GB412642A - Improvements in variable inductances - Google Patents

Improvements in variable inductances

Info

Publication number
GB412642A
GB412642A GB71233A GB71233A GB412642A GB 412642 A GB412642 A GB 412642A GB 71233 A GB71233 A GB 71233A GB 71233 A GB71233 A GB 71233A GB 412642 A GB412642 A GB 412642A
Authority
GB
United Kingdom
Prior art keywords
coil
core
inductance
inductances
spindle
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
GB71233A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB71233A priority Critical patent/GB412642A/en
Publication of GB412642A publication Critical patent/GB412642A/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

Landscapes

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

Abstract

412,642. Inductances. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, TURNER, H. C., and POLGREEN, G. R., c/o Salford Electrical Instruments, Ltd., Silk Street, Salford. Jan. 9, 1933, No. 712. [Class 37.] In a variable inductance, a body of magnetic material C is arranged outside the coil B, and the inductance is varied by relative rotation between the coil and a magnetic core A which moves into or out of or through the coil. In one construction, Figs. 1 and 2, the body C completely surrounds the coil and is made in two cylindrical halves, to one of which the coil is secured. A number of inductances may be mounted on a common spindle E to form a gauged inductance unit for wireless receiving sets, initial adjustments of, the individual inductances being made by rotating the portions of the casing C carrying the coils relatively to the spindle. In a modification, the body C encloses the coil only, and not the core A. Both the body C and core A may be made of compressed and insulated magnetic powder. The core A may be tapered, Fig. 5, to give any desired relationship between the value of the inductance and the angular position of the spindle, or the same result may be obtained by shaping the body C so as to vary the air gap in different positions of the core A.
GB71233A 1933-01-09 1933-01-09 Improvements in variable inductances Expired GB412642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB71233A GB412642A (en) 1933-01-09 1933-01-09 Improvements in variable inductances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB71233A GB412642A (en) 1933-01-09 1933-01-09 Improvements in variable inductances

Publications (1)

Publication Number Publication Date
GB412642A true GB412642A (en) 1934-07-05

Family

ID=9709218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB71233A Expired GB412642A (en) 1933-01-09 1933-01-09 Improvements in variable inductances

Country Status (1)

Country Link
GB (1) GB412642A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757078C (en) * 1935-11-20 1954-02-01 Siemens & Halske A G High frequency variometer with two nested spherical or cylindrical coils
DE910783C (en) * 1938-08-04 1954-05-06 Siemens Ag Multiple variometer
DE965725C (en) * 1953-10-10 1957-06-19 Siemens Ag Changeable inductance with large variation of the inductance value
DE970499C (en) * 1942-04-19 1958-09-25 Siemens Ag Rotary slide variometer
DE973181C (en) * 1944-06-27 1959-12-17 Georg Von Dipl-Ing Schaub Tuning arrangement for short shafts

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757078C (en) * 1935-11-20 1954-02-01 Siemens & Halske A G High frequency variometer with two nested spherical or cylindrical coils
DE910783C (en) * 1938-08-04 1954-05-06 Siemens Ag Multiple variometer
DE970499C (en) * 1942-04-19 1958-09-25 Siemens Ag Rotary slide variometer
DE973181C (en) * 1944-06-27 1959-12-17 Georg Von Dipl-Ing Schaub Tuning arrangement for short shafts
DE965725C (en) * 1953-10-10 1957-06-19 Siemens Ag Changeable inductance with large variation of the inductance value

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