GB542898A - Electromagnetic coils - Google Patents

Electromagnetic coils

Info

Publication number
GB542898A
GB542898A GB3107/41A GB310741A GB542898A GB 542898 A GB542898 A GB 542898A GB 3107/41 A GB3107/41 A GB 3107/41A GB 310741 A GB310741 A GB 310741A GB 542898 A GB542898 A GB 542898A
Authority
GB
United Kingdom
Prior art keywords
elements
convolutions
march
core
air gap
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
GB3107/41A
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
Publication of GB542898A publication Critical patent/GB542898A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F17/08—Loading coils for telecommunication circuits

Landscapes

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

Abstract

542,898. Inductances. STANDARD TELEPHONES & CABLES, Ltd. March 7, 1941, No. 3107. Convention date, March 13, 1940. [Class 38 (ii)] ] A core for a toroidal coil structure is made by spirally winding magnetic strip material such as " Permalloy " 10, annealing to restore magnetic properties damaged by cold working, cutting through the convolutions to form an air gap 19, and relatively displacing the convolutions as indicated in Fig. 4 to adjust the effective width of the air gap. The core is secured by being pressed into annular recesses in a pair of insulating rings 21, 22 which carry spacing elements 23, 24 between which winding elements 30, 50 are arranged. Terminals 25, 26 are mounted on the elements 23, 24 which together with the rings 21, 22 may be moulded from material such as artificial resin, caesin plastic, cellulose plastic, glass, ceramics, wood or paper pulp.
GB3107/41A 1940-03-13 1941-03-07 Electromagnetic coils Expired GB542898A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US542898XA 1940-03-13 1940-03-13

Publications (1)

Publication Number Publication Date
GB542898A true GB542898A (en) 1942-01-30

Family

ID=21990030

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3107/41A Expired GB542898A (en) 1940-03-13 1941-03-07 Electromagnetic coils

Country Status (1)

Country Link
GB (1) GB542898A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150340A (en) * 1958-06-24 1964-09-22 David C Kalbfell Toroidal core for high-q coil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150340A (en) * 1958-06-24 1964-09-22 David C Kalbfell Toroidal core for high-q coil

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