GB435038A - Improvements in or relating to audio frequency transformers - Google Patents

Improvements in or relating to audio frequency transformers

Info

Publication number
GB435038A
GB435038A GB7695/34A GB769534A GB435038A GB 435038 A GB435038 A GB 435038A GB 7695/34 A GB7695/34 A GB 7695/34A GB 769534 A GB769534 A GB 769534A GB 435038 A GB435038 A GB 435038A
Authority
GB
United Kingdom
Prior art keywords
core
high permeability
windings
laminations
fluxes
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
GB7695/34A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB7695/34A priority Critical patent/GB435038A/en
Publication of GB435038A publication Critical patent/GB435038A/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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material

Abstract

435,038. Transformers; inductances. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, and ROUND, H. J., Westfield, Muswell Hill, both in London. March 10, 1934, No. 7695. [Class 38 (ii)] [See also Group XXXVI] An audio-frequency transformer or choke comprises a ferromagnetic core carrying windings so arranged and connected as to be astatic as regards the leakage fluxes, the main fluxes being additive while a ring-like body of high permeability material is spaced from the core and provides a closed magnetic path surrounding the core and approximately parallel to the main field therein. Windings W1 W2, each composed of a primary and secondary section, are carried on a core formed of L-shaped laminations CL, CL2 " butted " together, the joints in the laminations being staggered and vibration being prevented by clamps U1, U2, U3, U4. The core is surrounded by a high permeability rectangular ring R, the depth of which is about equal to the coil diameter. The ends of the body R may be closed by end caps of non-magnetic material. The core may contain a small air gap and may be made of any convenient shape such as a circular form, the body R having a corresponding shape. Similar constructions can be used for chokes.
GB7695/34A 1934-03-10 1934-03-10 Improvements in or relating to audio frequency transformers Expired GB435038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7695/34A GB435038A (en) 1934-03-10 1934-03-10 Improvements in or relating to audio frequency transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7695/34A GB435038A (en) 1934-03-10 1934-03-10 Improvements in or relating to audio frequency transformers

Publications (1)

Publication Number Publication Date
GB435038A true GB435038A (en) 1935-09-10

Family

ID=9838006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7695/34A Expired GB435038A (en) 1934-03-10 1934-03-10 Improvements in or relating to audio frequency transformers

Country Status (1)

Country Link
GB (1) GB435038A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270305A (en) * 1965-03-18 1966-08-30 Gen Electric Shielded housing with vibration control
FR2509083A1 (en) * 1981-07-04 1983-01-07 Philips Nv TRANSFORMER WITH MAGNETIC SHIELDING

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270305A (en) * 1965-03-18 1966-08-30 Gen Electric Shielded housing with vibration control
FR2509083A1 (en) * 1981-07-04 1983-01-07 Philips Nv TRANSFORMER WITH MAGNETIC SHIELDING

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