GB990569A - Improvements in or relating to variable inductors - Google Patents

Improvements in or relating to variable inductors

Info

Publication number
GB990569A
GB990569A GB2376160A GB2376160A GB990569A GB 990569 A GB990569 A GB 990569A GB 2376160 A GB2376160 A GB 2376160A GB 2376160 A GB2376160 A GB 2376160A GB 990569 A GB990569 A GB 990569A
Authority
GB
United Kingdom
Prior art keywords
elements
variable
units
inductor
relating
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
GB2376160A
Inventor
Arthur Bickers
David Pemberton Johnson
Charles Arthur Lea
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2376160A priority Critical patent/GB990569A/en
Priority to GB4888964A priority patent/GB990570A/en
Publication of GB990569A publication Critical patent/GB990569A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/005—Reducing noise, e.g. humm, from the supply
    • 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
    • H01F21/12—Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

990,569. Inductors. PLESSEY CO. Ltd. Aug. 31, 1961 [July 7, 1960], No. 23761/60. Heading H1T. A variable inductor for use at high frequencies comprises a pair of conductors connected by a movable element. The inductor shown consists of two C-shaped conductive elements 13, 14 with an integral end link 15, the effective lengths of these elements being variable by moving a rotatable self-centering arm 23 carrying brush unit 20. One or more similar units may be mounted on the common shaft 25, and may be shielded by plates 8. The assembly may be enclosed in a hermetically sealed casing and an inert liquid such as a long-chain ester may be used to remove by evaporation the heat produced during operation. In a modification the elements 13, 14, 15 may be formed by printed circuit techniques. A number of units may be connected through switches so that the number in circuit may be varied.
GB2376160A 1960-07-07 1960-07-07 Improvements in or relating to variable inductors Expired GB990569A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2376160A GB990569A (en) 1960-07-07 1960-07-07 Improvements in or relating to variable inductors
GB4888964A GB990570A (en) 1960-07-07 1961-08-31 Improvements in or relating to high-frequency power amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2376160A GB990569A (en) 1960-07-07 1960-07-07 Improvements in or relating to variable inductors

Publications (1)

Publication Number Publication Date
GB990569A true GB990569A (en) 1965-04-28

Family

ID=10200897

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2376160A Expired GB990569A (en) 1960-07-07 1960-07-07 Improvements in or relating to variable inductors
GB4888964A Expired GB990570A (en) 1960-07-07 1961-08-31 Improvements in or relating to high-frequency power amplifiers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4888964A Expired GB990570A (en) 1960-07-07 1961-08-31 Improvements in or relating to high-frequency power amplifiers

Country Status (1)

Country Link
GB (2) GB990569A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378795A (en) * 1965-04-29 1968-04-16 Trw Inc Tuneable inductor having a fixed arcuate conductor turn in series with an inductively coupled variable arcuate conductor turn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378795A (en) * 1965-04-29 1968-04-16 Trw Inc Tuneable inductor having a fixed arcuate conductor turn in series with an inductively coupled variable arcuate conductor turn

Also Published As

Publication number Publication date
GB990570A (en) 1965-04-28

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