GB605807A - Improvements in or relating to devices for simultaneously tuning oscillatory circuits having different resonance frequencies - Google Patents

Improvements in or relating to devices for simultaneously tuning oscillatory circuits having different resonance frequencies

Info

Publication number
GB605807A
GB605807A GB451/46A GB45146A GB605807A GB 605807 A GB605807 A GB 605807A GB 451/46 A GB451/46 A GB 451/46A GB 45146 A GB45146 A GB 45146A GB 605807 A GB605807 A GB 605807A
Authority
GB
United Kingdom
Prior art keywords
relating
devices
oscillatory circuits
resonance frequencies
different resonance
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
GB451/46A
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 GB605807A publication Critical patent/GB605807A/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
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Coils Or Transformers For Communication (AREA)
GB451/46A 1940-10-16 1946-01-05 Improvements in or relating to devices for simultaneously tuning oscillatory circuits having different resonance frequencies Expired GB605807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL231616X 1940-10-16

Publications (1)

Publication Number Publication Date
GB605807A true GB605807A (en) 1948-07-30

Family

ID=19779997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB451/46A Expired GB605807A (en) 1940-10-16 1946-01-05 Improvements in or relating to devices for simultaneously tuning oscillatory circuits having different resonance frequencies

Country Status (6)

Country Link
US (1) US2363101A (enrdf_load_stackoverflow)
BE (1) BE450074A (enrdf_load_stackoverflow)
CH (1) CH231616A (enrdf_load_stackoverflow)
FR (1) FR894036A (enrdf_load_stackoverflow)
GB (1) GB605807A (enrdf_load_stackoverflow)
NL (2) NL99230B (enrdf_load_stackoverflow)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899654A (en) * 1959-08-11 Variable inductance device
US2474761A (en) * 1942-07-15 1949-06-28 Hartford Nat Bank & Trust Co Coil having a slidable core and method of establishing the ratio between the maximumand minimum inductance thereof
US3052860A (en) * 1945-09-17 1962-09-04 Iii Francis M Walters Radio frequency choke
US2505791A (en) * 1946-02-27 1950-05-02 Zenith Radio Corp Inductance tuning apparatus
US2477749A (en) * 1946-04-04 1949-08-02 Aladdin Ind Inc Inductor tuning system
US2528167A (en) * 1948-03-23 1950-10-31 Rca Corp Band-spread tuning inductance device
US2496058A (en) * 1948-05-22 1950-01-31 Rca Corp Permeability tuner
US2621324A (en) * 1948-07-21 1952-12-09 Rca Corp Permeability tuned variable inductance
US2565261A (en) * 1948-09-11 1951-08-21 Rca Corp Permeability tuning system for superheterodyne receiver
US2533810A (en) * 1949-08-13 1950-12-12 Aladdin Ind Inc Wide band calibrated tuner and inductor for use therewith
US2645718A (en) * 1950-06-06 1953-07-14 Rca Corp Variable inductance structure
US2750495A (en) * 1951-11-20 1956-06-12 Motorola Inc Receiver which tunes by adjusting magnetic core antenna
US2979655A (en) * 1957-09-19 1961-04-11 Magnaflux Corp Method and apparatus for detecting flaws
US3017589A (en) * 1958-05-13 1962-01-16 Int Resistance Co Differential transformer
DE3618953A1 (de) * 1986-06-05 1987-12-10 Electronic Werke Deutschland Amplitudenspule fuer die zeilenendstufe eines fernsehempfaengers

Also Published As

Publication number Publication date
FR894036A (fr) 1944-12-12
NL56233C (enrdf_load_stackoverflow)
NL99230B (enrdf_load_stackoverflow)
BE450074A (enrdf_load_stackoverflow)
US2363101A (en) 1944-11-21
CH231616A (de) 1944-03-31

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