GB376670A - Improvements in or relating to devices for obtaining radio reception free from interference - Google Patents

Improvements in or relating to devices for obtaining radio reception free from interference

Info

Publication number
GB376670A
GB376670A GB3347/32A GB334732A GB376670A GB 376670 A GB376670 A GB 376670A GB 3347/32 A GB3347/32 A GB 3347/32A GB 334732 A GB334732 A GB 334732A GB 376670 A GB376670 A GB 376670A
Authority
GB
United Kingdom
Prior art keywords
coils
interference
coupling
feb
adjust
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
GB3347/32A
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.)
Koninklijke Philips NV
Original Assignee
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB376670A publication Critical patent/GB376670A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1009—Placing the antenna at a place where the noise level is low and using a noise-free transmission line between the antenna and the receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters And Equalizers (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Near-Field Transmission Systems (AREA)
  • Noise Elimination (AREA)

Abstract

376,670. Wireless receiving systems. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Feb. 4, 1932, No. 3347. Convention date, Feb. 18, 1931. [Class 40 (v).] Relates to systems for cutting-out local interference by utilizing two aerials of unequal length and coupling them to the receiver in such a way that the common pick-up due to the interference is balanced out, leaving the desired signal alone to influence the set. According to the invention a balancing condenser 7 is inserted in series with the two aerial coils 4, 5 so as to adjust the effective earthing point 6. The coupling coils are enclosed in an earthed screening-box 9 ; capacity-coupling between them is prevented by an earthed screen 10; and the lead-in conductors to the set 3 are also screened at 11. Fig. 2 shows an alternative arrangement utilizing a differential condenser 14, 15 to adjust the earthing point. The two aerial coils may be tuned by condensers shunted across the coils 4, 5.
GB3347/32A 1931-02-18 1932-02-04 Improvements in or relating to devices for obtaining radio reception free from interference Expired GB376670A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE376670X 1931-02-18
DE377116X 1931-04-25

Publications (1)

Publication Number Publication Date
GB376670A true GB376670A (en) 1932-07-14

Family

ID=31888942

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3347/32A Expired GB376670A (en) 1931-02-18 1932-02-04 Improvements in or relating to devices for obtaining radio reception free from interference
GB3586/32A Expired GB377116A (en) 1931-02-18 1932-02-06 Improvements in or relating to devices for obtaining radio reception free from interference

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3586/32A Expired GB377116A (en) 1931-02-18 1932-02-06 Improvements in or relating to devices for obtaining radio reception free from interference

Country Status (4)

Country Link
US (2) US2054645A (en)
BE (1) BE386144A (en)
FR (1) FR730830A (en)
GB (2) GB376670A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617926A (en) * 1948-07-29 1952-11-11 Sissman Louise Interference reducing radio receiving system
US10600564B2 (en) * 2010-05-19 2020-03-24 Auckland Uniservices Limited Inductive power transfer system primary track topologies

Also Published As

Publication number Publication date
US1978661A (en) 1934-10-30
GB377116A (en) 1932-07-21
US2054645A (en) 1936-09-15
BE386144A (en)
FR730830A (en) 1932-08-24

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