US2823382A - Radio-receiver - Google Patents

Radio-receiver Download PDF

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Publication number
US2823382A
US2823382A US415923A US41592354A US2823382A US 2823382 A US2823382 A US 2823382A US 415923 A US415923 A US 415923A US 41592354 A US41592354 A US 41592354A US 2823382 A US2823382 A US 2823382A
Authority
US
United States
Prior art keywords
receiver
aerial
transformer
frame
radio
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 - Lifetime
Application number
US415923A
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English (en)
Inventor
Blok Henri
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2823382A publication Critical patent/US2823382A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a radio receiver. More particularly, the invention relates to a radio receiver comprising an aerial, more particularly, an incorporated frame aerial structurally united with the apparatus and a highfrequency transformer having a core of ferromagnetic material, more particularly a ferrite of poor conductivity.
  • the high-frequency transformer is not provided with magnetic screening, such apparatus is found to have a receiving power which varies to a high extent with the position of the core axis relative to the frame. It may be assumed that this is due to the fact that the highfrequency transformer operates to a considerable degree as a directional aerial and the signal produced thereby increases or attenuates the signal produced by the aerial proper in accordance with the position of the core of ferromagnetic material and with the sense of the connection of the winding of the coils.
  • this phenomenon is utilized to obtain a material increase in receiving power.
  • the core of the high-frequency transformer is positioned approxi mately at right angles to the plane of the frame aerial and the sense of the connection of winding of the coils of the transformer is such that the transformer, operating as an aerial, increases the signal produced by the frame aerial.
  • the component parts of a radio receiver are housed in a rectangular cabinet of wood or other insulating material.
  • the frame aerial In order to obtain a large surface for the frame aerial, it is usually arranged in a diagonal plane at right angles to the top and bottom surfaces of the cabinet. Provision is often made of two frame aerials each in a ditfcrent diagonal plane, used separately or in con unction.
  • the axis of the coils contained in the receiver system is not vertical in this case, as is common practice to do, but horizontal, approximately at right angles to the front surface of the cabinet.
  • Fig. l is a perspective schematic of an embodiment of a radio receiver viewed from the rear;
  • Fig. 2 is a lateral view of the high-frequency transformer of the embodiment of Fig. l;
  • Fig. 3 is a schematic diagram of the circuit arrangement of the high-frequency transformer of the embodiment of Fig. 1.
  • reference numeral 1 designates the cabinet, which is opened at the rear.
  • the cabinet comprises the frame aerials 2 and 3, each of which may comprise one or more turns and which may be included separately or in conjunction in the input circuit of the receiver.
  • the cabinet comprises furthermore a chassis 4, in which and on which the various parts of the apparatus, for example. the tubes 5, are mounted.
  • a high-frequency "ice transformer comprising a cylindrical core 6 of ferromagnetic material of poor conductivity, for example, a ferrite, and two coils 7 and 8.
  • the length of the core which may be bored, is large with respect to the diameter.
  • the transformer may be connected as is indicated in Fig. 3 so that, by switching from one frame aerial to the other, the directivity of the aerial system may be changed and stations in different directions from the receiver may be received under conditions of maximum aerial sensitivity without changing the physical position of the receiver.
  • the apparatus may, for example, be adapted to receive the medium-wave range extending from 200 to 600 meters.
  • the primary coil 7, surrounding the secondary coil 8, will in this case comprise in general only a few turns.
  • the secondary coil 8 is included in the input circuit of a high-frequency amplifier or of a mixing tube of the receiver system.
  • the transformer is mounted on a plate 9, which is secured to the chassis 4 proper in a manner such that the axis of the core 6 is approximately at right angles to the front surface of the apparatus. Since the angle between the frames 2 and 3 is assumed to be obtuse, the angle between the plane of the front surface of the receiver and the planes of the frame aerials is comparatively small, so that the axis of the core 6 is substantially at right angles to the planes of both of the frame aerials.
  • the transformer is not screened magnetically by means of a completely closed sleeve.
  • a high-frequency transformer is used for each of these ranges, all cores being arrangeable at right angles to the front surface of the apparatus.
  • a radio receiver comprising a radio signal receiving assembly, a frame aerial system serving as an antenna for intercepting a radiated signal and comprising a signal PICK-11p winding arranged in a given plane and in close proximity to said assembly, said assembly comprising a high frequency transformer comprising a signal processing coil having a core of magnetic material and a longitudinal axis tnerethrough, said coil being arranged on said assembly with its said axis substantially perpendicular to the said given plane and being positioned to intercept said radiated signal, said coil being coupled to said signal pick-up winning in the same sense thereby producmg addition of the signals of said pick-up winding and said coil.

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  • Coils Or Transformers For Communication (AREA)
  • Details Of Aerials (AREA)
US415923A 1953-03-17 1954-03-12 Radio-receiver Expired - Lifetime US2823382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2823382X 1953-03-17

Publications (1)

Publication Number Publication Date
US2823382A true US2823382A (en) 1958-02-11

Family

ID=19875895

Family Applications (1)

Application Number Title Priority Date Filing Date
US415923A Expired - Lifetime US2823382A (en) 1953-03-17 1954-03-12 Radio-receiver

Country Status (3)

Country Link
US (1) US2823382A (de)
DE (1) DE957240C (de)
FR (1) FR1100430A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3261019A (en) * 1964-04-13 1966-07-12 John E Lundy Picture antenna for television sets
US3845417A (en) * 1958-02-21 1974-10-29 Singer Co Gyromagnetic circuit element
US4937586A (en) * 1986-09-22 1990-06-26 Stevens John K Radio broadcast communication systems with multiple loop antennas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB355858A (en) * 1930-06-13 1931-09-03 Reginald Custerson Improvements in loop-antennas
US2074944A (en) * 1933-09-30 1937-03-23 Hjalmar E Sjostrand Radio antenna
US2383415A (en) * 1943-03-11 1945-08-21 Wladimir J Polydoroff Loop antenna apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB355858A (en) * 1930-06-13 1931-09-03 Reginald Custerson Improvements in loop-antennas
US2074944A (en) * 1933-09-30 1937-03-23 Hjalmar E Sjostrand Radio antenna
US2383415A (en) * 1943-03-11 1945-08-21 Wladimir J Polydoroff Loop antenna apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845417A (en) * 1958-02-21 1974-10-29 Singer Co Gyromagnetic circuit element
US3261019A (en) * 1964-04-13 1966-07-12 John E Lundy Picture antenna for television sets
US4937586A (en) * 1986-09-22 1990-06-26 Stevens John K Radio broadcast communication systems with multiple loop antennas

Also Published As

Publication number Publication date
DE957240C (de) 1957-01-31
FR1100430A (fr) 1955-09-20

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