GB616240A - Improvements in or relating to electric coils, and more especially to variable inductors for permeability tuning - Google Patents

Improvements in or relating to electric coils, and more especially to variable inductors for permeability tuning

Info

Publication number
GB616240A
GB616240A GB2627846A GB2627846A GB616240A GB 616240 A GB616240 A GB 616240A GB 2627846 A GB2627846 A GB 2627846A GB 2627846 A GB2627846 A GB 2627846A GB 616240 A GB616240 A GB 616240A
Authority
GB
United Kingdom
Prior art keywords
coil
embedded
insulating material
core
mandrel
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
GB2627846A
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.)
WILLIAM MORGAN PANNELL
Pye Electronic Products Ltd
Original Assignee
WILLIAM MORGAN PANNELL
Pye 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 WILLIAM MORGAN PANNELL, Pye Ltd filed Critical WILLIAM MORGAN PANNELL
Priority to GB2627846A priority Critical patent/GB616240A/en
Publication of GB616240A publication Critical patent/GB616240A/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

616,240. Inductances. PANNELL, W. M., SHILLING, A. H., and PYE, Ltd. Aug. 31, 1946, No. 26278. [Class 38 (ii)] [Also in Groups V and XL (c)] A variable inductor comprises a coil with a coaxial moving core, which coil is embedded in a body of non-magnetic insulating material so that there is only a thin wall of insulating material between the body and the bore in which the core moves. A coil 1 is wound over one or more layers of tape which may be of plastic such as polythene on a mandrel. A cylindrical insulating body 2 with a plate projection 4 is moulded, for example by injection, round the coil and mandrel. The latter is then removed leaving a cylindrical hole 5 through which the permeable core 6 can pass separated from the coil 1 by the thickness of the tape only. Fig. 4 shows two such inductors 15, 18 each with an associated condenser 14, 17 embedded in a single block 12 of moulded insulating material. Rotation of a rod 21 mounted in brackets on the end of a metal screen 22 embedded between the two coils 15 18 moves a cord 20 which passes round a pulley 23 and carries the two cores 16, 19. Two circuits are thus tuned simultaneously.
GB2627846A 1946-08-31 1946-08-31 Improvements in or relating to electric coils, and more especially to variable inductors for permeability tuning Expired GB616240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2627846A GB616240A (en) 1946-08-31 1946-08-31 Improvements in or relating to electric coils, and more especially to variable inductors for permeability tuning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2627846A GB616240A (en) 1946-08-31 1946-08-31 Improvements in or relating to electric coils, and more especially to variable inductors for permeability tuning

Publications (1)

Publication Number Publication Date
GB616240A true GB616240A (en) 1949-01-18

Family

ID=10241124

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2627846A Expired GB616240A (en) 1946-08-31 1946-08-31 Improvements in or relating to electric coils, and more especially to variable inductors for permeability tuning

Country Status (1)

Country Link
GB (1) GB616240A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677112A (en) * 1951-01-13 1954-04-27 Westinghouse Electric Corp Inductance tuning mechanism
US2738466A (en) * 1950-04-13 1956-03-13 Motorola Inc Method of constructing and electrical filter
DE1004249B (en) * 1952-02-23 1957-03-14 Siemens Ag Oscillating or filter circuit coil that can be suspended from its power supply lines
US3218591A (en) * 1960-05-09 1965-11-16 Automated Specialties Inc Transducer assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738466A (en) * 1950-04-13 1956-03-13 Motorola Inc Method of constructing and electrical filter
US2677112A (en) * 1951-01-13 1954-04-27 Westinghouse Electric Corp Inductance tuning mechanism
DE1004249B (en) * 1952-02-23 1957-03-14 Siemens Ag Oscillating or filter circuit coil that can be suspended from its power supply lines
US3218591A (en) * 1960-05-09 1965-11-16 Automated Specialties Inc Transducer assembly

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