GB720731A - Improvements in and relating to high frequency electric transformers - Google Patents

Improvements in and relating to high frequency electric transformers

Info

Publication number
GB720731A
GB720731A GB4789/53A GB478953A GB720731A GB 720731 A GB720731 A GB 720731A GB 4789/53 A GB4789/53 A GB 4789/53A GB 478953 A GB478953 A GB 478953A GB 720731 A GB720731 A GB 720731A
Authority
GB
United Kingdom
Prior art keywords
windings
bodies
spiral
insulating
seals
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
GB4789/53A
Inventor
William Frank Glover
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 GB4789/53A priority Critical patent/GB720731A/en
Priority to NL185057A priority patent/NL94465C/en
Priority to DEI8296A priority patent/DE954804C/en
Publication of GB720731A publication Critical patent/GB720731A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • 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
    • H03H7/0176—Intermediate frequency filters witout magnetic core

Landscapes

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

Abstract

720,731. Transformers. STANDARD TELEPHONES & CABLES, Ltd. Feb. 20, 1953, No. 4789/53. Class 38 (2). A high-frequency transformer comprises two insulating bodies 3, 4, each having at least one flat surface, two flat spiral conducting windings 5, 6 being each mounted on a flat surface of a corresponding one of the insulating bodies, and a tubular casing 1 of an insulating material within which are mounted the two bodies with the spiral windings facing one another and conducting leads 2 to which the ends of the spiral windings are connected. The spiral windings are placed on the flat surfaces of the insulating bodies and secured thereto by an adhesive such as a cellulose cement. Before the adhesive is set and after the outer end of the winding has been attached to a lead 2 the inner end is drawn through the centre hole 8 until the desired selfinductance of the winding is obtained. The two windings are then inserted in the tube 1 face-to-face, the mutual inductance being determined by the axial distance between the windings according to the amount of filling 7 used. Seals 10 secure the bodies in the tube, the seals 10 and the filling 7 may be of similar material such as a mineral wax or a synthetic resin.
GB4789/53A 1953-02-20 1953-02-20 Improvements in and relating to high frequency electric transformers Expired GB720731A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4789/53A GB720731A (en) 1953-02-20 1953-02-20 Improvements in and relating to high frequency electric transformers
NL185057A NL94465C (en) 1953-02-20 1954-02-12 PROCEDURE FOR MOUNTING WINDINGS FOR A HIGH-FREQUENCY TRANSFORMER
DEI8296A DE954804C (en) 1953-02-20 1954-02-20 Short wave transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4789/53A GB720731A (en) 1953-02-20 1953-02-20 Improvements in and relating to high frequency electric transformers

Publications (1)

Publication Number Publication Date
GB720731A true GB720731A (en) 1954-12-22

Family

ID=9783839

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4789/53A Expired GB720731A (en) 1953-02-20 1953-02-20 Improvements in and relating to high frequency electric transformers

Country Status (3)

Country Link
DE (1) DE954804C (en)
GB (1) GB720731A (en)
NL (1) NL94465C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431758A1 (en) * 1978-07-21 1980-02-15 Telettra Lab Telefon INDUCTANCE FORMED FROM A GROUP OF COILS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR384617A (en) * 1907-12-03 1908-04-15 Michel Peri Device for wireless telegraphy
GB473622A (en) * 1936-04-17 1937-10-18 Kolster Brandes Ltd Improvements in or relating to inductance coils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431758A1 (en) * 1978-07-21 1980-02-15 Telettra Lab Telefon INDUCTANCE FORMED FROM A GROUP OF COILS

Also Published As

Publication number Publication date
NL94465C (en) 1960-06-15
DE954804C (en) 1956-12-20

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