GB490224A - Improvements in high frequency coils - Google Patents

Improvements in high frequency coils

Info

Publication number
GB490224A
GB490224A GB3986/37A GB398637A GB490224A GB 490224 A GB490224 A GB 490224A GB 3986/37 A GB3986/37 A GB 3986/37A GB 398637 A GB398637 A GB 398637A GB 490224 A GB490224 A GB 490224A
Authority
GB
United Kingdom
Prior art keywords
wave
coils
short
coil
feb
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
GB3986/37A
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.)
Johnson Laboratories Inc
Original Assignee
Johnson Laboratories Inc
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 Johnson Laboratories Inc filed Critical Johnson Laboratories Inc
Publication of GB490224A publication Critical patent/GB490224A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

490,224. Wireless receiving-apparatus. JOHNSON LABORATORIES, Inc. Feb. 10, 1937, No. 3986. Convention date, Feb. 10, 1936. [Class 40 (v)] [Also in Group XXXV] A wave band tuner comprises a short wave coil 17 having an adjustable iron core 19, a medium wave coil 25 having an iron core 26, and positioned with its axis at right-angles to that of the short wave coil, and a long wave coil 28 having a trimmer condenser 29 associated therewith, the coils being mounted within a screening can 1. The short and medium wave coils may have coupled windings to form transformers. Trimmer condensers 16 are provided for the coils 17, 25. A wave - change switch 4 is mounted at the base of the can 1. A number of such units may be mounted together and the switches coupled.
GB3986/37A 1936-02-10 1937-02-10 Improvements in high frequency coils Expired GB490224A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US490224XA 1936-02-10 1936-02-10

Publications (1)

Publication Number Publication Date
GB490224A true GB490224A (en) 1938-08-10

Family

ID=21957666

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3986/37A Expired GB490224A (en) 1936-02-10 1937-02-10 Improvements in high frequency coils

Country Status (1)

Country Link
GB (1) GB490224A (en)

Similar Documents

Publication Publication Date Title
GB426727A (en) Improvements in or relating to high frequency electrical circuits
GB490224A (en) Improvements in high frequency coils
GB464970A (en) Improvements in coupling coil systems for oscillatory electric circuits
GB502296A (en) Improvements in or relating to high frequency inductance coils
GB444608A (en) Improvements in high frequency coupling coils
GB450286A (en) Improvements relating to coils for use in high-frequency electrical apparatus
GB609708A (en) Improvements in and relating to ultra high frequency inductors
GB468364A (en) Improvements in and relating to high frequency iron core transformers
GB449163A (en) Improvements in or relating to tuning systems for wireless receivers
GB512760A (en) Improvements in or relating to electric inductors for use at high frequencies
GB470002A (en) Improvements in and relating to wireless and like receivers
GB550311A (en) Improvements in and relating to current transformers
GB390348A (en) Improvements in wireless receiving apparatus
GB433772A (en) Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus
GB440254A (en) Improvements in or relating to screened tuned units suitable for use in wireless receiving apparatus
GB471507A (en) Variable inductance tuning device
GB435255A (en) Improvements in tuners for high frequency currents
GB425481A (en) Improvements in or relating to variable inductances and variably tunable circuits incorporating the same
GB468774A (en) Arrangement of inductance coils
GB465593A (en) Improvements in and relating to radio frequency receiving systems
GB555732A (en) Improvements in or relating to variable permeability tuning systems for electric circuits
GB467786A (en) Improvements relating to electric transformers
GB529999A (en) Improvements in or relating to electrical networks
GB776305A (en) Improvements in or relating to intermediate frequency transformers
GB565895A (en) Improvements in or relating to variable inductance devices