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GB433772A - Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus - Google Patents

Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus

Info

Publication number
GB433772A
GB433772A GB1415834A GB1415834A GB433772A GB 433772 A GB433772 A GB 433772A GB 1415834 A GB1415834 A GB 1415834A GB 1415834 A GB1415834 A GB 1415834A GB 433772 A GB433772 A GB 433772A
Authority
GB
United Kingdom
Prior art keywords
relating
high frequency
receiving apparatus
wireless receiving
frequency circuits
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
GB1415834A
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.)
Aladdin Industries Ltd
Original Assignee
Aladdin Industries Ltd
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 Aladdin Industries Ltd filed Critical Aladdin Industries Ltd
Priority to GB1415834A priority Critical patent/GB433772A/en
Publication of GB433772A publication Critical patent/GB433772A/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)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

433,772. Inductances. POLYDOROFF, W. J., 609, West Lake Street, Chicago, U.S.A., and ALADDIN INDUSTRIES, Ltd., Greenford, Middlesex. Aug. 25, 1934, No. 14159/35. Divided out of 429,826. [Class 37] A high-frequency variable inductance is provided with a core 5 of comminuted magnetic material which is moved relatively to two coils connected in opposition, the arrangement being such that as it is moved out of one coil it is simultaneously moved into the other. Coils 1, 2 may have different diameters and are coaxial, a switch S disconnecting the coil 2 or connecting it in series opposition. The unit may be employed over two or more frequency ranges, the switch being automatically operated by the core. Specifications 366,475, 403,368, 403,426, and 434,675 are referred to.
GB1415834A 1934-08-25 1934-08-25 Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus Expired GB433772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1415834A GB433772A (en) 1934-08-25 1934-08-25 Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1415834A GB433772A (en) 1934-08-25 1934-08-25 Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus

Publications (1)

Publication Number Publication Date
GB433772A true GB433772A (en) 1935-08-20

Family

ID=10036052

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1415834A Expired GB433772A (en) 1934-08-25 1934-08-25 Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus

Country Status (1)

Country Link
GB (1) GB433772A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759378C (en) * 1938-07-28 1954-02-22 Siemens & Halske A G Variometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759378C (en) * 1938-07-28 1954-02-22 Siemens & Halske A G Variometer

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