GB626266A - Improvements in or relating to transformers - Google Patents

Improvements in or relating to transformers

Info

Publication number
GB626266A
GB626266A GB23165/47A GB2316547A GB626266A GB 626266 A GB626266 A GB 626266A GB 23165/47 A GB23165/47 A GB 23165/47A GB 2316547 A GB2316547 A GB 2316547A GB 626266 A GB626266 A GB 626266A
Authority
GB
United Kingdom
Prior art keywords
coils
shield
units
aug
coil
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
GB23165/47A
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
Publication of GB626266A publication Critical patent/GB626266A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • H03H7/0184—Intermediate frequency filters with ferromagnetic core

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

626,266. Transformers. PLESSEY CO., Ltd. Aug. 21, 1947, No. 23165. Convention date, Aug. 28, 1946. [Class 38 (ii)] [Also in Group XL (c)] In order to reduce the di mensions of and inductivi losses in a metallic shield can 22, 23 of a transformer e.g. an intermediate fre quency transformer in a radio receiver, the coil unit 11, 12, comprising coils 18 19, wound on powdered magnetic cores 14 ar mounted in a structure 10 of powdered magnetic material to form a closed magnetic circuit, thereby eliminating stray fields and allowing the shield can to closely surround the structure 10. The cores 14 are provided with longitudinal and diametric slots to house the coils and the coupling is adjusted by rotation of the coil units relative to each other, the units being fixed, after adjustment, by a sealing compound. Alternatively the coils may be housed in circumferential slots in which case the coupling is adjusted by moving the units longitudinally relative to each other. An insulating member may be interposed between the shield can and the structure 10, the can being apertured to permit trimming condensers 25, 26, connected respectively in parallel with the adjacent coil, to be mounted therein and to permit adjustment of the condensers.
GB23165/47A 1946-08-28 1947-08-21 Improvements in or relating to transformers Expired GB626266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US626266XA 1946-08-28 1946-08-28

Publications (1)

Publication Number Publication Date
GB626266A true GB626266A (en) 1949-07-12

Family

ID=22043737

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23165/47A Expired GB626266A (en) 1946-08-28 1947-08-21 Improvements in or relating to transformers

Country Status (1)

Country Link
GB (1) GB626266A (en)

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