover 10 is made of corrugated resilient metal such as beryllium copper. The cover 10 is clipped on the case 11 and held in position by a circlip 31 which is located in indentations in both cover and case, whereby relative rotation without axial movement is possible. The terminals 24 are mounted on plate 25 covering a hole in the case, and feet are formed from base 14 of the case. To make the inductance core permeability independent of temperature core parts 16, 27 may have suitable positive and cylinder 20 suitable negative temperature coefficients of permeability. Specification 723,846 is referred to.
GB528754A 1954-02-23 1954-02-23 Improvements in or relating to inductors Expired GB739942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB528754A GB739942A (en) 1954-02-23 1954-02-23 Improvements in or relating to inductors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB528754A GB739942A (en) 1954-02-23 1954-02-23 Improvements in or relating to inductors

Publications (1)

Publication Number Publication Date
GB739942A true GB739942A (en) 1955-11-02

Family

ID=9793276

Family Applications (1)

Application Number Title Priority Date Filing Date
GB528754A Expired GB739942A (en) 1954-02-23 1954-02-23 Improvements in or relating to inductors

Country Status (1)

Country Link
GB (1) GB739942A (en)

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