GB628998A - Improvements in or relating to inductive coupling devices for radio receivers - Google Patents

Improvements in or relating to inductive coupling devices for radio receivers

Info

Publication number
GB628998A
GB628998A GB36433/46A GB3643346A GB628998A GB 628998 A GB628998 A GB 628998A GB 36433/46 A GB36433/46 A GB 36433/46A GB 3643346 A GB3643346 A GB 3643346A GB 628998 A GB628998 A GB 628998A
Authority
GB
United Kingdom
Prior art keywords
primary
coils
relating
coupling
inductive coupling
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
GB36433/46A
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 GB628998A publication Critical patent/GB628998A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/06—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/008—Receiver or amplifier input circuits

Landscapes

  • Near-Field Transmission Systems (AREA)

Abstract

628,998. Transformers. PHILIPS LAMPS, Ltd. Dec. 10, 1946, No. 36433. Convention date, Aug. 9, 1943. [Class 38 (ii)] [Also in Group XL (c)] In adjusting the coupling between the primary and secondary coils 2, 4, of a receiver aerial coupling a compensating closed coil 7, or a conductive or ferromagnetic body, is simultaneously moved axially to or from the secondary oppositely to the movement of the primary to maintain the total effective inductance of the secondary circuit constant. The coils may be slidably moved within the secondary on bobbins 2, 4 by a spindle 6 with their centres fixedly spaced apart the same length as the secondary. The Specification as open to inspection under Sect. 91 comprises also the ferromagnetic body being a core of the primary coil or a layer of ferromagnetic material mixed with a binder and applied to the turns of the primary, so that it moves coincidently with the primary. This subject-matter does not appear in the Specification as accepted.
GB36433/46A 1943-08-09 1946-12-10 Improvements in or relating to inductive coupling devices for radio receivers Expired GB628998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL628998X 1943-08-09

Publications (1)

Publication Number Publication Date
GB628998A true GB628998A (en) 1949-09-08

Family

ID=19788668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36433/46A Expired GB628998A (en) 1943-08-09 1946-12-10 Improvements in or relating to inductive coupling devices for radio receivers

Country Status (3)

Country Link
FR (1) FR906695A (en)
GB (1) GB628998A (en)
NL (1) NL65491C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948067C (en) * 1951-04-15 1956-08-30 Telefunken Gmbh Coil with high frequency core
CN1333493C (en) * 2001-05-23 2007-08-22 尼欧斯德帕米茨瑞德两合股份有限公司 Ferrite antenna

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL176728C (en) * 1975-04-04 1985-05-17 Philips Nv ADJUSTABLE BELT FILTER WITH ADJUSTABLE SUPPRESSION.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948067C (en) * 1951-04-15 1956-08-30 Telefunken Gmbh Coil with high frequency core
CN1333493C (en) * 2001-05-23 2007-08-22 尼欧斯德帕米茨瑞德两合股份有限公司 Ferrite antenna

Also Published As

Publication number Publication date
FR906695A (en) 1946-01-16
NL65491C (en) 1900-01-01

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