GB723846A - Improvements in or relating to adjustable inductance coils - Google Patents

Improvements in or relating to adjustable inductance coils

Info

Publication number
GB723846A
GB723846A GB2947852A GB2947852A GB723846A GB 723846 A GB723846 A GB 723846A GB 2947852 A GB2947852 A GB 2947852A GB 2947852 A GB2947852 A GB 2947852A GB 723846 A GB723846 A GB 723846A
Authority
GB
United Kingdom
Prior art keywords
core
nov
air gap
relating
type
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
GB2947852A
Inventor
William Frank Glover
Frank Ernest Giles
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 GB2947852A priority Critical patent/GB723846A/en
Publication of GB723846A publication Critical patent/GB723846A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/043—Fixed inductances of the signal type  with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)

Landscapes

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

Abstract

723,846. Inductors. STANDARD TELEPHONES & CABLES, Ltd. Nov. 13, 1953 [Nov. 21, 1952], No. 29478/52. Class 38 (2). A method of adjusting to within fine limits during the process of manufacture the inductance of a coil 3 having a magnetic core comprises the steps of assembling the core in two portions 5, 6 separated by an air gap 7; inserting a non- magnetic hard-setting organic filling material 8 into the air gap, pressing the two parts 5, 6 of the core together whilst the material 8 is still deformable until the desired inductance has been obtained and finally allowing the material 8 to set into a hard solid. The material 8 may be of a type which adheres to the core parts 5, 6 or it may be of a type which does not adhere thereto, in which case the core members are held in clamps. Specification 673,267 is referred to.
GB2947852A 1952-11-21 1952-11-21 Improvements in or relating to adjustable inductance coils Expired GB723846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2947852A GB723846A (en) 1952-11-21 1952-11-21 Improvements in or relating to adjustable inductance coils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2947852A GB723846A (en) 1952-11-21 1952-11-21 Improvements in or relating to adjustable inductance coils

Publications (1)

Publication Number Publication Date
GB723846A true GB723846A (en) 1955-02-09

Family

ID=10292197

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2947852A Expired GB723846A (en) 1952-11-21 1952-11-21 Improvements in or relating to adjustable inductance coils

Country Status (1)

Country Link
GB (1) GB723846A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028570A (en) * 1958-05-19 1962-04-03 Western Union Telegraph Co Ferrite inductance cores
EP1113464A2 (en) * 1999-12-27 2001-07-04 Alcatel USA Sourcing, L.P. Microgapping process for magnetic cores

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028570A (en) * 1958-05-19 1962-04-03 Western Union Telegraph Co Ferrite inductance cores
EP1113464A2 (en) * 1999-12-27 2001-07-04 Alcatel USA Sourcing, L.P. Microgapping process for magnetic cores
EP1113464A3 (en) * 1999-12-27 2002-05-15 Alcatel USA Sourcing, L.P. Microgapping process for magnetic cores

Similar Documents

Publication Publication Date Title
GB708134A (en) Improvements in or relating to magnetic bodies comprising a highly-permeable part and a thin permanent magnet
GB723846A (en) Improvements in or relating to adjustable inductance coils
GB1322092A (en) Method of adjusting the dimensions of sintered ferromagnetic cores
GB756872A (en) Improvements in or relating to magnetic induction accelerators
JPS57187914A (en) Formation of bipolar radial anisotropic magnet
GB731879A (en) Sintered ferrite core of large cross-section
GB1514161A (en) Inductor device
GB734243A (en) Improvements in or relating to ferromagnetic ferrite cores
GB844399A (en) Inductance coil
JPS5244627A (en) Magnet core type speaker
GB477678A (en) Improvements relating to high frequency inductance coils
GB749969A (en) Improvements in or relating to the production of laminated magnetic cores
JPS5654197A (en) Stereo pickup cartridge of moving coil type
CA486935A (en) Core assembly for air inductance coil
CA486767A (en) Method of producing a magnetic material and core thus manufactured
GB743021A (en) Core of sintered ferromagnetic material
GB740543A (en) Methods of manufacturing electrically conductive coils
CA485151A (en) Inductance coil and magnetic core for use on high frequencies
GB776745A (en) Improvements in or relating to inductance coil formers
GB755769A (en) Improvements in or relating to magnet cores of ferrite material
GB881652A (en) Improvements in and relating to magnetic cores and method of making the same
GB516080A (en) Improvements in or relating to high frequency coils of variable inductance
AU162732B2 (en) Improved method for Breaking-up an annular core of ferromagnetic material
GB751703A (en) Improvements in or relating to wound magnetic cores for mounting in preformed electric coils
GB460503A (en) High frequency coil