GB536412A - Improvements in or relating to wireless receivers with band spreading - Google Patents

Improvements in or relating to wireless receivers with band spreading

Info

Publication number
GB536412A
GB536412A GB27623/39A GB2762339A GB536412A GB 536412 A GB536412 A GB 536412A GB 27623/39 A GB27623/39 A GB 27623/39A GB 2762339 A GB2762339 A GB 2762339A GB 536412 A GB536412 A GB 536412A
Authority
GB
United Kingdom
Prior art keywords
tuning
inductance
coil
approximate
fine tuning
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
GB27623/39A
Other languages
English (en)
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB536412A publication Critical patent/GB536412A/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
    • H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
    • H01F21/065—Measures for obtaining a desired relation between the position of the core and the inductance
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/10—Circuit arrangements for fine tuning, e.g. bandspreading

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
GB27623/39A 1938-10-13 1939-10-10 Improvements in or relating to wireless receivers with band spreading Expired GB536412A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE536412X 1938-10-13
DE2285029X 1939-06-22
DE2252100X 1939-06-28

Publications (1)

Publication Number Publication Date
GB536412A true GB536412A (en) 1941-05-14

Family

ID=32096473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27623/39A Expired GB536412A (en) 1938-10-13 1939-10-10 Improvements in or relating to wireless receivers with band spreading

Country Status (6)

Country Link
US (2) US2252100A (xx)
BE (1) BE440362A (xx)
DE (1) DE1081072B (xx)
FR (3) FR860823A (xx)
GB (1) GB536412A (xx)
NL (1) NL64971C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963884C (de) * 1949-03-04 1957-05-16 Siemens Ag Schaltung zur Frequenznachstellung

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE442583A (xx) * 1940-08-28
DE761144C (de) * 1941-01-27 1952-11-10 Telefunken Gmbh Empfaenger mit Bandspreizung im Kurzwellenbereich
DE976578C (de) * 1941-04-11 1963-12-05 Siemens Ag Variometeranordnung mit verschiedenen Variationsbereichen
NL57804C (xx) * 1941-07-01
DE952184C (de) * 1942-03-14 1956-11-15 Lorenz C Ag Empfaenger mit Permeabilitaetsabstimmung durch Verschieben von Eisenkernen fuer Bandspreizung
US2424506A (en) * 1942-10-24 1947-07-22 Rca Corp Permeability-tuned short-wave spread-band receiver
DE933346C (de) * 1950-10-21 1955-09-22 Siemens Ag Variometer mit beweglichem Eisenkern, insbesondere zur Kurzwellenbandspreizung in Rundfunkgeraeten
DE864894C (de) * 1951-03-15 1953-01-29 Saba Gmbh Vorrichtung zum Feinabstimmen hochfrequenter Schwingungskreise, vorzugsweise fuer Rundfunkgeraete
DE902265C (de) * 1951-11-20 1954-01-21 Oskar Vierling Dr Abstimmanordnung und Aufbau von Kleinempfaengern
DE4012265A1 (de) * 1990-04-17 1991-10-24 Toepholm & Westermann Schaltungsanordnung fuer einen ausgangstankkreis einer mit frequenzumtastung betriebenen sender-endstufe
US5302415A (en) * 1992-12-08 1994-04-12 E. I. Du Pont De Nemours And Company Electroless plated aramid surfaces and a process for making such surfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963884C (de) * 1949-03-04 1957-05-16 Siemens Ag Schaltung zur Frequenznachstellung

Also Published As

Publication number Publication date
US2252100A (en) 1941-08-12
BE440362A (xx)
FR51427E (fr) 1942-06-24
DE1081072B (de) 1960-05-05
FR860823A (fr) 1941-01-24
US2285029A (en) 1942-06-02
FR51420E (fr) 1942-06-24
NL64971C (xx)

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