GB298990A - Improvements in or relating to inductances for use in high frequency circuits, for example, in radio receiving sets - Google Patents

Improvements in or relating to inductances for use in high frequency circuits, for example, in radio receiving sets

Info

Publication number
GB298990A
GB298990A GB30180/28A GB3018028A GB298990A GB 298990 A GB298990 A GB 298990A GB 30180/28 A GB30180/28 A GB 30180/28A GB 3018028 A GB3018028 A GB 3018028A GB 298990 A GB298990 A GB 298990A
Authority
GB
United Kingdom
Prior art keywords
coil
inductances
ring
adjustment
shield
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
GB30180/28A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB298990A publication Critical patent/GB298990A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers

Landscapes

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

Abstract

298,990. Siemens & Halske Akt.- Ges. Oct. 18, 1927, [Convention date]. Inductances.-In radio apparatus having associated circuits including inductance coils, inequalities of manufacture are compensated for and the inductances of the coils equalized by adjustment of a ring or disc of good conducting material within the coil, the ring &c. being positively fixed in position once and for all when the adjustment has been made. A jointless copper ring 4 cut from a tube may be adjusted inside a cylindrical coil 2 in a conductive shield 3. A rod 5 allows adjustment of the inductance without removing the shield 3, and is finally fixed in position by bending and soldering to the shield 3. In a modification, the coil is not shielded and a copper disc axially adjusted within the coil is carried by a rod held by a set-screw in an end-plate of the coil-former.
GB30180/28A 1927-10-18 1928-10-18 Improvements in or relating to inductances for use in high frequency circuits, for example, in radio receiving sets Expired GB298990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE298990X 1927-10-18

Publications (1)

Publication Number Publication Date
GB298990A true GB298990A (en) 1929-08-22

Family

ID=6091142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30180/28A Expired GB298990A (en) 1927-10-18 1928-10-18 Improvements in or relating to inductances for use in high frequency circuits, for example, in radio receiving sets

Country Status (1)

Country Link
GB (1) GB298990A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423824A (en) * 1943-04-10 1947-07-15 Collins Radio Co Inductive tuning
US3157849A (en) * 1960-12-02 1964-11-17 Siemens Ag Brushiless variometer for an extended frequency range

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423824A (en) * 1943-04-10 1947-07-15 Collins Radio Co Inductive tuning
US3157849A (en) * 1960-12-02 1964-11-17 Siemens Ag Brushiless variometer for an extended frequency range

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